9-2-5: AMENDMENTS TO RESIDENTIAL CODE:
The following provisions of the international residential code for one- and two-family dwellings, 2015 edition (IRC), as amended and revised by the Oklahoma uniform building code commission, are now added, deleted or amended to read as follows:
IRC 2015 Chapter 1 Scope And Administration
R101.1 Title - Bixby Amendatory. These provisions shall be known and may be cited as the "Residential Code For One- And Two-Family Dwellings Of The City Of Bixby" or as the "Bixby Residential Building Code."
IRC 2015 Chapter 2 Definitions
Building Drain - OUBCC Amendatory. This definition has been modified to align with the industry standard where the site sewer (civil) picks up 5 feet outside of the building. This definition has been modified to read:
"Building Drain. That part of the lowest piping of a drainage system that receives the discharge from soil, waste, and other drainage pipes inside and that extends 5 feet (1524 mm) in developed length of pipe beyond the exterior walls of the building and conveys the drainage to the building sewer."
[RE] High-Efficacy Lamps - OUBCC Amendatory. This definition has been modified to strike a reference to chapter 11, section N1101.6 and add language regarding applicable requirements for energy efficiency. This definition has been modified to read:
"[RE] High-Efficacy Lamps. Compact fluorescent lamps, light emitting diode (L.E.D.) type lamps, T-8 or smaller diameter linear fluorescent lamps, or lamps with a minimum efficacy of:
      1.   60 lumens per watt for lamps over 40 watts;
      2.   50 lumens per watt for lamps over 15 watts to 40 watts; and
      3.   40 lumens per watt for lamps 15 watts or less."
[RE] Insulated Sheathing - OUBCC Amendatory. This definition has been modified to strike a reference to chapter 11, section N1101.6. This definition has been modified to read:
"[RE] Insulated Sheathing. An insulating board having a thermal resistance of not less than R-2 of the core material."
Nationally Recognized Testing Laboratory - OUBCC Added. This definition has been added to define a nationally recognized testing laboratory. This definition has been added to read:
"Nationally Recognized Testing Laboratory. A testing facility given this designation from the United States occupational safety and health administration (OSHA) that provides product safety testing and certification services to manufacturers."
[RB] Roof Recover - OUBCC Amendatory. This definition has been modified to strike a reference to chapter 11, section N1101.6. This definition has been modified to read:
"[RB] Roof Recover. The process of installing an additional roof covering over a prepared existing roof covering without removing the existing roof covering."
Safe Room - OUBCC Added. The definition of a "Safe Room" has been added to define a building, structure or portion thereof, built to provide protection from severe wind storm events such as tornados or hurricanes and includes sub-definitions for a community safe room and other safe room. The definition has been added to read:
"Safe Room. A building or structure or portions thereof, constructed in accordance with ICC/NSSA standard for the design and construction of storm shelters, (ICC 500), and constructed to provide near-absolute protection for its occupants from severe wind storm events such as tornados or hurricanes.
      1.   Community Safe Room. A safe room designed and constructed in accordance with the federal emergency management agency (FEMA) document P-361 entitled "Design And Construction Guidance For Community Safe Rooms (FEMA P-361), intended to provide life-safety protection for more than 16 persons.
      2.   Other Safe Room. A safe room designed and constructed in accordance with FEMA P-361 "Design And Construction Guidance For Community Safe Rooms" or FEMA P-320® entitled "Taking Shelter From The Storm: Building A Safe Room For Your Home Or Small Business," located in a residence or non-residential building or structure, intended to provide life-safety protection for 16 persons or less."
[RE] Skylight - OUBCC Deleted. This definition has been stricken from the code.
[RE] Sleeping Unit - OUBCC Deleted. This definition has been stricken from the code.
Storm Shelter - OUBCC Added. The definition of a "Storm Shelter" has been added to define a building, structure or portion thereof built to provide protection from severe wind storm events such as tornados or hurricanes. The definition has been added to read:
"Storm Shelter. A building, structure, or portions thereof, constructed in accordance with ICC 500 and designated for use during a severe wind storm event such as a hurricane or tornado.
      1.   Community Storm Shelter. A storm shelter not defined as a "residential storm shelter."
      2.   Residential Storm Shelter. A storm shelter serving occupants of dwelling units and having an occupant load not exceeding 16 persons."
[RB] Sunroom - OUBCC Amendatory. This definition has been modified to strike a reference to chapter 11, section N1101.6. This definition has been modified to read:
"[RB] Sunroom. A one-story structure attached to a dwelling with a glazing area in excess of 40 percent of the gross area of the structure's exterior walls and roof."
[RB] Thermal Isolation - OUBCC Amendatory. This definition has been modified to strike a reference to chapter 11, section N1101.6. This definition has been modified to read:
"[RB] Thermal Isolation. Physical and space conditioning separation from conditioned space(s) consisting of existing or new walls, doors, or windows. The conditioned space(s) shall be controlled as separate zones for heating and cooling or conditioned by separate equipment."
[RE] U-Factor Thermal Transmittance - OUBCC Amendatory. This definition has been modified to strike a reference to chapter 11, section N1101.6 and add language for applicable requirements for energy efficiency. This definition has been modified to read:
"[RE] U-Factor Thermal Transmittance. The coefficient of heat transmission (air to air) through a building envelope component or assembly, equal to the time rate of heat flow per unit area and unit temperature difference between the warm side and cool side air films (btu/h x square feet x Fahrenheit)."
Ventilation - OUBCC Amendatory. This definition has been modified to strike a reference to chapter 11, section N1101.6. This definition has been modified to read:
"Ventilation. The natural or mechanical process of supplying conditioned or unconditioned air to, or removing such air from, any space."
Whole-House Mechanical Ventilation System - OUBCC Amendatory. This definition has been modified to strike a reference to chapter 11, section N1101.6. This definition has been modified to read:
"Whole-House Mechanical Ventilation System. An exhaust system, supply system or combination thereof that is designed to mechanically exchange indoor air for outdoor air where operating continuously or through a programmed intermittent schedule to satisfy the whole-house ventilation rate."
IRC 2015 Chapter 3 Building Planning
Table R302.1(1) Exterior Walls - OUBCC Amendatory. This table has been modified to change most of the requirements in the column entitled "Minimum Fire Separation Distance" and to delete certain sub-rows under the column "Exterior Wall Element". The table description with modifications, is listed below:
      1.   There are three columns in the table entitled "Exterior Wall Element," "Minimum Fire-Resistance Rating," and "Minimum Fire Separation Distance."
      2.   Under the column entitled "Exterior Wall Element" the first row, entitled "Walls - Fire-resistance rated," has been modified to change the requirement in the column "Minimum Fire Separation Distance" from "Less than 5 feet" to "Less than 3 feet."
      3.   Under the column entitled "Exterior Wall Element" the second row, entitled "Walls - Not fire-resistance rated," has been modified to change the requirement in the column "Minimum Fire Separation Distance" from "Greater than or equal to 5 feet" to "Greater than or equal to 3 feet."
      4.   Under the column entitled "Exterior Wall Element" the third row, entitled "Projections - Not allowed," has been stricken from the table.
      5.   Under the column entitled "Exterior Wall Element" the fourth row, entitled "Projections - Fire-resistance rated," has been modified to change the requirement in the column "Minimum Fire Separation Distance" from "Greater than or equal to 2 feet to less than 5 feet" to "Less than 3 feet."
      6.   Under the column entitled "Exterior Wall Element" the fifth row, entitled "Projections - Not fire-resistance rated," has been modified to change the requirement in the column "Minimum Fire Separation Distance" from "Greater than or equal to 5 feet" to "Greater than or equal to 3 feet."
      7.   Under the column entitled "Exterior Wall Element" the sixth row, entitled "Openings in walls - Not allowed," has not been modified from the requirements in the existing table.
      8.   Under the column entitled "Exterior Wall Element" the seventh row, entitled "Openings in walls - 25 percent maximum of wall area," has been stricken from the code.
      9.   Under the column entitled "Exterior Wall Element" the eighth row, entitled "Openings in walls - Unlimited," has been modified to change the requirement in the column "Minimum Fire Separation Distance" from "5 feet" to "Greater than or equal to 3 feet."
      10.   Under the column entitled "Exterior Wall Element" the ninth row, entitled "Penetrations - All," has been modified to change the requirement for the second sub-row in the column entitled "Minimum Fire Separation Distance" from "3 feet" to "Greater than or equal to 3 feet."
      TABLE R302.1(1) - EXTERIOR WALLS
 
Exterior Wall Element
Minimum
Fire-Resistance
Rating
Minimum
Fire Separation
Distances
Walls
Fire-resistance rated
1 hour - tested in accordance with ASTM E119 or UL 263 with exposure from both sides
<3 feet
Not fire-resistance rated
0 hours
3 feet
Projections
Fire-resistance rated
1 hour on the underside a,b
<3 feet
Not fire-resistance rated
0 hours
3 feet
Openings in walls
Not allowed
n/a
<3 feet
Unlimited
0 hours
3 feet
Penetrations
All
Comply with section R302.4
<3 feet
None required
3 feet
 
   For SI: 1 foot = 304.8 mm
   n/a = Not applicable.
         a.      Roof eave fire-resistance rating shall be permitted to be reduced to 0 hours on the underside of the eave if fireblocking is provided from the wall top plate to the underside of the roof sheathing.
         b.      Roof eave fire-resistance rating shall be permitted to be reduced to 0 hours on the underside of the eave provided that gable vent openings are not installed.
Table R302.1(2) Exterior Walls - Dwellings With Fire Sprinklers - OUBCC Amendatory. This table has been modified to strike certain sub-rows underneath the column "Exterior Wall Element." The table description with modifications is listed below:
      1.   There are three columns in the table entitled "Exterior Wall Element," "Minimum Fire-Resistance Rated," and "Minimum Fire Separation Distance."
      2.   There are four rows entitled "Walls," "Projections", "Openings in walls" and "Penetrations."
      3.   The row entitled "Walls" under the column "Exterior Wall Elements" contains two sub-rows entitled "Fire- resistance rated" and "Not fire-resistance rated". No modifications have been made to this row and the associated sub-rows.
      4.   The row entitled "Projections" under the column "Exterior Wall Elements" contains three sub-rows entitled "Not allowed," Fire-resistance rated" and "Not fire- resistance rated." The sub-row entitled "Projections - Not allowed" has been stricken from the table. The remaining sub-rows have not been modified.
      5.   The row entitled "Openings in walls" under the column "Exterior Wall Elements" contains two sub-rows entitled "Not allowed" and "Unlimited." No modifications have been made to this row and the associated sub-rows.
      6.   The row entitled "Penetrations" under the column "Exterior Wall Elements" does not have any sub-rows and has not been modified.
      TABLE R302.1(2) - EXTERIOR
      WALLS - DWELLINGS WITH FIRE SPRINKLERS
 
Exterior Wall Element
Minimum
Fire-Resistance
Rating
Minimum
Fire Separation
Distances
Walls
Fire-resistance rated
1 hour - tested in accordance with ASTM E119 or UL 263 with exposure from both sides
0 feet
Not fire-resistance rated
0 hours
3 feet a
Projections
Fire-resistance rated
1 hour on the undersideb,c
2 feeta
Not fire-resistance rated
0 hours
3 feet
Openings in walls
Not allowed
n/a
<3 feet
Unlimited
0 hours
3 feeta
Penetrations
All
Comply with section R302.4
<3 feet
None required
3 feeta
 
   For SI: 1 foot = 304.8 mm
   n/a = Not applicable.
         a.      For residential subdivisions where all dwellings are equipped throughout with an automatic sprinkler system installed in accordance with section P2904, the fire separation distance for nonrated exterior walls and rated projections shall be permitted to be reduced to 0 feet, and unlimited unprotected openings and penetrations shall be permitted, where the adjoining lot provides an open setback yard that is 6 feet or more in width on the opposite side of the property line.
         b.      The roof eave fire-resistance rating shall be permitted to be reduced to 0 hours on the underside of the eave if fireblocking is provided from the wall top plate to the underside of the roof sheathing.
         c.      The roof eave fire-resistance rating shall be permitted to be reduced to 0 hours on the underside of the eave provided that gable vent openings are not installed.
R303.1 Habitable Rooms - OUBCC Amendatory. The first exception to this section has been modified to change the aggregate glazing area when certain conditions are met. This section has been modified to read:
"R303.1 Habitable Rooms. Habitable rooms shall have an aggregate glazing area of not less than 8 percent of the floor area of such rooms. Natural ventilation shall be through windows, skylights, doors, louvers or other approved openings to the outdoor air. Such openings shall be provided with ready access or shall otherwise be readily controllable by the building occupants. The openable area to the outdoors shall not be less than 4 percent of the floor area being ventilated.
Exceptions:
      1.   The glazed areas need not be openable where the opening is not required by section R310 and an approved mechanical ventilation system capable of producing 0.35 air change per hour in the room is installed or a whole- house mechanical ventilation system is installed capable of supplying outdoor ventilation air of 15 cubic feet per minute (cfm) per occupant on the basis of two occupants for the first bedroom and one occupant for each additional bedroom.
      2.   The glazed areas need not be installed in rooms where exception 1 is satisfied and artificial light is provided that is capable of producing an average illumination of 6 footcandles (65 lux) over the area of the room at a height of 30 inches (762 mm) above the floor level.
      3.   Use of sunroom and patio covers, as defined in section R202, shall be permitted for natural ventilation if in excess of 40 percent of the exterior sunroom walls are open, or are enclosed only by insect screening."
R311.1 Means Of Egress - OUBCC Amendatory. This section has been modified to require garages to comply with the section requirements while allowing the means of egress from the garage to go through an adjacent dwelling. This section has been modified to read:
"R311.1 Means Of Egress. Dwellings and garages (attached or detached from the dwelling) shall be provided with a means of egress in accordance with this section. The means of egress shall provide a continuous and unobstructed path of vertical and horizontal egress travel from all portions of the dwelling to the required egress door without traveling through a garage. The means of egress from the garage may travel through the adjacent dwelling. The required egress door shall open directly into a public way or to a yard or court that opens to a public way."
R311.2 Egress Door - OUBCC Amendatory. This section has been modified to require garages to comply with the section requirements. This section has been modified to read:
"R311.2 Egress Door. Not less than one egress door shall be provided for each dwelling unit or garage. The egress door shall be side-hinged, and shall provide a clear width of not less than 32 inches (813 mm) where measured between the face of the door and the stop, with the door open 90 degrees (1.57 rad). The clear height of the door opening shall not be less than 78 inches (1981 mm) in height measured from the top of the threshold to the bottom of the stop. Other doors shall not be required to comply with these minimum dimensions. Egress doors shall be readily openable from the inside of the dwelling or garage without the use of a key or special knowledge or effort."
R311.7.5.1 Risers - OUBCC Amendatory. This section has been modified to add a third exception that allows the top and bottom riser height to vary by 3/4 inch (19 mm). This section has been modified to read:
"R311.7.5.1 Risers. The riser height shall be not more than 73/4 inches (196 mm). The riser shall be measured vertically between leading edges of the adjacent treads. The greatest riser height within any flight of stairs shall not exceed the smallest by more than 3/8 inch (9.5 mm). Risers shall be vertical or sloped from the underside of the nosing of the tread above at an angle not more than 30 degrees (0.51 rad) from the vertical. Open risers are permitted provided that the openings located more than 30 inches (762 mm), as measured vertically, to the floor or grade below do not permit the passage of a 4-inch-diameter (102 mm) sphere.
Exceptions:
      1.   The openings between adjacent treads is not limited on spiral stairways.
      2.   The riser height of spiral stairways shall be in accordance with section R311.7.10.1.
      3.   The top and bottom riser in each flight of stairs may vary by 3/4 inch (19 mm)."
R313.2 One- And Two-Family Dwellings Automatic Fire Systems - OUBCC Moved. This section, including the exception, has been moved to the newly created appendix V, entitled "Appendix V, Automatic Fire Systems" and is not adopted as a part of the statewide minimum code for residential construction within the state of Oklahoma. This section has been renumbered in appendix V to become V101.1. The section number R313.2 itself, will stay as part of this code for numbering alignment but will not have any requirements attached to it.
R313.2.1 Design And Installation - OUBCC Moved. This section has been moved to the newly created appendix V, entitled "Appendix V, Automatic Fire Systems" and is not adopted as a part of the statewide minimum code for residential construction within the state of Oklahoma. This section has been renumbered in appendix V to become V101.2. The section number R313.2.1 itself, will stay as part of this code for numbering alignment but will not have any requirements attached to it.
R314.2.2 Alterations, Repairs And Additions - OUBCC Amendatory. This section has been modified to include minor electrical alterations, repairs and additions in the second exception to the section. This section has been modified to read:
"R314.2.2 Alterations, Repairs And Additions. Where alterations, repairs, or additions requiring a permit occur, or where one or more sleeping rooms are added or created in existing dwellings, the individual dwelling unit shall be equipped with smoke alarms located as required for new dwellings.
Exceptions:
      1.   Work involving the exterior surfaces of dwellings, such as the replacement of roofing or siding, the addition or replacement of windows or doors, or the addition of a porch or deck, are exempt from the requirements of this section.
      2.   Installation, alteration, or repairs of electrical, plumbing or mechanical systems are exempt from the requirements of this section."
R315.2.2 Alterations, Repairs And Additions - OUBCC Amendatory. This section has been modified to include minor electrical alterations, repairs and additions in the second exception to the section. This section has been modified to read:
"R315.2.2 Alterations, Repairs And Additions. Where alterations, repairs, or additions requiring a permit occur, or where one or more sleeping rooms are added or created in existing dwellings, the individual dwelling unit shall be equipped with carbon monoxide alarms located as required for new dwellings.
Exceptions:
      1.   Work involving the exterior surfaces of dwellings, such as the replacement of roofing or siding, the addition or replacement of windows or doors, or the addition of a porch or deck, are exempt from the requirements of this section.
      2.   Installation, alteration, or repairs of electrical, plumbing or mechanical systems are exempt from the requirements of this section."
R323.1 General - OUBCC Amendatory. This section has been modified to include above and below ground storm shelters and safe rooms and to limit the use of the terms storm shelter and safe room. This section has been modified to read:
"R323.1 General. This section applies to the construction of above or below ground storm shelters and safe rooms constructed as separate detached buildings rooms within buildings, structures, or portions thereof for the purpose of providing safe refuge from storms that produce high winds, such as tornados. Any room or structure, as may be used as a place of refuge during a severe wind storm event, shall not be defined as a storm shelter or safe room unless specifically designed to the requirements listed in section R323. In addition to other applicable requirements in this code, storm shelters shall be constructed in accordance with the following: ICC/NSSA 500."
R323.2 Definitions - OUBCC Added. This section has been added to show the following terms were added to chapter 2 of this code. This section shall read:
"R323.2 Definitions. The following definitions are defined in chapter 2 of this code:
      1.   Safe Room
(i) Community safe room.
(ii) Other safe room.
      2.   Storm Shelter
(i) Community storm shelter.
(ii) Residential storm shelter."
R326.1 General - OUBCC Amendatory. This section has been modified to remove the requirement for the construction of swimming pools, spas, and hot tubs to comply with the international swimming pool and spa code and to require compliance with sections R326.2 through R326.4. This section has been modified to read:
"R326.1 General. Residential swimming pools, spas, and hot tubs requiring a permit shall comply with sections R326.2 through R326.4."
R326.2 Enclosure - OUBCC Added. This section has been added to provide enclosure requirements for residential swimming pools, spas, and hot tubs. This section has been added to read:
"R326.2 Enclosure. Swimming pools shall be completely enclosed by a fence or barrier not less than 4 feet (1219 mm) in height or a screen enclosure. Openings in the fence or barrier shall not permit the passage of a 4-inch-diameter (102 mm) sphere.
Exceptions:
      1.   Swimming pools, spas and hot tubs on lots in excess of 2 acres are exempt from the requirements.
      2.   A swimming pool with a power safety cover or a spa with a safety cover complying with ASTM F 1346 need not comply with this section."
R326.3 Gates - OUBCC Added. This section has been added to provide gate requirements for residential swimming pools, spas and hot tubs. This section has been added to read:
"R326.3 Gates. Exterior pedestrian access doors or gates shall be self-closing and have a self-latching device. Doors or gates other than pedestrian access doors or gates shall have a self-latching device. Where the release mechanism of the self-latching device is located less than 54 inches (1372 mm) from the bottom of the door or gate, the release mechanism shall be located on the pool side of the door or gate, 3 inches (76 mm) or more below the top of the door or gate, and the door or gate and barrier shall be without openings greater than 1/2 inch (12.7 mm) within 18 inches (457 mm) of the release mechanism."
Exception: Gates equipped with a locking device.
R326.4 Entrapment Avoidance - OUBCC Added. This section has been added to require suction outlets to comply with ANSI/APSP-7. This section has been added to read:
"R326.4 Entrapment Avoidance. Suction outlets shall be designed and installed in accordance with ANSI/APSP-7."
IRC 2015 Chapter 4 Foundations
R402.2 Concrete - OUBCC Amendatory. This section has been modified to include an exception for interior concrete slabs on grade and enclosed garage slabs to the requirement the concrete be air entrained. This section has been modified to read:
"R402.2 Concrete. Concrete shall have a minimum specified compressive strength of f'c, as shown in table R402.2. Concrete subject to moderate or severe weathering as indicated in table R301.2(1) shall be air entrained as specified in table R402.2. The maximum weight of fly ash, other pozzolans, silica fume, slag or blended cements that is included in concrete mixtures for garage floor slabs and for exterior porches, carport slabs, and steps that will be exposed to deicing chemicals shall not exceed the percentages of the total weight of the cementitious materials specified in section 19.3.3.4 of ACI 318. Materials used to produce concrete testing thereof shall comply with the applicable standards listed in chapters 19 and 20 of ACI 318 or ACI 332.
Exception: Interior concrete slabs on grade and enclosed garage slabs are not required to be air-entrained."
R402.2.2 Post-Tension Footings And Concrete Slabs - Bixby Added. This provision has been added by the city of Bixby to provide higher standards and requirements than established by the Oklahoma uniform building code commission to account for local soil conditions. This section has been added to read:
"R402.2.1 Post-Tension Footings And Concrete Slabs. Footings for post tension type reinforcement systems and concrete floor slabs shall be constructed as designed specifically for each structure by a registered engineer. Footings shall have a minimum of four (4) no. 4 (half- inch) steel bars for single story structures and four (4) no. 5 (five-eights-inch) steel bars for two-story structures. Vertical uprights shall have a minimum of one (1) no. 4 (half-inch) steel upright every two (2) feet and shall be long enough to be bent to a horizontal position for at least one (1) foot. Concrete slab reinforcement shall be designed using no less than no. 4 (half-inch) steel on a two (2) foot grid. A vapor barrier shall be required for all concrete slabs.
Exceptions:
      1.   Foundations and engineered soil systems designed by a registered engineer. Design documents, including the soil analysis, testing locations and soil compaction tests, shall be submitted for review and approval. Additional analysis and/or testing may be requested by the building official.
      2.   Accessory structures constructed on property zoned agriculture and intended solely for agricultural use.
      3.   Accessory structures smaller than four hundred (400) square feet.
      4.   Foundation systems for which the building official determines that none of the designs prescribed in this section are necessary due to structure size, use or nonconventional construction methods, the building official may waive these requirements, but in no instance shall the foundation system be less stringent than that required in the international residential code, 2015 edition."
Table R403.1(1) Minimum Width And Thickness For Concrete Footings For Light-Frame Construction (Inches) - OUBCC Amendatory. This table has been modified to strike footnote "b" from underneath the table. The footnote area at the bottom of the table has been amended to read:
"a. Interpolation allowed. Extrapolation is not allowed."
Table R403.1(2) Minimum Width And Thickness For Concrete Footings For Light-Frame Construction With Brick Veneer (Inches) - OUBCC Amendatory. This table has been modified to strike footnote "b" from underneath the table. The footnote area at the bottom of the table has been amended to read:
"a. Interpolation allowed. Extrapolation is not allowed."
Table R403.1(3) Minimum Width And Thickness For Concrete Footings With Cast-In-Place Concrete Or Fully Grouted Masonry Wall Construction (Inches) - OUBCC Amendatory. This table has been modified to strike footnote "b" from underneath the table. The footnote area at the bottom of the table has been amended to read:
"a. Interpolation allowed. Extrapolation is not allowed."
Figure R403.1(1) Plain Concrete Footings With Masonry And Concrete Stem Walls In SDC A, B, And C - OUBCC Amendatory. The figure heading has been amended to include a superscript "g" to indicate an associated footnote. The "notes" area at the bottom of this figure has been modified to add a note "g" to require reinforcement in the footings of structures in SDC A, B, and C. The "notes" at the bottom of the figure have been amended to read:
"a. See section 404.3 for sill requirements.
         b.   See section 403.1.6 for sill attachment.
         c.   See section R506.2.3 for vapor barrier requirements.
         d.   See section R403.1 for base.
         e.   See figure R403.1.3 for additional footing requirements for structures in SDC D0, D1, and D2 and townhouses in SDC C.
         f.   See section R408 for under-floor ventilation and access requirements.
         g.   Add two number four (4) rebar to all footings. Additionally all cold joints between footings and foundation walls (stem walls) shall be tied together by a number four (4) rebar at every corner and not to exceed 6 feet (1828 mm) o.c. with embedment of 12 inches (304 mm) into each footing and wall."
R403.1.1 Minimum Size - Bixby Amendatory. This provision has been modified by the city of Bixby to provide higher standards and requirements than established by the Oklahoma uniform building code commission to account for local soil conditions. This section has been modified to read:
"R403.1.1 Minimum Size. Subject to exceptions provided, the minimum size of concrete and masonry footings shall have a minimum width of sixteen inches (16"). Spread footings shall be at least six inches (6") (152 mm) in thickness, T, footing projections, P, shall be no less than two inches (2") (51 mm) and shall not exceed the thickness of the footing. Footing thickness and projection for fireplaces shall be in accordance with section R1001.2. The size of footings supporting piers and columns shall be based on the tributary load and allowable soil pressure in accordance with table R401.4.1. Footings for wood foundations shall be in accordance with the details set forth in section R403.2, and figures R403.1(2) and R403.1(3).
Exceptions:
Structures with wood floors not subject to the requirement in this section, that footings have a minimum width of sixteen inches (16") shall include:
      1.   Foundations and engineered soil systems designed by a registered engineer. Design documents, including the soil analysis, testing locations and soil compaction tests, shall be submitted for review and approval. Additional analysis and/or testing may be requested by the building official.
      2.   Accessory structures constructed on property zoned agriculture and intended solely for agricultural use.
      3.   Accessory structures smaller than four hundred (400) square feet.
      4.   Foundation systems for which the building official determines that none of the designs prescribed in this section are necessary due to structure size, use or nonconventional construction methods, the building official may waive these requirements, but in no instance shall the foundation system be less stringent than that required in the international residential code, 2015 edition."
R403.1.4 Minimum Depth - Bixby Amendatory. This provision has been modified by the city of Bixby to provide higher standards and requirements than established by the Oklahoma uniform building code commission to account for local soil conditions. This section has been modified to read:
"R403.1.4 Minimum Depth. Subject to exceptions provided, all concrete and masonry footings for structures with wood floors shall have a minimum depth of twenty-four inches (24") and penetrate a minimum of twelve inches (12") into undisturbed soil and below the frost level. All concrete and masonry footings for structures with concrete slab floors shall have a minimum depth of eighteen inches (18") into undisturbed soil and below the frost level. For all others, all exterior footings shall be placed at least twelve inches (12") (305 mm) below the undisturbed ground surface. Where applicable, the depth of footings shall also conform to sections R403.1.4.1 through R403.1.4.2.
Exceptions:
Structures with wood floors not subject to the requirements in this section that footings have a minimum depth of twenty-four inches (24") and penetrate a minimum of twelve inches (12") into undisturbed soil and below the frost level shall include:
      1.   Foundations and engineered soil systems designed by a registered engineer. Design documents, including the soil analysis, testing locations and soil compaction tests, shall be submitted for review and approval. Additional analysis and/or testing may be requested by the building official.
      2.   Accessory structures constructed on property zoned agriculture and intended solely for agricultural use.
      3.   Accessory structures smaller than four hundred (400) square feet.
      4.   Foundation systems for which the building official determines that none of the designs prescribed in this section are necessary due to structure size, use or nonconventional construction methods, the building official may waive these requirements, but in no instance shall the foundation system be less stringent than that required in the international residential code, 2015 edition."
R403.1.6 Foundation Anchorage - OUBCC Amendatory. This section has been modified to specify hand driven cut and concrete nails are not an approved fastener and include an exception for wood sole plates of braced wall panels anchorage under specific criteria. This section has been modified to read:
"R403.1.6 Foundation Anchorage. Wood sill plates and wood walls supported directly on continuous foundations shall be anchored to the foundation in accordance with this section.
Cold formed steel framing shall be anchored directly to the foundation or fastened to wood sill plates anchored to the foundation. Anchorage of cold-formed steel framing shall be in accordance with this section and section R505.3.1 or R603.3.1.
Wood sole plates at the exterior walls on monolithic slabs, wood sole plates of braced wall panels at building interiors on monolithic slabs and all wood sill plates shall be anchored to the foundation with minimum 1/2-inch- diameter (12.7 mm) anchor bolts spaced a maximum of 6 feet (1829 mm) on center or approved anchors or anchor straps spaced as required to provide equivalent anchorage to 1/2-inch-diameter (12.7 mm) anchor bolts. Bolts shall extend a minimum of 7 inches (178 mm) into concrete or grouted cells of concrete masonry units. The bolts shall be located in the middle third of the width of the plate. A nut and washer shall be tightened on each anchor bolt. There shall be a minimum of two bolts per plate section with one bolt located not more than 12 inches (305 mm) or less than seven bolt diameters from each end of the plate section. Interior bearing wall sole plates that are not part of a braced wall panel shall be positively anchored with approved fasteners. Hand driven cut or concrete nails are not approved fasteners. Sill plates and sole plates shall be protected against decay and termites where required by section R317 and R318.
Exceptions:
      1.   Walls 24 inches (610 mm) total length or shorter connecting offset braced wall panels shall be anchored to the foundation with a minimum of one anchor bolt located in the center third of the plate section and shall be attached to adjacent braced wall panels at corners as shown in item 9 of table R602.3(1).
      2.   Connection of walls 12 inches (305 mm) total length or shorter connecting offset braced wall panels to the foundation without anchor bolts shall be permitted. The wall shall be attached at corners as shown in item 9 of table R602.3(1).
      3.   Wood sole plates of braced wall panels at building interiors on monolithic slabs may be anchored using connector(s) with a shear capacity of 2300 pounds and a tensile capacity of 800 pounds over a maximum span of 6 feet."
R403.1.7.3 Foundation Elevation - OUBCC Deleted. This section has been stricken from the code.
R403.1.9 Protection Of Footings - OUBCC Amendatory. This section has been added to provide protection to footings when trenching work is needed. This section has been added to read:
"R403.1.9 Protection Of Footings. Trenching for work including but not limited to plumbing, electrical, storm shelters, and pools shall comply with this section. Trenching installed parallel to footings and walls shall not extend into the bearing plane of a footing wall. The upper boundary of the bearing plane is a line that extends downward, at an angle of 45 degrees from horizontal, from the outside bottom edge of the footing wall."
R406.2 Concrete And Masonry Foundation Waterproofing - OUBCC Amendatory. This section has been modified to include an additional option for waterproofing. This section has been modified to read:
"R406.2 Concrete And Masonry Foundation Waterproofing. In areas where a high water table or other severe soil-water conditions are known to exist, exterior foundation walls that retain earth and enclose interior spaces and floors below grade shall be water proofed from the higher of (a) the top of the footing or (b) 6 inches (152 mm) below the top of the basement floor, to the finished grade. Walls shall be waterproofed in accordance with one of the following:
      1.   Two-ply hot-mopped felts.
      2.   Fifty-five-pound (25 kg) roll roofing.
      3.   Six-mil (0.15 mm) polyvinyl chloride.
      4.   Six-mil (0.15 mm) polyethylene.
      5.   Forty-mil (1 mm) polymer-modified asphalt.
      6.   Sixty-mil (1.5 mm) flexible polymer cement.
      7.   One-eighth-inch (3 mm) cement-based, fiber-reinforced waterproof coating.
      8.   Sixty-mil (1.5 mm) solvent-free liquid-applied synthetic rubber.
      9.   Bentonite.
Exception: Organic-solvent-based products such as hydrocarbons, chlorinated hydrocarbons, ketones and esters shall not be used for ICF walls with expanded polystyrene form material. Use of plastic roofing cements, acrylic coatings, latex coatings, mortars, and pargings to seal ICF walls is permitted. Cold-setting asphalt or hot asphalt shall conform to type C of ASTM D 449. Hot asphalt shall be applied at a temperature of less than 200 degrees Fahrenheit (93 degrees Celsius).
All joints in membrane waterproofing shall be lapped and sealed with an adhesive compatible with the membrane.
IRC 2015 Chapter 5 Floors
R506.2.1 Fill - OUBCC Amendatory. This section has been modified to provide fill lift measurements and delete a requirement for the slab and stem wall system to be designed by accepted engineering practice/standards by a design professional. This section has been modified to read:
"R506.2.1 Fill. Fill material shall be free of vegetation and foreign material. The fill shall be compacted in 8 to 12 inch (203 mm to 305 mm) lifts to ensure uniform support of the slab, and except where approved, the fill depths shall not exceed 48 inches (1220 mm) for clean sand or gravel and 8 inches (203 mm) for earth."
R506.2.3 Vapor Retarder - OUBCC Amendatory. This section has been modified to allow for other industry accepted vapor retarders installed according to the manufacturer's specifications. This section has been modified to read:
"R506.2.3 Vapor Retarder. A 6 mil (0.006 inch; 152 micrometers) polyethylene sheeting, other industry accepted vapor retarder products installed per manufacturer specifications or approved vapor retarder with joints lapped not less than 6 inches (152 mm) shall be placed between the concrete floor slab and the base course or the prepared subgrade where no base course exists.
Exception: The vapor retarder is not required for the following:
      1.   Garages, utility buildings and other unheated accessory structures.
      2.   For unheated storage rooms having an area less than 70 square feet (6.5 square meters) and carports.
      3.   Driveways, walks, patios and other flatwork not likely to be enclosed and heated at a later date.
      4.   Where approved by the building official, based on local site conditions."
IRC 2015 Chapter 6 Wall Construction
Table R602.3(1) Fastening Schedule - OUBCC Amendatory. This table has been amended to add a footnote "a" to the table, applicable only to row 16 under the "Wall" section of the table after the words "Top or bottom plate to stud". This footnote has been added to read:
"a. When 7/16 inch structural sheathing is used with a minimum nailing spacing of 6 inches (152 mm) on the edge and 12 inches (305 mm) in the field, two- 3 inch x 0.131 inch nails are acceptable for end nail conditions for the top and bottom plate to stud connection."
Table R602.3(3) Requirements For Wood Structural Panel Wall Sheathing Used To Resist Wind Pressures a, b, c - OUBCC Amendatory. This table has been amended to add footnote "d" to the table heading to allow for alternative fasteners when certain criteria is met. The footnotes have been modified to read:
"a. Panel strength axis parallel or perpendicular to supports. Three-plywood sheathing with studs spaced more than 16 inches on center shall be applied with panel strength axis perpendicular to supports.
         b.   Table is based on wind pressures acting toward and away from building surfaces in accordance with section R301.2. Lateral bracing requirements shall be in accordance with section R602.10.
         c.   Wood structural panels with span ratings of wall-16 or wall-24 shall be permitted as an alternate to panels with a 24/0 span rating. Plywood siding rated at 16 o.c. or 24 o.c. shall be permitted as an alternate to panels with a 24/16 span rating. Wall-16 and plywood siding 16 o.c. shall be used with studs spaced not more than 16 inches on center.
         d.   The following alternative fasteners will be acceptable with a wind exposure category of C or D, 0.099 inch x 21/4 inches at 3 inches o.c. along the edge and 6 inches o.c. in the field. Or 0.113 inch x 23/8 inches at 6 inches o.c. along the edge and 12 inches o.c. in the field."
R602.7.5 Supports For Headers - OUBCC Amendatory. This section has been modified to provide an exception that clarifies the section applies only when the building eave height is above 22 feet (6705 mm). The section has been modified to read:
"R602.7.5 Supports For Headers. Headers shall be supported on each end with one or more jack studs or with approved framing anchors in accordance with table R602.7(1) or R602.7(2). The full-height stud adjacent to each end of the header shall be end nailed to each end of the header with four-16d nails (3.5 inches x 0.135 inch). The minimum number of full-height studs at each end of a header shall be in accordance with table R602.7.5.
Exception: This section only applies for buildings with eave heights above 22 feet (6705 mm)."
R602.10.5 Minimum Length Of A Braced Wall Panel - OUBCC Amendatory. This section has been modified to allow for the portal frame to begin at 121/2 feet (3810 mm) from the wall line end for CS-PF method. This section has been modified to read:
"R602.10.5 Minimum Length Of A Braced Wall Panel. The minimum length of a braced wall panel shall comply with table R602.10.5. For methods CS-WSP and CS-SFB, the minimum panel length shall be based on the adjacent clear opening height in accordance with table R602.10.5 and figure R602.10.5. Where a panel has an opening on either side of differing heights, the taller opening height shall be used to determine the panel length. For method CS-PF, it is permissible to begin the portal frame at 121/2 feet (3810 mm) from the wall line end."
R602.10.8 Braced Wall Panel Connections - OUBCC Amendatory. This section has been modified to include a fourth requirement to the section for anchoring wood sole plates to the building interiors on monolithic slabs using connectors with specific requirements. This section has been modified to read:
"R602.10.8 Braced Wall Panel Connections. Braced wall panels shall be connected to the floor framing or foundations as follows:
      1.   Where joists are perpendicular to a braced wall panel above or below, a rim joist, band joist or blocking shall be provided along the entire length of the braced wall panel in accordance with figure R602.10.8(1). Fastening of top and bottom wall plates to framing, rim joist, band joist and/or blocking shall be in accordance with table R602.3(1).
      2.   Where joists are parallel to a braced wall panel above or below, a rim joist, end joist or other parallel framing member shall be provided directly above and below the braced wall panel in accordance with figure R602.10.8(2). Where a parallel framing member cannot be located directly above and below the panel, full-depth blocking at 16-inches (406 mm) spacing shall be provided between parallel framing members to each side of the braced wall panel in accordance with figure R602.10.8(2). Fastening of blocking and wall plates shall be in accordance with table R602.3(1) and figure R602.10.8(2).
      3.   Connections of braced wall panels to concrete or masonry shall be in accordance with section R403.1.6.
      4.   Wood sole plates of braced wall panels at building interiors on monolithic slabs maybe anchored using connector(s) with a shear capacity of 2300 pounds and a tensile capacity of 800 pounds over a maximum span of 6 feet (1829 mm)."
R602.12 Simplified Wall Bracing - OUBCC Amendatory. This section has been modified to change wall height, roof eave height, and wind speed conditions. This section has been modified to read:
"R602.12 Simplified Wall Bracing. Buildings meeting all of the conditions listed below shall be permitted to be braced in accordance with this section as an alternate to the requirements of section R602.10. The entire building shall be braced in accordance with this section; the use of other bracing provisions of section R602.10, except as specified herein, shall not be permitted.
      1.   There shall be not more than three stories above the top of a concrete or masonry foundation or basement wall. Permanent wood foundations shall not be permitted.
      2.   Floors shall not cantilever more than 24 inches (610 mm) beyond the foundation or bearing wall below.
      3.   Wall height shall not be greater than 12 feet (3658 mm).
      4.   The building shall have a roof eave-to-ridge height of 20 feet (6096 mm) or less.
      5.   Exterior walls shall have gypsum board with a minimum thickness of 1/2 inch (12.7 mm) installed on the interior side fastened in accordance with table R702.3.5.
      6.   The structure shall be located where the ultimate design wind speed is less than or equal to 115 mph (51.4 m/s), and the exposure category is B or C.
      7.   The structure shall be located in seismic design category A, B, or C for detached one- and two-family dwellings or seismic design category A or B for townhouses.
      8.   Cripple walls shall not be permitted in three-story buildings."
R602.12.2 Sheathing Materials - OUBCC Amendatory. This section has been modified to change the minimum thickness of wood structural panels. This section has been modified to read:
"R602.12.2 Sheathing Materials. The following sheathing materials installed on the exterior side of exterior walls shall be used to construct a bracing unit as defined in section R602.12.3. Mixing materials is prohibited.
      1.   Wood structural panels with a minimum thickness of 7/16 inch (11.11 mm) fastened in accordance with table R602.3(3).
      2.   Structural fiberboard sheathing with a minimum thickness of 1/2 inch (12.7 mm) fastened in accordance with table R602.3(1)."
IRC 2015 Chapter 7 Wall Covering
R703.4 Flashing - OUBCC Amendatory. This section has been modified to clarify that 6-mil polyethylene sheeting is an approved corrosion-resistant flashing in certain circumstances and to clarify flashing above doors are not required where it is unlikely to have rain or other moisture accumulation occur above the door. This section has been modified to read:
"R703.4 Flashing. Approved corrosion-resistant flashing shall be applied shingle-fashion in a manner to prevent entry of water into the wall cavity or penetration of water to the building structural framing components. 6-mil polyethylene sheeting is an approved corrosion- resistant flashing when not exposed to UV rays. Self- adhered membranes used as flashing shall comply with AAMA 711. Fluid-applied membranes used as flashings in exterior walls shall comply with AAMA 714. The flashing shall extend to the surface of the exterior wall finish. Approved corrosion-resistant flashings shall be installed at the following locations:
      1.   Exterior window and door openings. Flashing at exterior window and door openings shall extend to the surface of the exterior wall finish or to the water- resistive barrier complying with section R703.2 for subsequent drainage. Mechanically attached flexible flashings shall comply with AAMA 712. Flashing at exterior window and door openings shall be installed in accordance with one or more of the following:
1.1 The fenestration manufacturer's installation instructions and flashing instructions, or for applications not addressed in the fenestration manufacturer's instructions in accordance with the flashing manufacturer's instructions. Where flashing instructions or details are not provided, flashing to be installed per 1.2, 1.3, 1.4 or, pan flashing shall be installed at the sill of exterior window and door openings. Pan flashing shall be sealed or sloped in such a manner as to direct water to the surface of the exterior wall finish or to the water-resistive barrier for subsequent drainage. Openings using pan flashing shall incorporate flashing or protection at the head and sides.
1.2 In accordance with the flashing design or method of a registered design professional.
1.3 In accordance with other approved methods.
1.4 Flashing above doors are not required where it is unlikely to have rain or other moisture accumulation occur above the door.
      2.   At the intersection of chimneys or other masonry construction with frame or stucco walls, with projecting lips on both sides under stucco copings.
      3.   Under and at the ends of masonry, wood or metal copings and sills.
      4.   Continuously above all projecting wood trim.
      5.   Where exterior porches, decks, or stairs attach to a wall or floor assembly of wood-frame construction.
      6.   At wall and roof intersections.
      7.   At built-in gutters.
Figure R703.8 Typical Masonry Veneer Wall Details - OUBCC Amendatory. This figure has been modified to add footnotes "f" and "g" to the footnote section and amend the figure heading to include a superscript "f" and "g" to indicate the associated footnotes. This figure's footnotes have been modified to read:
"a. See sections R703.8.5, R703.8.6, and R703.4.
         b.   See section R703.2 and R703.8.4.
         c.   See section R703.8.4.2 and table R703.8.4.
         d.   See section R703.8.3.
         e.   Figure R703.8 illustrates typical construction details for a masonry veneer wall. For the actual mandatory requirements of this code, see the indicated sections of text. Other details of masonry veneer wall construction shall be permitted provided the requirements of the indicated sections of text are met.
         f.   Flashing to be done per section R703.4, in accordance with a design from a registered design professional or in accordance with other approved methods or standard industry practices.
         g.   Flashing depicted under sill and above windows are not required with windows that have nailing flanges for their primary attachment. Flange type windows should be counter flashed into the weather resistant barrier or installed per section R703.4."
Figure R703.8.2.1 Exterior Masonry Veneer Support By Steel Angles - OUBCC Amendatory. This figure has been modified to add a footnote "a" to the figure heading with a superscript "a" to indicate an associate footnote. Footnote "a" has been added to read:
"a. Flashing to be done per section R703.4, in accordance with a design from a registered design professional or in accordance with other approved methods or standard industry practices."
Figure R703.8.2.2 Exterior Masonry Veneer Support By Roof Members - OUBCC Amendatory. This figure has been modified to add a footnote "a" to the figure heading with a superscript "a" to indicate an associate footnote. Footnote "a" has been added to read:
"a. Flashing to be done per section R703.4, in accordance with a design from a registered design professional or in accordance with other approved methods or standard industry practices."
R703.8.3.1 Allowable Span - OUBCC Amendatory. This section has been modified to provide guidance to builders using a typical for Oklahoma lintel. This section has been modified to read:
"R703.8.3.1 Allowable Span. The allowable span shall not exceed the values set forth in table R703.8.3.1. Additionally a 3 inches x 3 inches x 3/16 inch (76 mm x 76 mm x 4.8 mm) steel angle 6 feet (1829 mm) long may be used to support 3 vertical feet (914 mm) of masonry veneer and a 3 inches x 3 inches x 3/16 inch (76 mm x 76 mm x 4.8 mm) steel angle 5 feet (1524 mm) long may be used to support 41/4 vertical feet (1295 mm) of masonry veneer."
IRC 2015 Chapter 8 Roof-Ceiling Construction
R801.3 Roof Drainage - OUBCC Deleted. This section has been stricken from the code.
R802.3 Framing Details - OUBCC Amendatory. This section has been modified to change the ridge rafter requirements, provide a definition of a brace, and add an exception to the section. This section has been modified to read:
"R802.3 Framing Details.
      1.   Rafters shall be framed to ridge board or to each other with a gusset plate as a tie. Ridge board shall be either at least 1-inch (25 mm) nominal thickness and not less in depth than the cut end of the rafter or at least 2-inches (51 mm) nominal thickness and one size greater than the rafters attached to it.
      2.   Where a 1-inch (25 mm) nominal thickness ridge is used, all rafters shall be framed not more than 1.5 inches (38 mm) offset from each other at the ridge board or if no ridge is used they should be framed directly opposite from each other with a gusset plate as a tie. When a nominal 2-inch rafter is used they may be offset with no limitations. At all valleys and hips there shall be a valley or hip rafter not less than 2-inch (51 mm) nominal thickness and not less in depth than the cut end of the rafter. Hip and valley rafters shall be supported at the ridge by a brace to a bearing partition or beam or be designed to carry and distribute the specific load at that point.
      3.   Definition of brace includes:
3.1. A triangular configuration of framing members with a horizontal tie and rafter members,
3.2. King post or similar. Where the roof pitch is less than three units vertical in 12 units horizontal (25-percent slope), structural members that support rafters and ceiling joists, such as ridge beams, hips and valleys, shall be designed as beams.
Exception: This exception helps address many situations where due to the design, building bracing is not achievable. This exception shall read:
"The use of a "blind valley", also known as a "farmers valley" or "California valley" will be allowed. In this type of valley the main roof is framed as usual, it may or may not be sheathed, and the intersecting roof is framed on top of the main roof. The two valley plates or sleeps lie on top of the main roof rafters or sheathing and provide a nailing base for the jack rafters and ridge board of the intersecting roof."
R802.3.1 Ceiling Joist And Rafter Connections - OUBCC Amendatory. This section has been modified to reflect current framing practices. This section has been modified to read:
"R802.3.1 Ceiling Joists And Rafter Connections.
      1.   Ceiling joists and rafters shall be nailed to each other every 4 feet (1219 mm) on center in accordance with table R802.5.1(9), and the rafter shall be nailed to the top wall plate in accordance with table R602.3(1). Ceiling joists shall be continuously or securely joined in accordance with table R802.5.1(9) where they meet over interior partitions and are nailed to adjacent rafters to provide a continuous tie across the building where such joists are parallel to the rafters.
      2.   Where ceiling joists are not connected to the rafters at the top wall plate, joists connected higher in the attic shall be installed as rafter ties, or rafter ties shall be installed to provide a continuous tie. Where ceiling joists are not parallel to rafters, the rafter ties shall be installed every 4 feet (1219 mm) on center. Rafter ties shall be not less than 2 inches by 4 inches (51 mm by 102 mm) (nominal), installed in accordance with the connection requirements in table R802.5.1(9), or connections of equivalent capacities shall be provided. Where ceiling joists or rafter ties are not provided, the ridge formed by these rafters shall be supported by a wall, beam, or girder constructed in accordance with this code.
      3.   Collar ties or ridge straps to resist wind uplift shall be connected in the upper third of the attic space in accordance with table R602.3(1).
      4.   Collar ties shall be not less than 1 inch by 4 inches (25 mm by 102 mm) (nominal), spaced not more than 4 feet (1219 mm) on center."
R802.5 Allowable Rafter Spans - OUBCC Amendatory. This section has been modified to provide guidance for builders framing rafters above the top sill of the wall system and provide an exception to require collar ties to be sized not less than the required size of the rafters they are connected to. This section has been modified to read:
"R802.5 Allowable Rafter Spans. Spans for rafters shall be in accordance with tables R802.5.1(1) through R802.5.1(8). For other grades and species and for other loading conditions, refer to the AWCSTJR. The span of each rafter shall be measured along the horizontal projection of the rafter. The tabulated rafter spans in tables R802.5.1(1) through R802.5.1(8) assume ceiling joists are located at the bottom of the attic space or some other method of resisting the outward push of the rafters on the bearing walls, such as rafter ties is provided at that location. Where ceiling joists or rafter ties are located higher in the attic space, the rafter spans in these tables shall be multiplied by the following rafter reduction factors: Where ceiling joists or rafter ties are located at one third the span of the rafter the adjustment factor is 0.67, at one quarter of the span of the rafter the adjustment factor is 0.76, at one fifth of the span of the rafter the adjustment factor is 0.83, at one sixth of the span of the rafter, the adjustment factor is 0.90 and at two fifteenths of the rafter or less, there is no need for adjusting the rafter capacity.
Exception: Collar Ties. Installation of collar ties to reduce the span of the rafters is permitted as shown in figure R802.5.1. Collar ties shall be sized not less than the required size of the rafters they are connected to."
R802.5.1 Purlins - OUBCC Amendatory. This section has been modified to include an exception for spacing the braces at not more than 6 feet (1829 mm) when certain conditions are met. The section has been modified to read:
"R802.5.1 Purlins. Installation of purlins to reduce the span of rafters is permitted as shown in figure R802.5.1. Purlins shall be sized not less than the required size of the rafters that they support. Purlins shall be continuous and shall be supported by 2-inch by 4-inch (51 mm by 102 mm) braces installed to bearing walls at a slope not less than 45 degrees (0.79 rad) from the horizontal. The braces shall be spaced not more than 4 feet (1219 mm) on center and the unbraced length of the braces shall not exceed 8 feet (2438 mm).
Exception: Braces may be spaced not more than 6 feet (1829 mm) on center if:
      1.   The purlin brace is 2-inch by 6-inch (51 mm by 153 mm),
      2.   Purlins shall be sized one nominal size larger than the rafter they support, and
      3.   Unbraced length of braces shall not exceed 8 feet (2438 mm)."
R802.7.1.2 Ceiling Joist Taper Cut - OUBCC Amendatory. This section has been modified to include an exception to the section requirements for ceiling joists not carrying more than a 25 pound tributary load for limited attic storage. This section has been modified to read:
"R802.7.1.2 Ceiling Joists Taper Cut. Taper cuts at the ends of the ceiling joists shall not exceed one-fourth the depth of the member in accordance with figure R802.7.1.2.
Exception: For ceiling joists not carrying more than 25 pounds of tributary load (limited attic storage) then taper cut at end of joint may be able to be increased to D/2."
IRC 2015 Chapter 9 Roof Assemblies
R905.2.1 Sheathing Requirements - OUBCC Amendatory. This section has been modified to clarify solidly sheathed decking should be in accordance with section R803 or to the asphalt shingle manufacturer's installation instructions. This section has been modified to read:
"R905.2.1 Sheathing Requirements. Asphalt shingles shall be fastened to solidly sheathed decks in accordance with section R803 or to the asphalt shingles manufacturer's installation instructions."
R905.2.8.5 Drip Edge - OUBCC Amendatory. This section has been modified to add an exception to the section when certain criteria is met. This section has been modified to read:
"R905.2.8.5 Drip Edge. A drip edge shall be provided at eaves and rake edges of shingle roofs. Adjacent segments of drip edge shall be overlapped not less than 2 inches (51 mm). Drip edges shall extend not less than 1/4 inch (6.4 mm) below the roof sheathing and extend up back onto the roof deck not less than 2 inches (51 mm). Drip edges shall be mechanically fastened to the roof deck at not less than 12 inches (305 mm) o.c. with fasteners as specified in section R905.2.5. Underlayment shall be installed over the drip edge along eaves and under the underlayment along rake edges.
Exception: If a nominal 1 inch by 2 inch (25 mm by 51 mm) shingle mold is used, attached to the fascia and the starter course of shingles is extended a minimum of 1/4 inch (6.35 mm) and not more than 1 inch (25 mm) then a metal drip edge is not required."
R908.3.1.1 Roof Re-Cover - OUBCC Amendatory. This section has been modified to list a fourth condition for when a roof re- cover shall not be permitted. This section has been modified to read:
"R908.3.1.1 Roof Re-Cover. A roof re-cover shall not be permitted where any of the following conditions occur:
      1.   Where the existing roof or roof covering is water soaked or has deteriorated to the point that the existing roof or roof covering is not adequate as a base for additional roofing.
      2.   Where the existing roof covering is slate, clay, cement or asbestos-cement tile.
      3.   Where the existing roof has two or more applications of any type of roof covering.
      4.   Where the existing roof has one or more application of asphalt shingles additional applications of asphalt shingles shall not be permitted."
IRC 2015 Chapter 10 Chimneys And Fireplaces
R1005.7 Factory-Built Chimney Offsets - OUBCC Amendatory. This section has been modified to provide an exception for listed and labeled factory-built chimneys that are part of a fireplace and chimney assembly to be installed according to the manufacturer's installation instructions. This section has been modified to read:
"R1005.7 Factory-Built Chimney Offsets. Where a factory- built chimney assembly incorporates offsets, no part of the chimney shall be at an angle of more than 30 degrees (0.52 rad) from vertical at any point in the assembly and the chimney assembly shall not include more than four elbows.
Exception: Where chimneys are part of a listed and labeled factory-built fireplace they may be installed in accordance with the fireplace and chimney manufacturer's installation instructions."
IRC 2015 Chapter 11 Energy Efficiency
N1101.1 Scope - OUBCC Amendatory. This section has been modified to bring it in line with the corresponding section in the 2009 irc by adding an exception that existed in the 2009 version and by striking the "note" that appears underneath the section heading regarding which code the sections N1101.2 through N1105 were extracted from. This section has been modified to read:
"N1101.1 Scope. This chapter regulates the energy efficiency for the design and construction of buildings regulated by this code.
Exception: Portions of the building envelope that do not enclose conditioned space."
N1101.2 (R101.3) Intent - OUBCC Deleted. This section has been stricken from the code.
N1101.3 (R101.5.1) Compliance Materials - OUBCC Deleted. This section has been stricken from the code.
N1101.4 (R102.1.1) Above Code Programs - OUBCC Amendatory. This section has been modified to bring it in line with the corresponding section in the 2009 IRC by striking a portion of the section heading (R102.1.1), and by striking the language requiring mandatory requirements. This section has been modified to read:
"N1101.4 Above Code Programs. The building official or other authority having jurisdiction shall be permitted to deem a national, state, or local energy-efficiency program to exceed the energy efficiency required by this chapter. Buildings approved in writing by such an energy- efficiency program shall be considered in compliance with this chapter."
N1101.5 (R103.2) Information On Construction Documents - OUBCC Deleted. This section has been stricken from the code.
N1101.5.1 (R103.2.1) Thermal Envelope Depiction - OUBCC Deleted. This section has been stricken from the code.
N1101.6 (R202) Defined Terms - OUBCC Deleted. This section and all associated terms and definitions have been stricken from the code.
N1101.7 (R301.1) Climate Zones - OUBCC Deleted. This section has been stricken from the code.
N1101.7.1 (R301.2) Warm Humid Counties - OUBCC Amendatory. This section has been modified to bring it in line with the corresponding section in the 2009 IRC by striking a portion of the section heading (R301.2). This section has been modified to read:
"N1101.7.1 Warm Humid Counties. Warm humid counties are identified in table N1101.7 by an asterisk."
N1101.7.2 (R301.3) International Climate Zones - OUBCC Deleted. This section has been stricken from the code.
N1108 (R301.4) Tropical Climate Zone - OUBCC Deleted. This section has been stricken from the code.
Figure N1101.7 (R301.1) Climate Zones - OUBCC Amendatory. This figure has been modified to bring it in line with the corresponding section in the 2009 IRC by striking a portion of the figure heading, (R301.1). This figure heading has been modified to read:
"Figure N1101.7 Climate Zones."
Table N1101.7 (R301.1) Climate Zones, Moisture Regimes, And Warm-Humid Designations By State, County And Territory - OUBCC Amendatory. This table has been modified to bring it in line with the corresponding table in the 2009 IRC by striking a portion of the table heading, (R301.1) and by striking all states, counties and territories other than the state and counties of the state of Oklahoma. This table heading has been modified to read:
"Table N1101.7 Climate Zones, Moisture Regimes, And Warm- Humid Designations By State, County And Territory."
Table N1101.7.2(1) [R302.3.(1)] International Climate Zone Definitions - OUBCC Deleted. This table has been stricken from the code.
Table N1101.7.2(2) [R301.3(2)] International Climate Zone Definitions - OUBCC Deleted. This table has been stricken from the code.
N1101.9 (R302.1) Interior Design Conditions - OUBCC Deleted. This section has been stricken from the code.
N1101.10 (R303.1) Identification - OUBCC Amendatory. This section has been modified to bring it in line with the corresponding section in the 2009 IRC by striking a portion of the section heading (R303.1), and by requiring compliance with the chapter instead of the code. This section has been modified to read:
"N1101.10 Identification. Materials, systems and equipment shall be identified in a manner that will allow a determination of compliance with the applicable provisions of this chapter."
N1101.10.1 (R303.1.1) Building Thermal Envelope Insulation - OUBCC Amendatory. This section has been modified to bring it in line with the corresponding section of the 2009 IRC by deleting a portion of the section heading (R303.1.1), and by replacing the words "greater in width" with "or more wide", "insulated siding" with "sprayed polyurethane foam (SPF) insulation", certification" with "certificate" in the last two sentences, and by adding wording regarding the installed thickness of sprayed polyurethane foam. This section has been modified to read:
"N1101.10.1 Building Thermal Envelope Insulation. An R-value identification mark shall be applied by the manufacturer to each piece of building thermal envelope insulation 12 inches (305 mm) or more wide. Alternately, the insulation installers shall provide a certification listing the type, manufacturer and R-value of the insulation installed in each element of the building thermal envelope. For blown or sprayed insulation (fiberglass and cellulose), the initial installed thickness, settled thickness, settled R-value, installed density, coverage area and number of bags installed shall be listed on the certification. For sprayed polyurethane foam (SPF) insulation, the installed thickness of the area covered and R-value of installed thickness shall be listed on the certificate. The insulation installer shall sign, date and post the certificate in a conspicuous location on the job site."
N1101.10.1.1 (R303.1.1.1) Blown Or Sprayed Roof/Ceiling Insulation - OUBCC Amendatory. This section has been modified to bring it in line with the corresponding section of the 2009 IRC by deleting a portion of the section heading (R303.1.1.1), and by replacing the wording "in height with "high", and "certification" with "certificate." This section has been modified to read:
"N1101.10.1.1 Blown Or Sprayed Roof/Ceiling Insulation. The thickness of blown-in or sprayed roof/ceiling insulation (fiberglass or cellulose) shall be written in inches (mm) on markers that are installed at least once for every 300 square feet (28 square meters) throughout the attic space. The markers shall be affixed to the trusses or joists and marked with a minimum initial installed thickness with numbers not less than 1 inch (25 mm) high. Each marker shall face the attic access opening. Spray polyurethane foam thickness and installed R-value shall be listed on the certificate provided by the insulation installer."
N1101.10.2 (R303.1.2) Insulation Mark Installation - OUBCC Amendatory. This section has been modified to bring it in line with the corresponding section of the 2009 IRC by deleting a portion of the section heading (R303.1.2). This section has been modified to read:
"N1101.10.2 Insulation Mark Installation. Insulating materials shall be installed such that the manufacturer's R-value mark is readily observable upon inspection."
N1101.10.3 (R303.1.3) Fenestration Product Rating - OUBCC Amendatory. This section has been modified to bring it in line with the corresponding section in the 2009 IRC by deleting a portion of the section heading (R303.1.3), and by striking the exception and striking a requirement for visual transmittance. This section has been modified to read:
"N1101.10.3 Fenestration Product Rating. U-factors of fenestration products (windows, doors, and skylights) shall be determined in accordance with NFRC 100 by an accredited, independent laboratory, and labeled and certified by the manufacturer. Products lacking such a labeled U-factor shall be assigned a default U-factor from table N1101.10.3(1) or N1101.10.3(2). The solar heat gain coefficient (SHGC) of glazed fenestration products (windows, glazed doors and skylights) shall be determined in accordance with NFRC 200 by an accredited, independent laboratory, and labeled and certified by the manufacturer. Products lacking such a labeled SHGC shall be assigned a default SHGC from table N1101.10.3(3)."
Table N1101.10.3(1) [R303.1.3(1)] Default Glazed Fenestration U-Factors - OUBCC Amendatory. This table heading has been modified to bring it in line with corresponding section in the 2009 IRC by striking a portion of the table heading [R303.1.3(1)]. This table heading has been modified to read:
"Table N1101.10.3(1) Default Glazed Fenestration U-Factors."
Table N1101.10.3(2) [R303.1.3(2)] Default Door U-Factors - OUBCC Amendatory. This table heading has been modified to bring it in line with corresponding section in the 2009 IRC by striking a portion of the table heading [R303.1.3(2)]. This table heading has been modified to read:
"Table N1101.10.3(2) Default Door U-Factors."
Table N1101.10.3(3) [R303.1.3(3)] Default Glazed Fenestration SHGC And VT - OUBCC Amendatory. This table heading has been modified to bring it in line with corresponding section in the 2009 IRC by striking a portion of the table heading [R303.1.3(3)], and by striking all references to VT from the table and heading. This table has been modified to read: "N1101.10.3(3) Default Glazed Fenestration SHGC." The second row of the table, entitled "VT" has been stricken.
   TABLE N1101.10.3(3)
   DEFAULT GLAZED FENESTRATION SHGC
 
Single Glazed
Double Glazed
Glazed Block
Clear
Tinted
Clear
Tinted
SHGC
0.8
0.7
0.7
0.6
0.6
 
N1101.10.4 (R303.1.4) Insulation Product Rating - OUBCC Amendatory. This section has been modified to bring it in line with corresponding section in the 2009 IRC by striking a portion of the section heading (R303.1.4) and by striking language in reference to clarifying a requirement to the U.S. federal trade commission R-value rule. This section has been modified to read:
"N1101.10.4 Insulation Product Rating. The thermal resistance (R-value) of insulation shall be determined in accordance with the CFR title 16, part 460 in units of h x square foot x Fahrenheit/btu at a mean temperature of 75 degrees Fahrenheit (24 degrees Celsius)."
N1101.10.4.1 (R303.1.4.1) Insulated Siding - OUBCC Deleted. This section has been stricken from the code.
N1101.11 (R303.2) Installation - OUBCC Amendatory. This section has been modified to bring it in line with the corresponding section in the 2009 IRC by striking a portion of the section heading (R303.2), and by requiring installation of all materials, systems and equipment meet the manufacturer's installation instructions and the provisions of the code. This section has been modified to read:
"N1101.11 Installation. All materials, systems and equipment shall be installed in accordance with the manufacturer's instructions and the provisions of this code."
N1101.11.1 (R303.2.1) Protection Of Exposed Foundation Installation - OUBCC Amendatory. This section has been modified to bring it in line with the corresponding section of the 2009 IRC by deleting a portion of the section heading, (R303.2.1). This section has been modified to read:
"N1101.11.1 Protection Of Exposed Foundation Installation. Insulation applied to the exterior basement walls, crawlspace walls, and the perimeter of slab-on- grade floors shall have a rigid, opaque and weather- resistance protective covering to prevent the degradation of the insulation's thermal performance. The protective covering shall cover the exposed exterior insulation and extend not less than 6 inches (153 mm) below grade."
N1101.12 (R303.3) Maintenance Information - OUBCC Deleted. This section has been stricken from the code.
N1101.13 (R401.2) Compliance - OUBCC Amendatory. This section has been modified to bring it in line with the corresponding section of the 2009 IRC by deleting a portion of the section heading (R401.2) and by deleting all the requirements listed in the 2015 edition for this section and adding the compliance provisions from 2009 edition for this section. This section has been modified to read:
"N1101.13 Compliance. Compliance shall be demonstrated by either meeting the requirements of the 2009 international energy conservation code or meeting the requirements of this chapter. Climate zones from figure N1101.7 or table 1101.7 shall be used in determining the applicable requirements from this chapter."
N1101.13.1 (R401.2.1) Tropical Zone - OUBCC Deleted. This section has been stricken from the code.
N1101.14 (R401.3) Certificate (Mandatory) - OUBCC Moved. This section has been moved to the newly created appendix W, entitled "Appendix W, Energy Efficiency" and is not adopted as a part of the statewide minimum code for residential construction within the state of Oklahoma. This section has been renumbered in appendix W to become W101.1. The section number N1101.14 itself, will stay as part of the code for numbering alignment but will not have any requirements attached to it.
N1102.1 (R402.1) General (Prescriptive) - OUBCC Deleted. This section, including the exception has been stricken from the code.
N1102.1.1 (R402.1.1) Vapor Retarder - OUBCC Deleted. This section has been stricken from the code.
N1102.1.2 (R402.1.2) Insulation And Fenestration Criteria - OUBCC Amendatory. This section has been modified to bring it in line with the corresponding section of the 2009 IRC by deleting a portion of the section heading (R402.1.2). This section has been modified to read:
"N1102.1.2 Insulation And Fenestration Criteria. The building thermal envelope shall meet the requirements of table N1102.1.2 based on the climate zone specified in section N1101.7."
N1102.1.3 (R402.1.3) R-Value Computation - OUBCC Amendatory. This section has been modified to bring it in line with the corresponding section of the 2009 IRC by deleting a portion of the section heading (R402.1.3), and by striking a requirement for reducing the manufacturer's labeled R-value on insulated siding. This section has been modified to read:
"N1102.1.3 R-Value Computation. Insulation material used in layers, such as framing cavity insulation, and insulation sheathing, shall be summed to compute the component R-value. The manufacturer's settled R-value shall be used for blown insulation. Computed R-values shall not include an R-value for other building materials or air films."
Table N1102.1.2 (R402.1.2) Insulation And Fenestration Requirements By Component - OUBCC Amendatory. This table has been modified to bring it in line with corresponding table in the 2009 IRC by striking a portion of the table heading (R402.1.2), and by striking specific rows and by editing and adding to the footnotes at the end of the table. The table has been modified to read: "Table N1102.1.2 Insulation And Fenestration Requirements By Component. At the end of the table heading is a superscript "a" and a superscript "m" to indicate associated footnotes. The table description with modifications, is listed below:
      1.   The table has eight rows with eleven columns. The first row is a header with the following header columns: "Climate Zone", "Fenestration U-Factor" (with a superscript "b" to indicate a footnote), "Skylight U-Factor" (with a superscript "b" to indicate a footnote), "Glazed Fenestration SHGC" (with the subscript "b" and "e" footnote indications stricken), "Ceiling R-Value", "Wood Frame Wall R-Value", "Mass Wall R-Value" (with a superscript "i" to indicate a footnote), "Floor R-Value", "Basement Wall R-Value" (with a superscript "c" to indicate a footnote), Slab R-Value And Depth (with a superscript "d" to indicate a footnote), and Crawl Space Wall R-Value (with a superscript "c" to indicate a footnote).
      2.   The second and third rows, entitled "1" and "2" under the first column header "Climate Zone" and continuing across all column headings have been stricken from the table.
      3.   The fourth row, entitled "3" under the first column header "Climate Zone" has been modified in specific column headers listed below:
3.1 Under column header "Fenestration U-Factor," the requirement has been changed from "0.35" to "0.40" with a "superscript "i" to indicate an associated footnote.
3.2 Under column header "Glazed Fenestration SHGC," the requirement has been changed from "0.25" to "0.35" with superscript letters "e" and "j" added to indicate associated footnotes.
3.3 Under column header "Ceiling R-Value," the requirement has been changed from "38" to "30."
3.4 Under column header "Wood Frame Wall R-Value," the requirement has been changed from "20 or 13 + 5h" to "13."
3.5 Under the column header "Slab R-Value And Depth" a superscript "l" has been added to indicate an associated footnote.
      4.   The fifth row, entitled "4 except marine" under the first column header "Climate Zone" has been modified in specific column headers listed below:
4.1 Under column header "Skylight U-Factor," the requirement has been changed from "0.55" to "0.60."
4.2 Under column header "Glazed Fenestration SHGC," the requirement has been changed from "0.40" to "NR."
4.3 Under column header "Ceiling R-Value," the requirement has been changed from "49" to "38."
4.4 Under column header "Wood Frame Wall R-Value," the requirement has been changed from "20 or 13 +5h" to "13."
4.5 Under column header "Mass Wall R-Value" the requirement has been changed from "8/13" to "5/10."
      5.   The sixth, seventh, and eighth rows, entitled "5 and marine 4", "6," and "7 and 8" respectively, under the first column heading "Climate Zone" and continuing across all column headings have been stricken from the table.
      6.   Footnote "a." has been modified to read:
R-values are minimums. U-factors and SHGC are maximums, R-19 batts compressed into nominal 2 x 6 framing cavity such that the R-value is reduced by R-1 or more shall be marked with the compressed R-value in addition to the full thickness R-value.
      7.   Footnote "b." has been modified to read:
"The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration."
      8.   Footnote "c." has been modified to read:
The first R-value applies to continuous insulation, the second to framing cavity insulation; either insulation meets the requirement.
      9.   Footnote "d." R-5 shall be added to the required slab edge R-values for heated slabs. Insulation depth shall be the depth of the footing or 2 feet, whichever is less, in zones 1 through 3 for heated slabs.
      10.   Footnote "e." There are no SHGC requirements in the marine zone.
      11.   Footnote "f." Basement wall insulation is not required in warm-humid locations as defined by figure N1101.7 and table N1101.7.
      12.   Footnote "g." Or insulation sufficient to fill the framing cavity, R-19 minimum.
      13.   Footnote "h." has been modified to read:
"13 + 5" means R-13 cavity insulation plus R-5 insulated sheathing. If structural sheathing covers 25 percent or less of the exterior, R-5 sheathing is not required where structural sheathing is used. If structural sheathing covers more than 25 percent of the exterior, structural sheathing shall be supplemented with insulated sheathing of at least R-2."
      14.   Footnote "i." has been modified to read:
"For impact-rated fenestration complying with section R301.2.1.2, the maximum U-factor shall be 0.75 in zone 2 and 0.65 in zone 3."
      15.   A new footnote "j." has been added to read:
For impact-resistant fenestration complying with section R301.2.1.2 of the 2015 international residential code, the maximum SHGC shall be 0.40.
      16.   The previously labeled footnote "i." has been renamed to "k." and has been modified to read as follows:
"The second R-value applies when more than half the insulation is on the interior."
      17.   A new footnote "l" has been added to read:
"If foundation/slab insulation is used and slab ledge exists 1/2 inch insulation in vertical position is allowed as thermal break between slab edge and foundation wall so that slab can still bear on horizontal ledge."
      18.   A new footnote "m" has been added to read:
"In addition to the requirements in table N1102.1.2, one of the following improvements are required:
18.1 Fenestration U-factors to be 0.35.
18.2 Wood frame wall R-value to be R15.
18.3 Slab R-value and depth to be 5.2 feet.
18.4 Ceiling R-value to be R38.
Exception: If duct testing is performed and passed in accordance with N1103.3.2 by either the post- construction test or rough-in test no further upgrade is required from the values in table N1102.1.2."
   TABLE N1102.1.2
   INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT
 
Climate Zone
Fenestration U-Factor b
Skylight U-Factorb
Glazed Fenestration SHGC
Ceiling R-Value
Wood Frame Wall R-Value
Mass Wall R-Valuei
Floor R-Value
Basementc Wall R-Value
Slabd R-Value & Depth
Crawl Spacec Wall R-Value
3
0.40i
0.55
0.35e,j
30
13
8/13
19
5/13f
0l
5/13
4 except marine
0.35
0.60
NR
38
13
5/10
19
10/13
10, 2 ft
10/13
 
         a.      R-values are minimums. U-factors and SHGC are maximums, R-19 batts compressed into nominal 2 x 6 framing cavity such that the R-value is reduced by R-1 or more shall be marked with compressed R-value in addition to the full thickness R-value.
         b.      The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration.
         c.      The first R-value applies to continuous insulation, the second to framing cavity insulation; either insulation meets the requirement.
         d.      R-5 shall be added to the required slab edge R-values for heated slabs. Insulation depth shall be the depth of the footing or 2 feet, whichever is less, in zones 1 through 3 for heated slabs.
         e.      There are no SHGC requirements in the marine zone.
         f.      Basement wall insulation is not required in warm-humid locations defined by figure N1101.7 and table N1101.7.
         g.      Or insulation sufficient to fill the framing cavity, R-19 minimum.
         h.      13 + 5 means R-13 cavity insulation plus R-5 insulated sheathing. If structural sheathing covers 25 percent or less of the exterior, R-5 sheathing is not required where structural sheathing is used. If structural sheathing covers more than 25 percent of the exterior, structural sheathing shall be supplemented with insulated sheathing of at least R-2.
         i.      For impact-rated fenestration complying with section R301.2.1.2, the maximum U-factor shall be 0.75 in zone 2 and 0.65 in zone 3.
         j.      For impact-resistant fenestration complying with section R301.2.1.2 of the 2015 international residential code, the maximum SHGC shall be 0.40.
         k.      The second R-value applies when more than half the insulation is on the interior.
         l.      If foundation/slab insulation is used and slab ledge exists 1/2 inch insulation in vertical position is allowed as thermal break between slab edge and foundation wall so that slab can still bear on the horizontal ledge.
         m.      In addition to the requirements in table N1102.1.2, one of the following improvements are required: fenestration U-factors to be 0.35; wood frame wall R-value to be R15; slab R-value and depth to be 5.2 feet; ceiling R-value to be R38. Exception: If duct testing is performed and passed in accordance with N1103.3.2 by either the post-construction test or rough-in test no further upgrade is required from the values in table N1102.1.2.
Table N1102.1.4 (R402.1.4) Equivalent U-Factors - OUBCC Amendatory. This table has been modified to bring it in line with corresponding table in the 2009 IRC by striking a portion of the table heading (R402.1.4), and by striking specific rows and by editing the footnotes at the end of the table. The table has been modified to read: "Table N1102.1.4 Equivalent U-Factors." At the end of the table heading is a superscript "a" to indicate an associated footnote. The table description with modifications, is listed below:
      1.   The table has eight rows with nine columns. The first row is a header with the following header columns: "Climate Zone", "Fenestration U-Factor", "Skylight U-Factor", "Ceiling U-Factor", "Frame Wall U-Factor", "Mass Wall U-Factor" (with a superscript "b" to indicate an associated footnote), "Floor U-Factor", "Basement Wall U-Factor", and "Crawl Space Wall U-Factor."
      2.   The second and third rows, entitled "1" and "2" under the column heading "Climate Zone" and continuing across all column headings, have been stricken from the code.
      3.   The fourth row, entitled "3" under the column heading "Climate Zone" has been modified in the subsequent columns as listed below:
3.1 Under column heading "Fenestration U-Factor" the requirement has been changed from "0.35" to "0.50."
3.2 Under column heading "Skylight U-Factor" the requirement has been changed from "0.55" to "0.65."
3.3 Under column heading "Ceiling U-Factor" the requirement has been changed from "0.030" to "0.035."
3.4 Under column heading "Frame Wall U-Factor" the requirement has been changed from "0.060" to "0.082."
3.5 Under column heading "Mass Wall U-Factor" the requirement has been changed from "0.098" to "0.141."
      4.   The fifth row, entitled "4 except marine" under the column heading "Climate Zone" has been modified in the subsequent columns as listed below:
4.1 Under column heading "Skylight U-Factor" the requirement has been changed from "0.55" to "0.60."
4.2 Under the column heading "Ceiling U-Factor" the requirement has been changed from "0.026" to "0.030."
4.3 Under the column heading "Frame Wall U-Factor" the requirement has been changed from "0.060" to "0.082."
4.4 Under the column heading "Mass Wall U-Factor" the requirement has been changed from "0.098" to "0.141."
      5.   The sixth, seventh, and eighth rows, entitled "5 and marine 4", "6", and "7 and 8" respectively, under column heading "Climate Zone" and continuing across all subsequent columns, have been stricken from the table.
      6.   Footnote "a" reads as:
"Nonfenestration U-factors shall be obtained from measurements, calculation or an approved source."
      7.   Footnote "b" has been modified to read:
"When more than half the insulation is on the interior, the mass wall U-factors shall be a maximum of 0.17 in zone 1, 0.14 in zone 2, 0.12 in zone 3, 0.10 in zone 4 except marine, and the same as the frame wall U-factor in marine zone 4 and in zones 5 through 8."
      8.   Footnote "c." has been modified to read:
"Basement wall U-factor of 0.360 in warm-humid locations as defined by figure N1101.7 and table N1101.7."
   TABLE N1102.1.4
   EQUIVALENT U-FACTORSa
 
Climate Zone
Fenestratio n U-Factor
Skylight U-Factor
Ceiling U-Factor
Frame Wall U-Factor
Mass Wall U-Factor b
Floor U-Factor
Basement Wall U-Factor
Crawl Space Wall U-Factor
3
0.50
0.65
0.035
0.082
0.141
0.064
0.360
0.477
4 except marine
0.35
0.60
0.030
0.082
0.141
0.047
0.059
0.065
 
         a.      Nonfenestration U-factors shall be obtained from measurements, calculation or an approved source.
         b.      When more than half the insulation is on the interior, the mass wall U-factors shall be a maximum of 0.17 in zone 1, 0.14 in zone 2, 0.12 in zone 3, 0.10 in zone 4 except marine, and the same as all the frame wall U-factor in marine zone 4 and zones 5 through 8.
         c.      Basement wall U-factor of 0.360 in warm-humid locations as defined by figure N1101.7 and table N1101.7.
N1102.1.4 (R402.1.4) U-Factor Alternative - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section heading (R402.1.4). This section has been modified to read:
"N1102.1.4 U-Factor Alternative. An assembly with a U-factor equal to or less than that specified in table N1102.1.4 shall be permitted as an alternative to the R-value in table N1102.1.2."
N1102.1.5 (R402.1.5) Total UA Alternative - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section heading (R402.1.5). This section has been modified to read:
"N1102.1.5 Total UA Alternative. If the total building thermal envelope UA (sum of U-factor times assembly area) is less than or equal to the total UA resulting from using the U-factors in table 1102.1.4 (multiplied by the same assembly area as in the proposed building), the building shall be considered in compliance with table N1102.1.2. The UA calculation shall be done using a method consistent with the ASHRAE Handbook Of Fundamentals and shall include the thermal bridging effects of framing materials. The SHGC requirements shall be met in addition to UA compliance."
N1102.2 (R402.2) Specific Insulation Requirements (Prescriptive) - OUBCC Amendatory. This section has been modified to bring it in alignment with the corresponding section in the 2009 IRC by striking portions of the section heading (R402.2) and (Prescriptive), and by striking the language associated with the section, leaving only the section title. This section has been modified to read:
"N1102.2 Specific Insulation Requirements."
N1102.2.1 (R402.2.1) Ceilings With Attic Spaces - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section heading (R402.2.1), and by modifying a reference in the section and striking certain other portions of the section. This section has been modified to read:
"N1102.2.1 Ceilings With Attic Spaces. Where section N1102.1.2 would require R-38 in the ceiling, R-30 shall be deemed to satisfy the requirement for R-38 wherever the full height of uncompressed R-30 insulation extends over the wall top plate at the eaves. Similarly, R-38 shall be deemed to satisfy the requirement for R-49 insulation wherever the full height of uncompressed R-38 insulation extends over the wall top plate at the eaves. This reduction shall not apply to the U-factor alternative approach in section R1102.1.4 and the total UA alternative in section R1102.1.5."
N1102.2.2 (R402.2.2) Ceilings Without Attic Spaces - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section heading (R402.2.2), and by adding clarifying language when the roof/ceiling assembly does not allow sufficient space for the required insulation. This section has been modified to read:
"N1102.2.2 Ceilings Without Attic Spaces. Where section N1102.1.2 would require insulation levels above R-30 and the design of the roof/ceiling assembly does not allow sufficient space for the required insulation, the minimum required insulation for such roof/ceiling assemblies shall be R-30. This reduction of insulation from the requirements of section N1102.1.2 shall be limited to 500 square feet (46 square meters) or 20 percent of the total insulated ceiling area, whichever is less. Where section N1102.1 would require insulation level R-30 and the design of the roof/ceiling assembly does not allow sufficient space for the required insulation, the minimum required insulation for such roof/ceiling assemblies shall be R-19. This reduction of insulation from the requirements of section N1102.1 shall be limited to 500 square feet (46 square meters) or 20 percent of the total insulated ceiling area, whichever is less."
N1102.2.3 (R402.2.3) Eave Baffle - OUBCC Deleted. This section has been stricken from the code.
N1102.2.4 (R402.2.4) Access Hatches And Doors - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section heading (R402.2.4), and deleting the exception to the section. This section has been modified to read:
"N1102.2.4 Access Hatches And Doors. Access doors from conditioned spaces to unconditioned spaces such as attics and crawl spaces shall be weather-stripped and insulated to a level equivalent to the insulation on the surrounding surfaces. Access shall be provided to all equipment that prevents damaging or compressing the insulation. A wood-framed or equivalent baffle or retainer is required to be provided when loose-fill insulation is installed, the purpose of which is to prevent the loose-fill insulation from spilling into the living space when the attic is opened, and to provide a permanent means of maintaining the installed R-value of the loose-fill insulation."
N1102.2.5 (R402.2.5) Mass Walls - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section heading (R402.2.5), and striking a requirement for other walls having a heat capacity greater than or equal to 6 btu divided by square feet times Fahrenheit (123 kJ divided by square meters times K). This section has been modified to read:
"N1102.2.5 Mass Walls. Mass walls for the purposes of this chapter shall be considered above-grade walls of concrete block, concrete, insulated concrete form (ICF), masonry cavity, brick (other than brick veneer), earth (adobe, compressed earth block, rammed earth) and solid timber/logs."
N1102.2.6 (R402.2.6) Steel-Frame Ceilings, Walls, And Floors - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section heading (R402.2.26), and by adding an exception for the reduction continuous insulation requirements in table N1102.2.6 for climate zones 1 and 2 when certain conditions are met. This section has been modified to read:
"N1102.2.6 Steel-Frame Ceilings, Walls, And Floors. Steel-frame ceilings, walls, and floors shall meet the insulation requirements of table N1102.2.6 or shall meet the U-factor requirements of table N1102.1.4. The calculation of the U-factor for a steel-frame envelope assembly shall use a series-parallel path calculation method.
Exception: In climate zones 1 and 2, the continuous insulation requirements in table N1102.2.6 shall be permitted to be reduced to R-3 for steel frame wall assemblies with studs spaced at 24 inches (610 mm) on center."
N1102.2.7 (R402.2.7) Walls With Partial Structural Sheathing - OUBCC Deleted. This section has been stricken from the code.
N1102.2.8 (R402.2.8) Floors - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section heading (R402.2.8), and striking an exception to the section. This section has been modified to read:
"N1102.2.8 Floors. Floor framing cavity insulation shall be installed to maintain permanent contact with the underside of the subfloor decking."
N1102.2.9 (R402.2.9) Basement Walls - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section heading (R402.2.9), and by making the requirement applicable to the exterior walls of the basement. This section has been modified to read:
"N1102.2.9 Basement Walls. Exterior walls associated with conditioned basements shall be insulated from the top of the basement wall down to 10 feet (3048 mm) below grade or to the basement floor, whichever is less. Walls associated with unconditioned basements shall meet this requirement unless the floor overhead is insulated in accordance with sections N1102.1.2 and N1102.2.8."
Table N1102.2.6 (R402.2.6) Steel-Frame Ceiling, Wall And Floor Insulation (R-Value) - OUBCC Amendatory. This table has been modified to bring it into alignment with the corresponding table in the 2009 IRC by striking a portion of the table heading (R402.2.6), and by editing specific rows. The table heading has been modified to read: "Table N1102.2.6 Steel- Frame Ceiling, Wall And Floor Insulation (R-Value)." The table description with modifications, is listed below:
      1.   The table has two columns and 23 rows. The first row contains the column headings: "Wood Frame R-Value Requirement" and "Cold-Formed Steel Equivalent R-Value" (with a superscript "a" to indicate an associated footnote. The table is divided into five sub-categories:
1.1 Steel Truss Ceilings (with a superscript "b" to indicate an associated footnote). Under this sub heading there are three rows for values R-30, R-38, and R-49. No modifications have been made to this sub-category.
1.2 Steel Joist Ceilings (with a superscript "b" to indicate an associated footnote). Under this subheading there are two rows for values R-30 and R-38. No modifications have been made to sub-category.
1.3 Steel Frame Wall, 16 Inches On Center. This subheading has been modified to strike the "16 inches on center" portion of the heading. Under the subheading there are five rows for R-values that have been further modified. See section 2 for those modifications.
1.4 Steel Frame Wall, 24 Inches On Center. This subheading has been modified to strike the "24 inches on center" portion of the heading and to delete all the requirements in this sub-category.
1.5 Steel Joist Floor. Under this subheading there are two rows for R-values R-13 and R-19. Both rows have been modified. See section 3 for those modifications.
      2.   Steel Frame Wall modifications. This subsection has five rows that have been modified.
2.1 Row "R-13." This row has been modified to strike the associated items under the column entitled "Cold-Formed Steel Equivalents" and replace them with: R-13 + 5 or R-15 +4 or R-21 + 3 or R-0 +10.
2.2 Row "R-13 +3." This row has been stricken from the table.
2.3 Row "R-20." This row title and the associated items under the column entitled "Cold-Formed Steel Equivalents" have been stricken from the table and replaced with the row title "R-19" and with the associated items under the column entitled "Cold-Formed Steel Equivalents" as R-13 +9 or R-19 +8 or R-25 +7.
2.4 Row "R-20 +5." This row has been stricken from the table.
2.5 Row "R-21" This row has been modified to strike the associated items under the column entitled "Cold-Formed Steel Equivalents" and replace them with R-13 +10 or R-19 + 9 or R-25 + 8.
      3.   Steel Joist Floor. This subsection has two rows which have been modified as follows:
3.1 Row "R-13." The associated items under the column entitled "Cold-Formed Steel Equivalents" have been modified to read: "R-19 in 2 x 6, R-19 + R-6 in 2 x 8 or 2 x 10."
3.2 Row "R-19." The associated items under the column entitled "Cold-Formed Steel Equivalents" have been modified to read: "R-19 + R-6 in 2 x 6, or R-19 + R-12 in 2 x 8 or 2 x 10."
      TABLE N1102.2.6
      STEEL-FRAME CEILING, WALL AND FLOOR INSULATION (R-VALUE)
 
Wood Frame
R-Value Requirement
Cold-Formed Steel
Equivalent R-Value a
Steel Truss Ceilingsb
R-30
R-38 or R-30 + 3 or R-26 +5
R-38
R-49 or R-38 +3
R-49
R-38 +5
Steel Joist Ceilingsb
R-30
R-38 in 2 x 4 or 2 x 6 or 2 x 8; R-49 in any framing
R-38
R-49 in 2 x 4 or 2 x 6 or 2 x 8 or 2 x 10
Steel Frame Wall
R-13
R-13 + 5 or R-15 + 4 or R-21 +3 or R-0 +10
R-19
R-13 + 9 or R-19 + 8 or R-25 + 7
R-21
R-13 + 10 or R-19 + 9 or R-25 + 8
Steel Joist Floor
R-13
R-19 in 2 x 6, R-19 +R-6 in 2 x 8 or 2 x 10
R-19
R-19 + R-6 in 2 x 6 or R-19 + R-12 in 2 x 8 or 2 x 10
 
         a.      Cavity insulation R-value is listed first, followed by continuous insulation R-value.
         b.      Insulation exceeding the height of framing shall cover the framing.
N1102.2.10 (R402.2.10) Slab-On-Grade Floors - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section of the 2009 IRC by striking a portion of the section heading (R402.2.19). This section has been modified to read:
"N1102.2.10 Slab-On-Grade Floors. Slab-on-grade floors with a floor surface less than 12 inches (305 mm) below grade shall be insulated in accordance with table N1102.1.2. The insulation shall extend downward from the top of the slab on the outside or inside of the foundation wall. Insulation located below grade shall be extended the distance provided in table N1102.1.2 by any combination of vertical insulation, insulation extending under the slab or insulation extending out from the building. Insulation extending away from the building shall be protected by pavement or by not less than 10 inches (254 mm) of soil. The top edge of the insulation installed between the exterior wall and the edge of the interior slab shall be permitted to be cut at a 45 degree (0.79 rad) angle away from the exterior wall. Slab-edge insulation is not required in jurisdictions designated by the building official as having a very heavy termite infestation."
N1102.2.11 (R402.2.11) Crawl Space Walls - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section title (R402.2.11). This section has been modified to read:
"N1102.2.11 Crawl Space Walls. As an alternative to insulating floors over crawl spaces, crawl space walls shall be permitted to be insulated when the crawl space is not vented to the outside. Crawl space wall insulation shall be permanently fastened to the wall and extend downward from the floor to the finished grade level and then vertically and/or horizontally for at least an additional 24 inches (610 mm). Exposed earth in unvented crawl space foundations shall be covered with a continuous class I vapor retarder in accordance with this code. All joints of the vapor retarder shall overlap by 6 inches (153 mm) and be sealed or taped. The edges of the vapor retarder shall extend not less than 6 inches (153 mm) up the stem wall and shall be attached to the stem wall."
N1102.2.12 (R402.2.12) Masonry Veneer - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section title (R402.2.12). This section has been modified to read:
"N1102.2.12 Masonry Veneer. Insulation shall not be required on the horizontal portion of the foundation that supports a masonry veneer."
N1102.2.13 (R402.2.13) Sunroom Insulation - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking and renaming portions of the section title and by striking portions of the section and the exception to the section and bringing the two requirements from the exception into the body of the section requirements. This section has been modified to read:
"N1102.2.13 Thermally Isolated Sunroom Insulation. The minimum ceiling insulation R-values shall be R-19 in zones 1 through 4 and R-24 in zones 5 through 8. The minimum wall R-value shall be R-13 in all zones. New walls separating the sunroom from the conditioned space shall meet the building thermal envelope requirements."
N1102.3 (R402.3) Fenestration (Prescriptive) - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking portions of the section heading (R402.3) and (Prescriptive), and the language requiring compliance with section N1102 and N1102.3.1 through N1102.4.5. This section has been modified to read:
"N1102.3 Fenestration."
N1102.3.1 (R402.3.1) U-Factor - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section heading (R402.3.1). This section has been modified to read:
"N1102.3.1 U-Factor. An area-weighted average of fenestration products shall be permitted to satisfy the U-factor requirements."
N1102.3.2 Glazed Fenestration SHGC - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section heading (R402.3.2), and by deleting language that allows dynamic glazing to satisfy the SHGC requirements when it meets specific criteria and by striking the exception to the section. This section has been modified to read:
"N1102.3.2 Glazed Fenestration SHGC. An area-weighted average of fenestration products more than 50-percent glazed shall be permitted to satisfy the solar heat gain coefficient (SHGC) requirements."
N1102.3.3 (R402.3.3) Glazed Fenestration Exemption - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section of the 2009 IRC by striking a portion of the section heading (R402.3.3). This section has been modified to read:
"N1102.3.3 Glazed Fenestration Exemption. Up to 15 square feet (1.4 square meters) of glazed fenestration per dwelling unit shall be permitted to be exempt from U-factor and SHGC requirements in section N1102.1.2. This exemption shall not apply to the U-factor alternative approach in N1102.1.4 and the total UA alternative approach in N1102.1.5."
N1102.3.4 (R402.3.4) Opaque Door Exemption - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section of the 2009 IRC by striking a portion of the section heading (R402.3.4). This section has been modified to read:
"N1102.3.4 Opaque Door Exemption. One side-hinged opaque door assembly up to 24 square feet (2.22 square meters) in area is exempted from the U-factor requirement in section N1102.1.2. This exemption shall not apply to the U-factor alternative approach in section N1102.1.4 and the total UA alternative in section N1102.1.5."
N1102.3.5 (R402.3.5) Sunroom Fenestration - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section of the 2009 IRC by striking and renaming the section heading, and striking the requirement for the sunroom enclosing conditioned space to meet the fenestration requirements of the code, and striking a portion of the exception and moving the remainder of the exception into the code language for the section. This section has been modified to read:
"N1102.3.5 Thermally Isolated Sunroom U-Factor. For zones 4 through 8, the maximum fenestration U-factor shall be 0.50 and the maximum skylight U-factor shall be 0.75. New windows and doors separating the sunroom from conditioned space shall meet the building thermal envelope requirements."
N1102.3.6 Replacement Fenestration - OUBCC Added. This section has been added to the code to add a requirement for replacement fenestration to meet the U-factor and SHGC requirements in table N1102.2.6. This section has been added to read:
"N1102.3.6 Replacement Fenestration. Where some or all of an existing fenestration unit is replaced with a new fenestration product, including sash and glazing, the replacement fenestration unit shall meet the applicable requirements for U-factor and solar heat gain coefficient (SHGC) in table N1102.1.2."
N1102.4 (R402.4) Air Leakage (Mandatory) - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section of the 2009 IRC by striking portions of the section heading (R402.4) and (Mandatory), and by deleting the requirement for the building thermal envelope to be constructed to limit air leakage in accordance with the requirements of sections R1102.4.1 through R1102.4.4. This section has been modified to read:
"N1102.4 Air Leakage."
N1102.4.1 (R402.4.1) Building Thermal Envelope - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section of the 2009 IRC by striking a portion of the section heading (R402.4.1), and by striking the requirement for the building thermal envelope to comply with sections N1102.4.1.1 and N1102.4.1.2 and adding requirements for the building thermal envelope to be durably sealed to limit infiltration and requiring several areas to be caulked, gasketed, weather-stripped or otherwise sealed with an air barrier. This section has been modified to read:
"N1102.4.1 Building Thermal Envelope. The building thermal envelope shall be durably sealed to limit infiltration. The sealing methods between dissimilar materials shall allow for differential expansion and contraction. The following shall be caulked, gasketed, weather-stripped or otherwise sealed with an air barrier material, suitable film or solid material.
      1.   All joints seams and penetrations.
      2.   Site-built windows, doors and skylights.
      3.   Openings between window and door assemblies and their respective jambs and framing.
      4.   Utility penetrations.
      5.   Dropped ceilings or chases adjacent to the thermal envelope.
      6.   Knee walls.
      7.   Walls and ceilings separating the garage from conditioned spaces.
      8.   Behind tubs and showers on exterior walls.
      9.   Common walls between dwelling units.
      10.   Attic access openings.
      11.   Rim joists junction.
      12.   Other sources of infiltration.
N1102.4.1.1 (R402.4.1.1) Installation - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking and renaming portions of the section heading and striking a requirement for the components of the building thermal envelope as listed in table N1102.4.1.1 to be installed in accordance with the manufacturer's instructions and the criteria listed in table N1102.4.1.1 and by adding a requirement for the building envelope air tightness and insulation installation be demonstrated to comply with one of the options given by sections N1102.4.2.1 or N1102.4.2.2. This section has been modified to read:
"N1102.4.1.1 Air Sealing And Insulation. Building envelope air tightness and insulation installation shall be demonstrated to comply with one of the following options given by sections N1102.4.1.2 or N1102.4.1.3."
N1102.4.1.2 (R402.4.1.2) Testing - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section heading, (R402.4.1.2); adding the word "option" to the section heading; deleting requirements for the building or dwelling unit testing and verification to have an air leakage rate meeting certain criteria; and adding other testing requirements. This section has been modified to read:
"N1102.4.1.2 Testing Option. Tested air leakage rate is less than 7 ACH when tested with a blower door at a pressure of 50 pascals (0.007 psi). Testing shall occur after rough in and after installation of penetrations of the building envelope including penetrations for utilities, plumbing, electrical, ventilation and combustion appliances. During testing:
      1.   Exterior windows and doors, fireplace and stove doors shall be closed, but not sealed;
      2.   Dampers shall be closed, but not sealed; including exhaust, intake, makeup air, back draft and flu dampers;
      3.   Interior doors shall be open;
      4.   Exterior openings for continuous ventilation systems and heat recovery ventilators shall be closed and sealed;
      5.   Heating and cooling system(s) shall be turned off;
      6.   HVAC ducts shall not be sealed; and
      7.   Supply and return registers, shall not be sealed."
N1102.4.1.3 Visual Inspection - OUBCC Added. This section has been added to read:
"N1102.4.1.3 Visual Inspection. The items listed in table N1102.4.1.1 applicable to the method of construction, are field verified. Where required by the code official, an approved party independent from the installer of the insulation or contractor, shall inspect the air barrier and insulation. Where no approved party inspects these items the air barrier components shall be viewed as a part of the frame inspection or insulation inspection by the authority having jurisdiction."
N1102.4.2. (R402.4.2) Fireplaces - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section of the 2009 IRC by striking a portion of the heading (R402.4.2) and requiring new wood-burning fireplaces have outdoor combustion air. This section has been modified to read:
"N1102.4.2 Fireplaces. New wood-burning fireplaces shall have outdoor combustion air."
N1102.4.3 (R402.4.3) Fenestration Air Leakage - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section of the 2009 IRC by deleting a portion of the section heading, (R402.4.3). This section has been modified to read:
"N1102.4.3 Fenestration Air Leakage. Windows, skylights and sliding glass doors shall have an air infiltration rate of no more than 0.3 cfm per square foot (1.5 l divided by s divided by square meters), and swinging doors no more than 0.5 cfm per square foot (2.5 l divided by s divided by square meters), when tested according to NFRC 400 or AAMA/WDMA/CSA 101/I.S.2/A440 by an accredited, independent laboratory and listed and labeled by the manufacturer.
Exception: Site-built windows, skylights, and doors."
N1102.4.4 (R402.4.4) Rooms Containing Fuel Burning Appliances - OUBCC Deleted. This section has been stricken from the code.
Table N1102.4.1.1 (R402.1.1) Air Barrier And Insulation Installation - OUBCC Amendatory. This table has been modified to bring it into alignment with the corresponding table in the 2009 IRC. The table contains three columns and eighteen rows as published in the 2015 IRC. The first row contains the column headings: "Component", "Air Barrier Criteria" and "Insulation Installation Criteria." The table description with modifications, is listed below:
      1.   In row 1, the second column, entitled "Air Barrier Criteria" has been modified to strike the words "Air Barrier" and is now entitled "Criteria."
      2.   In row 1, the third column, entitled "Insulation Installation Criteria" has been stricken from the table. All corresponding content in all remaining sixteen rows has been stricken.
      3.   The following modifications have been made to row 2:
3.1 In the first column, entitled "Component" the wording "General requirements" has been stricken and replaced with:
Air barrier and thermal barrier.
3.2 In the second column, entitled "Criteria" the wording "A continuous air barrier shall be installed in the building envelope. The exterior thermal envelope contains a continuous air barrier. Breaks or joints in the air barrier shall be sealed" has been stricken and replaced with the following:
"Exterior thermal envelope insulation for framed walls is installed in substantial contact and continuous alignment with the building envelope air barrier. Breaks or joints in the air barrier are filled or repaired. Air-permeable insulation is not used as a sealing material. Air-permeable insulation is inside of an air barrier."
      4.   The following modifications have been made to row 3:
4.1 In the second column entitled, "Criteria," in the first sentence the words "The air", "shall be" and "in the air barrier" have been stricken and the sentence has been modified to read:
Air barrier in any dropped ceiling/soffit substantially aligned with insulation and any gaps are sealed.
4.2 The second sentence "Access openings, drop down stairs or knee wall doors to unconditioned attic spaces shall be sealed" has been stricken and replaced with the following:
"Attic access (except unvented attic), knee wall door, or drop down door stair is sealed."
      5.   The following modification has been made to row 4: In the second column, entitled "Criteria," the wording "The junction of the foundation sill plate shall be sealed. The junction of the top plate and the top of the exterior walls shall be sealed. Knee walls shall be sealed," has been stricken and replaced with the following:
"Corners and headers are insulated. Junction of foundation and sill plate is sealed."
      6.   The following modifications have been made to row 5:
6.1 In the first column, entitled "Component" the word "skylights" has been stricken. The wording now reads:
"Windows and doors."
6.2 In the second column, entitled "Criteria," the words "and skylights and framing shall be" have been stricken. The word "are" has been added to the wording. The section has been modified to read:
"The spaces between window/door jambs and framing are sealed."
      7.   The following modification has been made to row 6: In the second column entitled, "Criteria" the words "shall" and "the" have been stricken and the wording "are insulated and" has been added. The section has been modified to read:
"Rim joists are insulated and include an air barrier."
      8.   The following modification has been made to row 7: In the second column entitled, "Criteria" the words "The," "shall be" and "insulation" have been stricken and the words "Insulation is installed to maintain permanent contact with the underside of subfloor decking," "is" and "floor" have been added. The section has been modified to read:
"Insulation is installed to maintain permanent contact with the underside of subfloor decking. Air barrier is installed at any exposed edge of floor."
      9.   The following modification has been made to row 8: In the second column entitled, "Criteria" the wording "shall be" has been stricken and the words "Insulation is permanently attached to walls" and "is" have been added. The section has been modified to read:
"Insulation is permanently attached to walls. Exposed earth in unvented crawl spaces is covered with a class I vapor retarder with overlapping joints taped."
      10.   The following modification has been made to row 9: In the second column entitled, "Criteria" the wording "shall be has been stricken. The wording "knee walls" and "are" have been added. The section has been modified to read:
"Duct shafts, utility penetrations, knee walls and flue shafts opening to exterior or unconditioned space are sealed."
      11.   The following modification has been made to row 10: In the second column entitled "Criteria" the wording "Batts in narrow cavities are cut to fit, or narrow cavities are filled by sprayed/blown insulation," has been added. Previously the section was blank. This section has been modified to read:
"Batts in narrow cavities are cut to fit, or narrow cavities are filled by sprayed/blown insulation."
      12.   The following modification has been made to row 11: In the second column entitled, "Criteria" the wording "shall be" has been stricken and replaced with the wording "is." The section has been modified to read:
"Air sealing is provided between the garage and conditioned space."
      13.   The following modifications have been made to row 12:
13.1 In the second column entitled, "Criteria" the wording "installed in the building thermal envelope shall be" has been stricken and replaced with "are air tight, IC rated and." The first sentence has been modified to read:
"Recessed light fixtures are airtight, IC rated and sealed to the drywall."
13.2 In the second column entitled, "Criteria" an exception has been added to read:
"Exception: Fixtures in conditioned space."
      14.   The following modification has been made to row 13: In the second column entitled, "Criteria" the wording "Insulation is placed between outside and pipes. Batt insulation is cut to fit around wiring and plumbing or sprayed/blown insulation extends behind piping and wiring" has been added to the previously blank section. The section has been modified to read:
"Insulation is placed between outside and pipes. Batt insulation is cut to fit around wiring and plumbing or sprayed/blown insulation extends behind piping and wiring."
      15.   The following modification has been made to row 14: In the second column entitled, "Criteria" the wording "The air barrier installed at exterior walls adjacent to" and "shall separate them from the showers and tubs" has been stricken. The wording "on exterior walls have insulation and an air barrier separating them from the exterior wall" have been added. The section has been modified to read:
"Showers and tubs on exterior walls have insulation and an air barrier separating them from the exterior wall."
      16.   The following modification has been made to row 15: In the second column entitled, "Criteria" the wording "The," "shall be installed" and "electrical or communication" has been stricken. The wording "extends," "type" and "are" have been added. The section has been revised to read:
"Air barrier extends behind boxes or air-sealed boxes are installed."
      17.   The following modifications have been made to row 16: A new row has been added to the table. The added information is listed below:
17.1 In the first row entitled, "Component" the wording "Common wall" has been added. The section has been added to read:
"Common wall."
17.2 In the second row entitled, "Component" the wording "Air barrier is installed in common wall between dwelling units" has been added. The section has been added to read:
"Air barrier is installed in common wall between dwelling units."
      18.   The following modification has been made to row 17: In the second column entitled, "Criteria" the wording "thermal," "shall be" and "the" has been stricken and the word "are" has been added. The section has been modified to read:
"HVAC register boots that penetrate building envelope are sealed to subfloor and drywall."
      19.   The following modifications have been made to row 18:
19.1 In the first column entitled, "Component" the wording "Concealed sprinklers" has been stricken and replace with "Fireplaces". The section has been modified to read:
"Fireplaces."
19.2 In the second column entitled, "Criteria" the wording "when required to be sealed, concealed fire sprinklers shall only be sealed in a manner that is recommended by the manufacturer. Caulking or other adhesive sealants shall not be used to fill void between fire sprinkler cover plates and walls or ceilings" has been stricken. The wording "Fireplace walls include an air barrier" has been added. The section has been modified to read:
"Fireplace walls include an air barrier."
      TABLE N1102.4.1.1
      AIR BARRIER AND INSULATION INSTALLATION
 
Component
Criteria
Air barrier and thermal barrier
Exterior thermal envelope insulation for framed walls is installed in substantial contact and continuous alignment with the building envelope air barrier. Breaks or joints in the air barrier are filled or repaired. Air-permeable insulation is not used as a sealing material. Air- permeable insulation is inside of an air barrier.
Air barrier in any dropped ceiling/soffit substantially aligned with insulation and any gaps are sealed
Attic access (except unvented attic), knee wall door, or drop down door stair is sealed.
Walls
Corners and headers are insulated. Junction of foundation and sill plate is sealed.
Windows and doors
The spaces between window/door jambs and framing are sealed.
Rim joists
Rim joists are insulated and include an air barrier.
Floors (including above garage and cantilevered floors)
Insulation installed to maintain permanent contact with the underside of subfloor decking. Air barrier is installed at any exposed edge of floor.
Crawl space walls
Insulation is permanently attached to walls. Exposed earth in unvented crawl spaces is covered with a class I vapor retarder with overlapping joints taped.
Shafts, penetrations
Duct shafts, utility penetrations, knee walls and flue shafts opening to exterior or unconditioned space are sealed.
Narrow cavities
Batts in narrow cavities are cut to fit, or narrow cavities are filled by sprayed/blown insulation.
Garage separation
Air sealing is provided between the garage and conditioned space.
Recessed lighting
Recessed light fixtures are airtight, IC rated and sealed to the drywall. Exception: Fixtures in conditioned space.
Plumbing and wiring
Insulation is placed between outside and pipes. Batt insulation is cut to fit around wiring and plumbing or sprayed/blown insulation extends behind piping and wiring.
Shower/tub on exterior wall
Showers and tubs on exterior walls have insulation and an air barrier separating them from the exterior wall.
Electrical/phone box on exterior walls
Air barrier extends behind boxes or air- sealed boxes are installed.
Common wall
Air barrier is installed in common wall between dwelling units.
HVAC register boots
HVAC register boots that penetrate building envelope are sealed to subfloor and drywall.
Fireplaces
Fireplace walls include an air barrier.
 
N1102.4.5 (R402.4.5) Recessed Lighting - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section heading (R402.4.5), and by changing the air leakage rate requirements for recessed luminaries. This section has been modified to read:
"N1102.4.5 Recessed Lighting. Recessed luminaries installed in the building thermal envelope shall be sealed to limit air leakage between conditioned and unconditioned space. All recessed luminaries shall be IC-rated and labeled as meeting ASTM E 283 when tested at 1.57 psi (75 Pa) pressure differential with no more than 2.0 cfm (0.944 l/s) of air movement from the conditioned space to the ceiling cavity. All recessed luminaries shall be sealed with a gasket or caulk between the housing and the interior wall or ceiling cover."
N1102.5 (R402.5) Maximum Fenestration U-Factor And SHGC (Mandatory) - OUBCC Deleted. This section has been stricken from the code.
N1103.1 (R403.1) Controls (Mandatory) - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking portions of the section heading (R403.1) and (Mandatory), and striking the word "provided" and adding the word "installed." This section has been modified to read:
"N1103.1 Controls. At least one thermostat shall be installed for each separate heating and cooling system."
N1103.1.1 (R403.1.1) Programmable Thermostat - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section of the 2009 IRC by striking a portion of the heading (R403.1.1), and making it a requirement for at least one thermostat to be programmable where the primary heating system is a forced air furnace. This section has been modified to read:
"N1103.1.1 Programmable Thermostat. Where the primary heating system is a forced air furnace, at least one thermostat per dwelling unit shall be capable of controlling the heating and cooling system on a daily schedule to maintain different temperature set points at different times of the day. This thermostat shall include the capability to set back or temporarily operate the system to maintain zone temperature down to 55 degrees Fahrenheit (13 degrees Celsius) or up to 85 degrees Fahrenheit (29 degrees Celsius). The thermostat shall initially be programmed with a heating temperature set point no higher than 70 degrees Fahrenheit (21 degrees Celsius) and a cooling temperature set point no lower than 78 degrees Fahrenheit (26 degrees Celsius)."
N1103.1.2 (R403.1.2) Heat Pump Supplementary Heat (Mandatory) - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking portions of the section heading (R403.1.2) and (Mandatory). This section has been modified to read:
"N1103.1.2 Heat Pump Supplementary Heat. Heat pumps having supplementary electric-resistance heat shall have controls that, except during defrost, prevent supplemental heat operation when the heat pump compressor can meet the heating load."
N1103.2 (R403.2) Hot Water Boiler Outdoor Temperature Setback - OUBCC Deleted. This section has been stricken from the code.
N1103.3 (R403.3) Ducts - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section of the 2009 IRC by striking a portion of the section heading (R403.3) and by striking the requirement for ducts and air handlers to be in accordance with sections N1103.3.1 through N1103.3.5. This section has been modified to read:
"N1103.3 Ducts."
N1103.3.1 (R403.3.1) Insulation (Prescriptive) - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section of the 2009 IRC by striking portions of the section heading (R403.3.1) and (Prescriptive), and by requiring supply ducts in attics to be insulated to a minimum of R-8 and all other ducts to be insulated to a minimum of R-6. This section has been modified to read:
"N1103.3.1 Insulation. Supply ducts in attics shall be insulated to a minimum of R-8. All other ducts shall be insulated to a minimum of R-6. Exception: Ducts or portions thereof located completely inside the building thermal envelope."
N1103.3.2 (R403.3.2) Sealing (Mandatory) - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section of the 2009 IRC by striking portions of the section heading (R403.3.2) and (Mandatory), and by requiring building cavities used as ducts to be sealed, striking a requirement for joints and seams to comply with the international mechanical code, requiring duct tightness to be verified by one of two tests: rough-in or post construction, by deleting two exceptions to the section and to include the following exception: Visual inspection may be used instead of the rough-in test and post construction test. This section has been modified to read:
"N1103.2.2 Sealing. Ducts, air handlers, filter boxes and building cavities used as ducts shall be sealed. Joints and seams shall comply with section M1601.4. For duct systems with sheet metal plenums, Y's and supply boots, only liquid applied sealants complying with UL 181 BM (mastic or similar) or equivalent method, shall be used to seal inner liners and start collars to plenum and any other seams in the system. Duct tightness shall be verified by one of the following:
      1.   Post-construction test: Leakage to outdoors shall be less than or equal to 8 cfm (3.78l/s) per 100 square feet (9.29 square meters) of conditioned floor area or a total leakage less than or equal to 12 cfm (5.66 l/s) per 100 square feet (9.29 square meters) of conditioned floor area when tested at a pressure differential of 0.1 inch w.g. (25 Pa) across the entire system, including the manufacturer's air handler end closure. All register boots shall be taped or otherwise sealed during the test.
      2.   Rough-in test: total leakage shall be less than or equal to 6 cfm (2.83 l/s) per 100 square feet (9.29 square meters) of conditioned floor area when tested at a pressure differential of 0.1 inch w.g. (25 Pa) across the roughed in system, including the manufacturer's air handler enclosure. All registered boots shall be taped or otherwise sealed during the test. If the air handler is not installed at the time of the test, total leakage shall be less than or equal to 4 cfm (1.89 l/s) per 100 square feet (9.29 square meters) of conditioned floor space.
      3.   Visual verification by the authority having jurisdiction or an approved agency.
Exception: Duct tightness test is not required if the air handler and all ducts are located within conditioned space.
N1103.3.2.1 (R403.2.1) Sealed Air Handler - OUBCC Deleted. This section has been stricken from the code.
N1103.3.3 (R403.3.3) Duct Testing (Mandatory) - OUBCC Deleted. This section has been stricken from the code.
N1103.3.4 (R403.3.4) Duct Leakage (Mandatory) - OUBCC Deleted. This section has been stricken from the code.
N1103.3.5 (R403.3.5) Building Cavities (Mandatory) - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking portions of the section heading (R403.3.5) and (Mandatory), and by prohibiting building cavities from being used as supply ducts. This section has been modified to read:
"N1103.3.5 Building Cavities. Building framing cavities shall not be used as supply ducts."
N1103.4 (R403.4) Mechanical System Piping Insulation (Mandatory) - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking portions of the section heading (R403.4) and (Mandatory), and by changing the R-value. This section has been modified to read:
"N1103.4 Mechanical System Piping Insulation. Mechanical system piping capable of carrying fluids above 105 degrees Fahrenheit (41 degrees Celsius) or below 55 degrees Fahrenheit (13 degrees Celsius) shall be insulated to a minimum of R-2."
N1103.4.1 (R403.4.1) Protection Of Piping Insulation - OUBCC Deleted. This section has been stricken from the code.
N1103.5 (R403.5) Service Hot Water Systems - OUBCC Amendatory. This section has been modified by striking a portion of the section heading (R403.5), amending the section heading to include the word "Circulation," and adding the wording "potable" to the text of the section to further define the system type. This section has been modified to read:
"N1103.5 Circulation Service Hot Water Systems From N1103.5.1 And N1103.5.2. Energy conservation measures for circulation service potable hot water systems shall be in accordance with sections N1103.5.1 and N1103.5.2."
N1103.5.1 (R403.5.1) Heated Water Circulation And Temperature Maintenance Systems (Mandatory) - OUBCC Amendatory. This section has been modified to remove a portion of the section heading (R403.5.1). This section has been modified to read:
"N1103.5.1 Heated Water Circulation And Temperature Systems (Mandatory). Heated water circulation systems shall be in accordance with section R1103.5.1.1. Heat trace temperature maintenance systems shall be in accordance with section R1103.5.1.2. Automatic controls, temperature sensors and pumps shall be accessible. Manual controls shall be readily accessible."
N1103.5.1.1 (R403.5.1.1) Circulation Systems - OUBCC Amendatory. This section has been modified to remove a portion of the section heading (R403.5.1.1). This section has been modified to read:
"N1103.5.1.1 Circulation Systems. Heated water circulation systems shall be provided with a circulation pump. The system return pipe shall be a dedicated return pipe or a cold water supply pipe. Gravity and thermo- syphon circulation systems shall be prohibited. Controls for circulating hot water system pumps shall start the pump based on the identification of a demand for hot water within the occupancy. The controls shall automatically turn off the pump when the water in the circulation loop is at the desired temperature and when there is no demand for hot water."
N1103.5.1.2 (R403.5.1.2) Heat Trace Systems - OUBCC Amendatory. This section has been modified to remove a portion of the section heading (R403.5.1.2). This section has been modified to read:
"N1103.5.1.2 Heat Trace Systems. Electric heat trace systems shall comply with IEEE 515.1 or UL 515. Controls for such systems shall automatically adjust the energy input to the heat tracing to maintain the desired water temperature in the piping in accordance with the times when heated water is used in the occupancy."
N1103.5.2 (R403.5.2) Demand Recirculation Systems - OUBCC Amendatory. This section has been modified to strike a portion of the section heading (R403.5.2). This section has been modified to read:
"N1103.5.2 Demand Recirculation Systems. A water distribution system having one or more recirculation pumps that pump water from a heated water supply pipe back to the heated water source through a cold water supply pipe shall be a demand recirculation water system. Pumps shall have controls that comply with both of the following:
      1.   The control shall start the pump upon receiving a signal from the action of a user of a fixture or appliance, sensing the presence of a user of a fixture or sensing the flow of hot or tempered water to a fixture fitting or appliance.
      2.   The control shall limit the temperature of the water entering the cold water piping to 104 degrees Fahrenheit (40 degrees Celsius)."
N1103.5.3 (R403.5.3) Hot Water Pipe Insulation (Prescriptive) - OUBCC Amendatory. This section has been modified to strike a portion of the header (R403.5.3), and by changing the size of piping required to have insulation from 3/4 inch to 1 inch. This section has been modified to read:
"N1103.5.3 Hot Water Pipe Insulation (Prescriptive). Insulation for hot water pipe with a minimum thermal resistance (R-value) of R-3 shall be applied to the following:
      1.   Piping 1 inch (25 mm) and larger in nominal diameter.
      2.   Piping serving more than one dwelling unit.
      3.   Piping located outside the conditioned space.
      4.   Piping from the water heater to the distribution manifold.
      5.   Piping located under a floor slab.
      6.   Buried in piping.
      7.   Supply and return piping in recirculation systems other than demand recirculation systems."
N1103.5.4 (R403.5.4) Drain Water Heat Recovery Units - OUBCC Deleted. This section has been stricken from the code.
N1103.6 (R403.6) Mechanical Ventilation (Mandatory) - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking portions of the section heading (R403.6) and (Mandatory), and by requiring outdoor air intakes and exhausts to have automatic or gravity dampers that close when the ventilation system is not operating. This section has been modified to read:
"N1103.6 Mechanical Ventilation. Outdoor air intakes shall have automatic or gravity dampers that close when the ventilation system is not operating."
N1103.6.1 (R403.6.1) Whole-House Mechanical Ventilation System Fan Efficacy - OUBCC Deleted. This section has been stricken from the code.
N1103.7 (R403.7) Equipment Sizing And Efficiency Rating (Mandatory) - OUBCC Amendatory. This section has been modified by bring it into alignment with the corresponding section in the 2009 IRC by striking portions of the section heading (R403.7) and (Mandatory), and by requiring the heating and cooling equipment to be sized according to section M1401.3. This section has been modified to read:
"N1103.7 Equipment Sizing And Efficiency Rating. Heating and cooling equipment shall be sized as specified in M1401.3."
Table N1103.6.1 (R403.6.1) Mechanical Ventilation System Fan Efficacy - OUBCC Deleted. This table has been stricken from the code.
N1103.8 (R403.8) Systems Serving Multiple Dwelling Units (Mandatory) - OUBCC Deleted. This section has been stricken from the code.
N1103.9 (R403.9) Snow Melt System Controls (Mandatory) - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking portions of the section heading (R403.9) and (Mandatory). This section has been modified to read:
"N1103.9 Snow Melt System Controls. Snow- and ice-melting systems, supplied through energy service to the building shall include automatic controls capable of shutting off the system when the pavement temperature is above 50 degrees Fahrenheit (10 degrees Celsius), and no precipitation is falling and an automatic or manual control that will allow the shutoff when the outdoor temperature is above 40 degrees Fahrenheit (5 degrees Celsius)."
N1103.10 (R403.10) Pools And Permanent Spa Energy Consumption (Mandatory) - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section of the 2009 IRC by striking portions of the section heading (R403.10) and (Mandatory), and by modifying the heading and the requirements in the section so the section is applicable only for pools. This section has been modified to read:
"N1103.10 Pools. Pools shall be provided with energy conservation measures in accordance with sections N1103.10.2 through N1103.10.4."
N1103.10.1 (R403.10.1) Residential Pools And Permanent Residential Spas - OUBCC Deleted. This section has been stricken from the code.
N1103.10.2 (R403.10.2) Heaters - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section heading (R403.10.2), modifying the section heading to include the word "Pool" and modifying the section to require all pool heaters to be equipped with a readily accessible on-off switch without adjusting the thermostat settings and prohibiting all pool heaters fired by natural gas or LPG to have continuously burning pilot lights. This section has been modified to read:
"N1103.10.2 Pool Heaters. All pool heaters shall be equipped with a readily accessible on-off switch to allow shutting off the heater without adjusting the thermostat setting. Pool heaters fired by natural gas or LPG shall not have continuously burning pilot lights."
N1103.10.3 (R403.10.3) Time Switches - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section heading (R403.10.3), and requiring time switches on all pool heaters and pumps that can automatically turn off the heater or pump. This section has been modified to read:
"N1103.10.3 Time Switches. Time switches that can automatically turn off and on heaters and pumps according to a preset schedule shall be installed on swimming pool heaters and pumps.
Exceptions:
      1.   Where public health standards require 24-hour pump operation.
      2.   Where pumps are required to operate solar- and waste- heat-recovery pool heating systems."
N1103.10.4 (R403.10.4) Pool Covers - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section heading (R403.10.4), striking the exception to the section, and removing the requirement for heated pools to have a vapor retardant pool cover on or at the water surface. This section has been modified to read:
"N1103.10.4 Pool Covers. Pools heated to more than 90 degrees Fahrenheit (32 degrees Celsius) shall have a pool cover with a minimum insulation value of R-12."
N1103.11 (R403.11) Portable Spas (Mandatory) - OUBCC Deleted. This section has been stricken from the code.
N1103.12 (R403.12) Residential Pools And Permanent Residential Spas - OUBCC Deleted. This section has been stricken from the code.
N1104 (R404) Electrical Power And Lighting Systems (Mandatory) - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking portions of the section heading. This section has been revised to read:
"N1104 Lighting Systems."
N1104.1 (R404.1) Lighting Equipment (Mandatory) - OUBCC Amendatory. This section has been modified to bring it into alignment with the corresponding section in the 2009 IRC by striking a portion of the section heading (R404.1) and to include the wording "luminaries" in place of "lighting fixtures" in the code language. This section has been modified to read:
"N1104.1 Lighting Equipment. Not less than 75 percent of the lamps in permanently installed luminaries shall be high-efficacy lamps or not less than 75 percent of the permanently installed luminaries shall contain only high- efficacy lamps.
Exception: Low-voltage lighting."
N1104.1.1 (R401.1) Lighting Equipment (Mandatory) - OUBCC Deleted. This section has been stricken from the code.
N1105 (R405) Simulated Performance Alternative (Performance) - OUBCC Deleted. This section, including all subsections and tables, has been stricken from the code.
N1106 (R406) Energy Rating Index Compliance Alternative - OUBCC Deleted. This section, including all subsections and tables, has been stricken from the code.
N1107 (R501) Existing Buildings - General - OUBCC Deleted. This section, including all subsections, has been stricken from the code.
N1108 (R502) Additions - OUBCC Deleted. This section, including all subsections, has been stricken from the code.
N1109 (R503) Alterations - OUBCC Deleted. This section, including all subsections, has been stricken from the code.
N1110 (R504) Repairs - OUBCC Deleted. This section, including all subsections, has been stricken from the code.
N1111 (R505) Change Of Occupancy Or Use - OUBCC Deleted. This section, including all subsections, has been stricken from the code.
IRC 2015 Chapter 15 Exhaust Systems
M1502.3 Duct Termination - OUBCC Amendatory. This section has been modified to add a requirement that exhaust ducts terminate a minimum of 12 inches (305 mm) above the ground or any obstruction. This section has been modified to read:
"M1502.3 Duct Termination. Exhaust ducts shall terminate on the outside of the building. Exhaust duct terminations shall be in accordance with the dryer manufacturer's installation instructions. If the manufacturer's instructions do not specify a termination location, the exhaust duct shall terminate not less than 3 feet (914 mm) in any direction from the openings into buildings nor less than 12 inches from finished ground level or other obstruction. Exhaust duct terminations shall be equipped with a backdraft damper. Additionally, exhaust shall not terminate within 3 feet (914 mm) of condensing units and a minimum 12 inches (305 mm) from the ground or any obstruction. Screens shall not be installed at the duct termination."
M1502.4.2 Duct Installation - OUBCC Amendatory. This section has been modified to prohibit ducts from being joined with any screws or similar fasteners that protrude into the inside of the duct and to change the length of support intervals from 12 feet to 4 feet. This section has been modified to read:
"M1502.4.2 Duct Installation. Exhaust ducts shall be supported at 4 feet (1219 mm) intervals and secured in place. The insert end of the duct shall extend into the adjoining duct or fitting in the direction of airflow. Ducts shall not be joined with screws or similar fasteners that protrude into the inside of the duct."
IRC 2015 Chapter 16 Duct Systems
Table M1601.1.1 Duct Construction Minimum Sheet Metal Thickness For Single Dwelling Units - OUBCC Amendatory. Table M1601.1.1 has been stricken from the code and replaced with a newly created table with the same table heading. The newly created table contains three columns and three rows and a footnote. The description of the newly created table is listed below:
      1.   Row 1: Contains the three column headings as follows:
1.1 Column 1 heading is entitled "Duct Size".
1.2 Column 2 heading is entitled "Galvanized" with two sub-columns; the first sub-column is entitled "Minimum Thickness (Inches)" and the second sub-column is entitled Equivalent Galvanized Gage No."
1.3 Column 3 heading is "Approximate Aluminum B And S Gage."
      2.   Row 2: Under the first column entitled "Duct Size" are four sub-rows with corresponding dashes or figures that match to each sub-row in the second (including sub- columns) and third columns. Those sub-rows and figures are as follows:
2.1 Sub-row 1 in column 1 lists "Round ducts and enclosed" and in column 2 entitled, "Galvanized," (sub- column "Minimum Thickness (Inches) and sub-column "Equivalent Galvanized Gage No." and in column 3 entitled "Approximate Aluminum B And S Gage" a "dash" is listed instead of a figure.
2.2 Sub-row 2 in column 1 lists "Rectangular ducts" and in column 2, entitled "Galvanized" (sub-column "Minimum Thickness (Inches)" and sub-column "Equivalent Galvanized Gage No." and in column 3, entitled "Approximate Aluminum B And S Gage" a "dash" is listed instead of a figure.
2.3 Sub-row 3 in column 1 lists "14 inches or less" and in column 2, entitled "Galvanized," sub-column "Minimum Thickness (Inches)" lists the figure "0.013", sub-column "Equivalent Galvanized Gage No." lists the figure "30," and column 3 entitled "Approximate Aluminum B And S Gage" lists the figure "26."
2.4 Sub-row 4 in column 1 lists "Over 14 inches" and in column 2, sub-column "Minimum Thickness (Inches)" lists the figure "0.016", sub-column "Equivalent Galvanized Gage No." lists the figure "28" and column 3 entitled "Approximate Aluminum B And S Gage" lists the figure "24."
      3.   Row 3: Under the first column entitled "Duct Size" are three sub-rows with corresponding dashes or figures that match to each sub-row in the second column and the third column. Those sub-rows and figures are as follows:
3.1 Sub-row 1 in column 1 lists "Exposed rectangular ducts" and in column 2, entitled, "Galvanized," (sub- column "Minimum Thickness (Inches) and sub-column "Equivalent Galvanized Gage No." and in column 3 entitled "Approximate Aluminum B And S Gage" a "dash" is listed instead of a figure.
3.2 Sub-row 2 in column 1 lists "14 inches or less" and in column 2, sub-column "Minimum Thickness (Inches)" lists the figure "0.016", sub-column "Equivalent Galvanized Gage No." lists the figure "28" and column 3 entitled "Approximate Aluminum B And S Gage" lists the figure "24."
3.3 Sub-row 3 in column 1 lists "Over 14 inches" and has a superscript "a" to indicate an associated footnote. In column 2, sub-column "Minimum Thickness (Inches)" lists the figure "0.19", sub-column "Equivalent Galvanized Gage No." lists the figure "26" and column 3 entitled "Approximate Aluminum B And S Gage" lists the figure "22."
      4.   Between the end of the table and footnote "a" is the wording "For SI: 1 inch is equal to 25.4 mm."
      5.   Footnote "a" has been added to read:
         a.   Ductwork that exceeds 20 inches by dimension or exceeds a pressure of 1 inch water gage (250 Pa) shall be constructed in accordance with SMACNA HVAC duct construction standards - metal and flexible.
      TABLE M1601.1.1
      DUCT CONSTRUCTION MINIMUM SHEET METAL
      THICKNESS FOR SINGLE DWELLING UNITS
 
Duct Size
Galvanized
Approximate Aluminum B And S Gage
Minimum Thickness (Inches)
Equivalent Galvanized Gage No.
Round ducts and enclosed
-
-
-
Rectangular ducts
-
-
-
14 inches or less
0.013
30
26
Over 14 inches
0.016
28
24
Exposed rectangular ducts
-
-
-
14 inches or less
0.016
28
24
Over 14 inches a
0.019
26
22
 
For SI: 1 inch = 25.4 mm
   a.    Ductwork that exceeds 20 inches by dimension or exceeds a pressure of 1 inch water gage (250 Pa) shall be constructed in accordance with SMACNA HVAC duct construction standards - metal and flexible.
M1601.4.1 Joints, Seams, And Connections - OUBCC Amendatory. This section has been modified to add a fourth exception for duct systems with sheet metal plenums, Y's and supply boots with liquid applied sealants. This section has been modified to read:
"M1601.4.1 Joints, Seams And Connections.
      1.   Longitudinal and transverse joints, seams and connections in metallic and nonmetallic ducts shall be constructed as specified in SMACNA HVAC duct construction standards-metal and flexible and NAIMA fibrous glass duct construction standards. Joints, longitudinal and transverse seams, and connection in ductwork shall be securely fastened and sealed with welds, gaskets, mastics (adhesive), mastic-plus-embedded-fabric systems, liquid sealants or tapes. Tapes and mastics used to seal fibrous glass ductwork shall be listed and labeled in accordance with UL 181A and shall be marked "181A-P" for pressure- sensitive tape, "181 A-M" for mastic or "181 A-H" for heat sensitive tape.
      2.   Tapes and mastics used to seal metallic and flexible air ducts and flexible air connectors shall comply with UL 181B and shall be marked "181 B-FX" for pressure- sensitive tape or "181 BM" for mastic. Duct connections to flanges of air distribution system equipment shall be sealed and mechanically fastened. Mechanical fasteners for use with flexible nonmetallic air ducts shall comply with UL 181B and shall be marked "181B-C". Crimps joints for round metallic ducts shall have a contact lap of not less than 1 inch (25 mm) and shall be mechanically fastened by means of not less than three sheet-metal screws or rivets equally spaced around the joint.
      3.   Closure systems used to seal all ductwork shall be installed in accordance with the manufacturers' instructions.
Exceptions:
      1.   Spray polyurethane foam shall be permitted to be applied without additional joint seals.
      2.   Where a duct connection is made that is partially inaccessible, three screws or rivets shall be equally spaced on the exposed portion of the joint so as to prevent a hinge effect.
      3.   For ducts having a static pressure classification of less than 2 inches of water column (500 Pa), additional closure systems shall not be required for continuously welded joints and seams and locking-type joints and seams of other than the snap-lock and button-lock types.
      4.   For duct systems with sheet metal plenums, Y's and supply boots, only liquid applied sealants complying with UL 181 BM (mastic or similar) or equivalent method, shall be used to seal inner liners and start collars to plenum and any other seams in system."
IRC 2015 Chapter 19 Special Appliances, Equipment And Systems
M1903.1.1 Electrical Requirements - OUBCC Added. This section has been added to read:
"M1903.1.1 Electrical Requirements. In addition to the requirements of M1903.1, interconnection and all associated wiring shall be installed in accordance with NFPA 70, NEC, 2014, article 692 Fuel Cell Systems."
IRC 2015 Chapter 24 Fuel Gas
G2415.12 Minimum Burial Depth - OUBCC Amendatory. This section has been modified to require all underground piping systems to be installed a minimum of 18 inches below grade. This section has been revised to read:
"G2415.12 Minimum Burial Depth. Underground piping systems shall be installed a minimum depth of 18 inches (457.5 mm) below grade, except as provided for in section G2415.12.1."
IRC 2015 Chapter 25 Plumbing Administration
P2503.4 Building Sewer Testing - OUBCC Amendatory. This section has been modified to clarify that the building sewer test is only necessary when the local authority having jurisdiction requires the testing to be done and to change the building sewer test height requirement from a 10-foot high test to a 5-foot high test. This section has been modified to read:
"P2503.4 Building Sewer Testing.
      1.   When required by local authority having jurisdiction, the building sewer shall be tested by insertion of a test plug at the point of connection with the public sewer, filling the building sewer with water and pressurizing the sewer to not less than 5-foot (1524 mm) head of water. The test pressure shall not decrease during a period of not less than 15 minutes. The building sewer shall be water tight at all points.
      2.   A forced sewer test shall consist of pressuring the piping to a pressure of not less than 5 psi (34.5 kPa) greater than the pump rating and maintaining such pressure for not less than 15 minutes. The forced sewer shall be water tight at all points."
P2503.7 Water-Supply System Testing - OUBCC Amendatory. This section has been modified to delete the word "plastic" and replace it with the terms "PVC" and "CPVC." This section has been modified to read:
"P2503.7 Water-Supply System Testing. Upon completion of the water-supply system or a section of it, the system or portion completed shall be tested and proved tight under a water pressure of not less than the working pressure of the system or, for piping systems other than PVC or CPVC, by an air test of not less than 50 psi (345 kPa). This pressure shall be held for not less than 15 minutes. The water used for tests shall be obtained from a potable water source."
IRC 2015 Chapter 26 General Plumbing Requirements
P2603.4 Pipes Through Foundation Walls - OUBCC Amendatory. This section has been modified to add a requirement for the relieving arch or pipe sleeve to comply with the materials and standards listed in table 3002.1(2). This section has been modified to read:
"P2603.4 Pipes Through Foundation Walls. A pipe that passes through a foundation wall shall be provided with a relieving arch, or a pipe sleeve shall be built into the foundation wall. The relieving arch or pipe sleeve shall conform to one of the materials and standards listed in table P3002.1(2). The sleeve shall be two pipe sizes greater than the pipe passing through the wall."
P2603.5.1 Sewer Depth - OUBCC Amendatory. This section has been modified to include a depth for the septic tank connection unless otherwise approved by the authority having jurisdiction. This section has been modified to read:
"P2603.5.1 Sewer Depth. Building sewers that connect to private sewage disposal systems shall be not less than 12 inches (305 mm) or as approved by the authority having jurisdiction below finished grade at the point of septic tank connection. Building sewers shall be not less than 12 inches (305 mm) below grade."
IRC 2015 Chapter 27 Plumbing Fixtures
P2704.1 General - OUBCC Amendatory. This section has been modified to allow installation of slip joints between the fixture to within 18 inches downstream of the trap outlet seal. This section has been modified to read:
"P2704.1 General. Slip joints shall be made with an approved elastomeric gasket and shall be installed from the fixture to within 18 inches (457 mm) downstream of the trap outlet seal. Fixtures with concealed slip-joint connections shall be provided with an access panel or utility space at least 12 inches (305 mm) in its smallest dimension or other approved arrangement so as to provide access to the slip-joint connections for inspection and repair."
P2709.2 Lining Required - OUBCC Amendatory. This section has been modified to clarify it is only effective where required and to change the distance the lining material must extend from 2 inches to 3 inches (51 mm to 76 mm). This section has been modified to read:
"P2709.2 Lining Required. Where required, the adjoining walls and floor framing enclosed on-site built-up shower receptors shall be lined with one of the following materials:
      1.   Sheet lead.
      2.   Sheet copper.
      3.   Plastic liner material complies with ASTM D 4068 or ASTM D 4551.
      4.   Hot mopping in accordance with section P2709.2.3.
      5.   Sheet-applied load-bearing, bonded waterproof membranes that comply with ANSI A118.10.
The lining material shall extend not less than 3 inches (76 mm) beyond or around the rough jambs and not less than 3 inches (76 mm) above finished thresholds. Sheet- applied load bearing, bonded waterproof membranes shall be applied in accordance with the manufacturer's installation instructions."
P2715.1 Laundry Tray Waste Outlet - OUBCC Amendatory. This section has been modified to replace the word "tub" with the word "tray" in the section heading and section language. This section has been modified to read:
"P2715.1 Laundry Tray Waste Outlet. Each compartment of a laundry tray shall be provided with a waste outlet not less than 11/2 inches (38 mm) in diameter and a strainer or crossbar to restrict the clear opening of the waste outlet."
IRC 2015 Chapter 29 Water Supply And Distribution
P2902.5.3 Lawn Irrigation Systems - OUBCC Amendatory. This section has been modified to add a spill resistant backflow preventer as an option for protection. This section has been modified to read:
"P2902.5.3 Lawn Irrigation Systems. The potable water supply to lawn irrigation systems shall be protected against backflow by an atmospheric vacuum breaker, a pressure vacuum breaker assembly, a spill resistance vacuum breaker or a reduced pressure principle backflow prevention assembly. Valves shall not be installed downstream from an atmospheric vacuum breaker. Where chemicals are introduced into the system, the potable water supply shall be against backflow by a reduced pressure principle backflow prevention assembly."
P2903.10 Hose Bibb - OUBCC Amendatory. This section has been modified to strike the requirement for a stop and waste type valve and the exception. This section has been modified to read:
"P2903.10 Hose Bibb. Hose bibs subject to freezing, including the "frost-proof" type, shall be equipped with an accessible valve inside the building so that they can be controlled and/or drained during cold periods."
P2904.1.1 Required Sprinkler Locations - OUBCC Amendatory. This section has been modified to clarify sprinklers shall only be installed to protect all areas of a townhouse dwelling unit. This section has been modified to read:
"P2904.1.1 Required Sprinkler Locations. Sprinklers shall be installed to protect all areas of a townhouse dwelling unit."
P2906.4 Water Service Pipe - OUBCC Amendatory. This section has been modified to require piping materials not third-party certified for water distribution, to terminate at least 30 inches outside of the exterior wall. It has also been modified to strike the requirement of the termination to be before the full open valve located at the entrance to the structure. This section has been modified to read:
"P2906.4 Water Service Pipe. Water service pipe shall conform to NSF 61 and shall conform to one of the standards indicated in table P2906.4. Water service pipe or tubing, installed underground and outside of the structure, shall have a minimum working pressure rating of not less than 160 pounds per square inch at 73 degrees Fahrenheit (1103 kPa at 23 degrees Celsius). Where the water pressure exceeds 160 pounds per square inch, (1103 kPa), piping material shall have a rated working pressure equal to or greater than the highest available pressure. Water service piping materials not third-party certified for water distribution shall terminate at least 30 inches outside the exterior wall. Ductile iron water service piping shall be cement mortar lined in accordance with AWWA C104/A21.4."
IRC 2015 Chapter 30 Sanitary Drainage
P3003.2 Prohibited Joints - OUBCC Amendatory. This section has been modified to include an exception: for "saddle-type" fittings. This section has been modified to read:
"P3003.2 Prohibited Joints. Running threads and bands shall not be used in the drainage system. Drainage and vent piping shall not be drilled, tapped, burned, or welded. The following types of joints and connections shall be prohibited:
      1.   Cement or concrete.
      2.   Mastic or hot-pour bituminous joints.
      3.   Joints made with fittings not approved for the specific installation.
      4.   Joints between different diameter pipes made with elastomeric rolling O-rings.
      5.   Solvent-cement joints between different types of plastic pipe.
      6.   Saddle-type fittings. Exception: Where approved by the jurisdiction, saddle-type fittings shall be permitted to connect the building sewer to a public sewer."
P3003.9.2 Solvent Cementing - OUBCC Amendatory. This section has been modified to delete the exception that allows for primer to not be used under certain conditions. This section has been modified to read:
"P3003.9.2 Solvent Cementing. Joint surfaces shall be clean and free from moisture. A purple primer that conforms to ASTM F 656 shall be applied. Solvent cement not purple in color and conforming to ASTM D 2564, CSA B 137.3 or CSA B181.2 shall be applied to all joint surfaces. The joint shall be made while the cement is wet, and shall be in accordance with ASTM D 2855. Solvent-cement joints shall be installed above or below ground."
P3008.1 Sewage Backflow - OUBCC Amendatory. This section has been modified by striking the requirements of plumbing fixtures having flood level rims above the elevation of the next upstream manhole cover in the public sewer system and by deleting the exception. This section has been modified to read:
"P3008.1 Sewage Backflow. Where the flood level rims of plumbing fixtures are below the elevation of the manhole cover of the next upstream manhole in the public sewer, the fixtures shall be protected by a backwater valve installed in the building drain, branch of the building drain or horizontal branch servicing such fixtures."
IRC 2015 Chapter 34 General Requirements (Electrical)
E3402.2 Penetrations Of Fire-Resistance-Rated Assemblies - OUBCC Amendatory. This section has been modified to correct the reference section cited from R317.3 to R302.4 (300.21). The section has been modified to read:
"E3042.2 Penetrations Of Fire-Resistance-Rated Assemblies. Electrical installations in hollow spaces, vertical shafts and ventilation or air-handling ducts shall be made so that the possible spread of fire products of combustion will not be substantially increased. Electrical penetrations through fire- resistance-rated walls, partitions, floors or ceilings shall be protected by approved methods to maintain the fire-resistance-rating of the element penetrated. Penetrations of fire-resistance-rated walls shall be limited as specified in section R302.4 (300.21)."
E3403.3 Listing And Labeling - OUBCC Amendatory. This section has been modified to add a requirement to comply with the 2014 edition of the national electrical code (NEC, 2014), NFPA 70. The section has been modified to read:
"E3403.3 Listing And Labeling. Electrical materials, components, devices, fixtures and equipment shall be listed for the application, in accordance with NFPA 70, shall bear the label of an approved agency and shall be installed, and used, or both, in accordance with the manufacturer's installation instructions [110.3(B)]."
E3404.7 Integrity Of Electrical Equipment - OUBCC Amendatory. This section has been modified to allow for the reuse of existing electrical equipment, rather than requiring new replacements when certain conditions are met. This section has been modified to read:
"E3404.7 Integrity Of Electrical Equipment. Internal parts of electrical equipment, including busbars, wiring terminals, insulators and other surfaces, shall not be damaged or contaminated by foreign materials such as paint, plaster, cleaners or abrasives, and corrosive residues. There shall not be any damaged parts that might adversely affect safe operation or mechanical strength of the equipment such as parts that are broken; bent; cut; deteriorated by corrosion, chemical action, or overheating. Foreign debris shall be removed from equipment. Damaged materials, equipment, appliances, and devices shall not be reused unless such elements have been reconditioned, tested, and placed in good and proper working condition and approved by a nationally recognized testing laboratory (NRTL), or by the manufacturer of the equipment. Electrical equipment damaged by natural or man-made events shall be reused only as recommended by the manufacturer of such equipment. [110.12(B)]"
IRC 2015 Chapter 37 Branch Circuit And Feeder Requirements
E3702.3 Fifteen- And 20-Ampere Branch Circuits - OUBCC Amendatory. This section has been modified to provide adequate loads per circuit. This section has been modified to read:
"E3702.3 Fifteen- And 20-Ampere Branch Circuits. A 15- or 20-ampere branch circuit shall be permitted to supply lighting units, or other utilization equipment, or a combination of both. The rating of any one cord-and-plug connected utilization equipment not fastened in place shall not exceed 80 percent of the branch-circuit ampere rating. The total rating of utilization equipment fastened in place, other than luminaries, shall not exceed 50 percent of the branch-circuit ampere rating where lighting units, cord-and-plug connected utilization equipment is not fastened in place, or both, are also supplied. 20-ampere general-purpose branch circuits shall supply a maximum of 10 outlets. 15-ampere general-purpose branch circuits shall supply a maximum of 8 outlets. [210.23(A)(1) and (2)]."
IRC 2015 Chapter 42 Swimming Pools
E4206.4.1 Maximum Voltage - OUBCC Amendatory. This section has been modified to limit the operation of luminaries in swimming pools to the low-voltage contact limits defined in section E4202.1. This section has been modified to read:
"E4206.4.1 Luminaries shall not operate above the low- voltage contact limit as defined in E4202.1. [680.23(A)(4)]."
Appendix X, Swimming Pools, Spas, And Hot Tubs
Appendix X, Swimming Pools, Spas, And Hot Tubs - OUBCC Added, Bixby Added. Appendix X, Swimming Pools, Spas, And Hot Tubs of the international residential code for one- and two-family dwellings, 2015 edition (IRC), is specifically referred to, adopted and made a part of this code, as if fully set out in this chapter:
X101 Swimming Pools, Spas And Hot Tubs - OUBCC Added, Bixby Added. This section header has been added to clarify the sections of text that apply to the general requirements for swimming pools, spas and hot tubs. This section has been added to read:
"X101 Swimming Pools, Spas And Hot Tubs."
X101.1 General - OUBCC Added, Bixby Added. This section has been added to clarify the design and construction of swimming pools, spas, and hot tubs installed in or on the lot of a one- or two-family dwelling. This section has been added to read:
"X101.1 General. The provisions of this appendix shall control the design and construction of swimming pools, spas and hot tubs installed in or on the lot of a one- or two-family dwelling."
X101.2 Pools In Flood Hazard Areas - OUBCC Added, Bixby Added. This section has been added to require all pools located in flood hazard areas comply with section X101.2.1 or X101.2.2. This section has been added to read:
"X101.2 Pools In Flood Hazard Areas. Pools that are located in flood hazard areas established by table R301.2(1), including above-ground pools, on-ground pools, and in-ground pools that involve placement of fill, shall comply with sections X101.2.1 or X101.2.2.
Exception: Pools located in riverine flood hazard areas which are outside of designated floodways."
X101.2.1 Pools Located In Designated Floodways - OUBCC Added, Bixby Added. This section has been added to require documentation to demonstrate the pool construction will not increase the design flood elevation at any point in Bixby for all pools located in designated floodways. This section has been added to read:
"X101.2.1 Pools Located In Designated Floodways. Where pools are located in designated floodways, documentation shall be submitted to the building official, which demonstrates that the construction of the pool will not increase the design flood elevation at any point within Bixby."
X101.2.2 Pools Located Where Floodways Have Not Been Designated - OUBCC Added, Bixby Added. This section has been added to require the applicant to provide a floodway analysis to demonstrate that the proposed pool will minimally increase the design flood elevation at any point within the jurisdiction, when the pool will be located where design flood elevations are specified by floodways. This section has been modified to read:
"X101.2.2 Pools Located Where Floodways Have Not Been Designated. Where pools are located where design flood elevations are specified but floodways which have not been designated, the applicant shall provide a floodway analysis that demonstrates that the proposed pool will not increase the design flood elevation more than 1 foot (305 mm) at any point within the jurisdiction."
X102 Definitions - OUBCC Added, Bixby Added. This section heading has been added to clarify the section of text that applies to the definitions. This header has been added to read:
"X102 Definitions."
X102.1 General - OUBCC Added, Bixby Added. This section has been added to define specific terms to be utilized in this appendix as set forth in chapter 2. This section has been modified to read:
"X102.1 General. For the purposes of these requirements, the terms used shall be defined as follows and as set forth in chapter 2.
Above-Ground/On-Ground Pool - OUBCC Added, Bixby Added. See "Swimming Pool."
Barrier - OUBCC Added, Bixby Added. A fence, wall, building wall or combination thereof which completely surrounds the swimming pool and obstructs access to the swimming pool.
Hot Tub - OUBCC Added, Bixby Added. See "Swimming Pool."
In-Ground Pool - OUBCC Added, Bixby Added. See "Swimming Pool."
Residential - OUBCC Added, Bixby Added. That which is situated on the premises of a detached one- or two-family dwelling or a one-family townhouse not more than three stories in height.
Spa, Nonportable - OUBCC Added, Bixby Added. See "Swimming Pool."
Spa, Portable - OUBCC Added, Bixby Added. A nonpermanent structure intended for recreational bathing, in which all controls, water-heating and water-circulating equipment are an integral part of the product.
Swimming Pool - OUBCC Added, Bixby Added. Any structure intended for swimming or recreational bathing that contains water over 24 inches (610 mm) deep. This includes in-ground, above-ground, and on-ground swimming pools, hot tubs and spas.
Swimming Pool, Indoor - OUBCC Added, Bixby Added. A swimming pool which is totally contained within a structure and surrounded on all four sides by the walls of the enclosing structure.
Swimming Pool, Outdoor - OUBCC Added, Bixby Added. Any swimming pool which is not an indoor pool."
X103 Swimming Pools - OUBCC Added, Bixby Added. This section header has been added to clarify the sections of text that apply specifically to in-ground, above-ground and on-ground swimming pools. This heading has been added to read:
"X103 Swimming Pools."
X103.1. In-Ground Pools - OUBCC Added, Bixby Added. This section has been added to list the specifications to which all in-ground pools shall be designed and constructed. This section has been added to read:
"X103.1 In-Ground Pools. In-ground pools shall be designed and constructed in conformance with ANSI/NSPI-5 as listed in section X108."
X103.2 Above-Ground And On-Ground Pools - OUBCC Added, Bixby Added. This section has been added to list the specifications to which all above-ground and on-ground pools shall be designed and constructed. This section has been added to read:
"X103.2 Above-Ground And On-Ground Pools. Above-ground and on-ground pools shall be designed and constructed in conformance with ANSI/NSPI-4 as listed in section X108."
X103.3 Pools In Flood Hazard Areas - OUBCC Added, Bixby Added. This section has been added to specify the specifications to which all pools located in flood hazard areas shall be designed and constructed to. This section has been added to read:
"X103.3 Pools In Flood Hazard Areas. In flood hazard areas established by table R301.2(1), pools in costal high hazard areas shall be designed and constructed in conformance with ASCE 24."
X104 Spas And Hot Tubs - OUBCC Added, Bixby Added. This section header has been added to clarify the sections of this appendix that apply specifically to spas and hot tubs. This section heading has been added to read:
"X104 Spas And Hot Tubs."
X104.1 Permanently Installed Spas And Hot Tubs - OUBCC Added, Bixby Added. This section has been added to specify the requirements for the design and construction of permanently installed spas and hot tubs. This section has been added to read:
"X104.1 Permanently Installed Spas And Hot Tubs. Permanently installed spas and hot tubs shall be designed and constructed in conformance with ANSI/NSPI-3 as listed in section X108."
X104.2 Portable Spas And Hot Tubs - OUBCC Added, Bixby Added. This section has been added to specify the requirements for the design and construction of portable spas and hot tubs. This section has been added to read:
"X104.2 Portable Spas And Hot Tubs. Portable spas and hot tubs shall be designed and constructed in conformance with ANSI/NSPI-6 as listed in section X108."