The Hawaii State Residential Code, as adopted by the State of Hawaii on November 13, 2018, which adopts, with modifications, the International Residential Code for One- and Two-Family Dwellings, 2012 Edition (Eighth Printing) (IRC), published by the International Code Council, Inc., 500 New Jersey Avenue, NW, 6th Floor, Washington, DC 20001, is adopted by reference and made a part hereof, subject to the following amendments:
(1) Amending Section R101.1. Section R101.1 is amended to read:
R101.1 Title. These provisions shall be part of the Building Code of the City and County of Honolulu, and will be referred to herein as “this code”.
(2) Amending Section R101.2. Section R101.2 is amended to read:
R101.2 Scope. The provisions of the International Residential Code for One- and Two-Family Dwellings will be permitted as an alternative to the International Building Code to apply to the construction, alteration, movement, enlargement, replacement, repair, equipment, use and occupancy, location, removal, and demolition of detached one- and two-family
dwellings and multiple single-family dwellings (townhouses) not more than two stories in height with a separate means of egress and their accessory structures. A townhouse is a single-family dwelling unit constructed in a group of three or more attached units in which each unit extends from the foundation to roof and with open space on at least two sides. For patio covers, the provisions of Appendix H are made a part of the Residential Code. For R-3 one- and two-family dwellings used as care homes, the provisions of Appendix M are made a part of the Residential Code.
(3) Amending Section R102.7. Section R102.7 is amended to read:
R102.7 Existing Structures. The legal occupancy of any structure existing on the date of adoption of this code is permitted to continue without change, except as is specifically covered in this code or the Fire Code, or as is deemed necessary by the building official for the general safety and welfare of the occupants and the public.
(4) Adding Subsection R103.1. Subsection R103.1 is added to read:
R103.1 General. Code enforcement agency will be in accordance with International Building Code Section 103.
(5) Amending Subsection R104.11. Subsection R104.11 is amended to read:
R104.11 Alternative materials, design, and methods of construction and equipment. The provisions of this code are not intended to prevent the installation of any material or to prohibit any design or method of construction not specifically prescribed by this code, provided that any such alternative has been approved. An alternative material, design or method of construction shall be approved where the building official finds that the proposed design is satisfactory and complies with the intent of the provisions of this code, and that the material, method or work offered is, for the purpose intended, at least the equivalent of that prescribed in this code. Compliance with the specific performance-based provisions of the International Codes in lieu of specific requirements of this code shall also be permitted as an alternative.
The building official may use the most current code edition or standard of the International Code Council or other approved national standard as an alternative to meeting the requirements of this code.
(6) Amending Section R105.1. Section R105.1 is amended to read:
R105.1 Required. A building permit is required to perform work covered by this code as provided in ROH Chapter 18.
(7) Amending Subsection R105.8. Subsection R105.8 is amended to read:
R105.8 Responsibility. It is the duty of every person who performs work for the installation, alteration, or repair of a building, structure, electrical, gas, mechanical or plumbing system, for which this code is applicable, to comply with this code.
(8) Amending Subsection R106.1. Subsection R106.1 is amended to read:
R106.1 Submittal documents. See ROH Chapter 18. In addition to the requirements of the plot plan required in ROH Chapter 18, the construction documents submitted with the application for a permit must be accompanied by a site plan showing to scale the size and location of new construction and existing structures on the site plan showing to scale the size of and location of the new construction and distances from lot lines. In the case of demolition, the site plans must show construction to be demolished and the location and size of existing structures and construction that are to remain on the site or plot.
(9) Amending Subsection R106.1.3. Subsection R106.1.3 is amended to read:
R106.1.3 Information for construction in flood hazard areas. For buildings and structures in flood hazard areas as established by ROH Chapter 21A, construction documents will include:
1. Delineation of flood hazard areas, floodway boundaries, flood zones, and the design flood elevation, as appropriate;
2. The elevation of the proposed lowest floor, including basement; in areas of shallow flooding (AO zones), the height of the proposed lowest floor, including basement, above the highest adjacent grade;
3. The elevation of the bottom of the lowest horizontal structural member in coastal high hazard areas (V Zone); and
4. If design flood elevations are not included on the community’s Flood Insurance Rate Map (FIRM), the applicant must submit a flood study, flood data, and other pertinent information as required by ROH Chapter 21 or 21A, prepared by a licensed design professional to the Building Official.
(10) Adding Subsection R107.5. Subsection R107.5 is added to read:
R107.5 Stormwater management. Storm water management practices for residential uses include, but not limited to, reducing the total runoff generated on the site by reducing the total impervious surface area of the lot.
R107.5.1 Maximum impervious surface. The impervious surface area shall not exceed 75 percent of the total zoning lot area for construction of a one-family or two-family detached dwelling or duplex, pursuant to ROH Chapter 21.
(11) Amending Subsections R109.1 to R109.4. Subsections R109.1 to R109.4 are amended to read:
R109.1 Types of Inspections. Inspections must be in accordance with the International Building Code Section 110.1.
R109.2 Required inspections. The building official, upon notification from the permit holder or the permit holder’s agent, shall make the following inspections and shall either approve that portion of the construction as completed or notify the permit holder or the permit holder’s agent if the same fails to comply with this code.
R109.2.1 Floodplain inspections. For construction in areas prone to flooding as established by ROH Chapter 21A, upon placement of the lowest floor, including basement, and prior to further vertical construction, the building official shall require submission of documentation, prepared and sealed by a land surveyor, licensed in the State of Hawaii, of the elevation of the lowest floor, including basement, required in Section R106.
R109.2.2 Fire-resistance-rated construction inspection. When fire-resistance-rated construction is required between dwelling units or due to locate on property, an inspection of such construction, after all lathing and/or wallboard is in place, but before any plaster is applied, or before wallboard joints and fasteners are taped and finished.
R109.2.3 Final inspections. Final inspections must be made after the permitted work is complete and prior to final occupancy.
R109.2.4 Other inspections. In addition to the inspections specified in Sections R109.2.1 through R109.2.3, the building official is authorized to make or require other inspections of any construction work to ascertain compliance with the provisions of this code and other laws that are enforced by this code.
R109.3 Special inspections. Where application is made for construction as described in this section, the owner shall employ one or more special inspectors, independent of the contractors performing the work, to provide inspections during construction on the types of work listed under Sections R109.3.1 and R109.3.5. These inspections are in addition to the inspections specified in Section R109. The special inspector must be a qualified person who must demonstrate competence to the satisfaction of the building official, to conduct inspections of the particular type of construction or operation requiring special inspection. The building official may impose reasonable fees to cover the cost to conduct examinations in licensing of special inspectors and issuance of registration cards.
Exceptions:
1. The building official may waive the requirements for the employment of a special inspector if the construction is of a minor nature.
2. The employment of a special inspector is not required for construction work for any government agency that provides for its own inspections.
3. Special inspections are not required for building components unless the design involves the practice of professional engineering or architecture as defined by HRS 464.
R109.3.1 Special Inspections for wind requirements. Special inspections are required for buildings and structures constructed where the 3-second-gust effective ultimate design wind speed is 120 mph (53 m/sec) or greater.
R109.3.1.1 Structural wood. Continuous special inspection is required during field gluing operations of elements of the main windforce-resisting system. Periodic special inspection is required for nailing, bolting, anchoring and other fastening of components within the main windforce-resisting system, including wood shear walls, wood diaphragms, drag struts, braces, and hold-downs.
Exception: Special inspection is not required for wood shear walls, shear panels and diaphragms, including nailing, bolting, anchoring, and other fastening to other components, of the main windforce-resisting system, where the fastener spacing of the sheathing is more than 4 inches (102 mm) on center.
R109.3.1.2 Cold-formed steel light-frame construction. Periodic special inspection is required during welding operations of elements of the main windforce-resisting system. Periodic special inspection is required for screw attachment, bolting, anchoring, and other fastening of components within the main windforce-resisting system, including shear walls, braces, diaphragms, collectors (drag struts), and hold-downs.
Exceptions: A special inspection is not required for cold-formed steel light-frame shear walls, braces, diaphragms, collectors (drag struts) and hold-downs where either of the following applies:
1. The sheathing is gypsum board or fiberboard.
2. The sheathing is wood structural panel or steel sheets on only one side of the shear wall, shear panel, or diaphragm assembly and the fastener spacing of the sheathing is more than 4 inches (102 mm) on center (o.c.).
R109.3.1.3 Wind-resisting components. Periodic special inspection is required for the following systems and components:
1. Roof cladding.
2. Wall cladding.
R109.3.2 Termite protection. Termite barrier, treated structural lumber and pipe penetrations for new wood frame residential buildings.
R109.3.3 Automatic fire protection systems. Where an application is made for automatic fire sprinkler systems, the systems must be inspected and evaluated in accordance with the requirements of NFPA 13D.
R109.3.4 Concrete construction. The special inspections and verifications for concrete construction must be in accordance with this code.
Exceptions: Special inspections are not required for:
1. Foundation concrete for structures permitted to be designed under the International Residential Code.
2. Concrete footings supporting buildings three stories or less in height that are fully supported on earth or rock where the structural design is based on a specified compressive strength f’c no greater than 2,500 pounds per square inch (psi) (17.2 MPa), regardless of the compressive strength specified in the construction documents or used in the footing construction. Periodic inspection of the reinforcing for all concrete footings will be required.
3. Nonstructural concrete slabs supported directly on the ground, including pre-stressed slabs on grade, where the effective pre-stress in the concrete is less than 150 psi (1.03 MPa).
4. Concrete foundation walls constructed in accordance with Table B1805.5 (1), B1805.5 (2), B1805.5 (3), or B1805.5 (4).
5. Concrete patios, driveways and sidewalks, on grade.
R109.3.5 Floodplain construction. See ROH Chapter 21A.
R109.4 Building permit requirement. Where special inspection or testing is required by Section R109.3, the construction drawings must include a complete list of special inspections required by this section.
(12) Adding Subsections R109.5 to 109.7. Subsections R109.5 to R109.7 are added to read:
R109.5 Statement of special inspections. The applicant shall submit a statement of special inspections in accordance with Section R109.7 as a condition for permit issuance.
R109.6 Contractor responsibility. When special inspection is required, a contractor’s statement must be submitted containing an acknowledgement of awareness of the special inspection requirements contained on the drawings and that the construction requiring special inspections must be made accessible for inspections.
R109.7 Report requirement. The licensed engineer or architect of record shall submit a final signed report stating that they have received all the special inspection reports and documenting that there are no known unresolved code requirements that create significant public safety deficiencies.
(13) Amending Subsection R110.1. Subsection R110.1 is amended to read:
R110.1 Use and occupancy. No building or structure may be used or occupied, and no change in the existing occupancy classification of a building or structure or portion thereof may be made until the building official has issued a certificate of occupancy therefor as provided herein. Issuance of a certificate of occupancy will not be construed as approval of a violation of the provisions of this code or other ordinances of the jurisdiction.
Exceptions:
1. Certificates of occupancy are not required for work exempt from permits under Section R105.2.
2. Accessory buildings or structures.
(14) Amending Subsection R110.3. Subsection R110.3 is amended to read:
R110.3 Certificate issued. After the building official inspects the building or structure and finds no violations of the provisions of this code or other laws that are enforced by the department, the building official shall issue a certificate of occupancy, which must contain the following:
1. The building permit number.
2. The address of the structure.
3. The name and address of the owner.
4. A description of the structure or portion thereof for which the certificate is issued.
5. A statement that the described structure or portion thereof has been inspected for compliance with the requirements of this code.
6. The name of the building official.
7. The edition of the building code under which the permit was issued.
8. Whether an automatic sprinkler system is provided.
9. Any special conditions for the permit.
(15) Amending Subsection R110.4. Subsection R110.4 is amended to read:
R110.4 Temporary occupancy. The building official may issue a temporary certificate of occupancy before the completion of the entire work covered by the permit, provided that such portion or portions can be occupied safely and are in compliance with the requirements of this code. The building official will set a time period during which the temporary certificate of occupancy is valid.
(16) Amending Subsection R110.5. Subsection R110.5 is amended to read:
R110.5 Revocation. The building official may suspend or revoke a certificate of occupancy issued under the provisions of this code whenever the certificate is issued in error, or on the basis of incorrect information provided, or where it is determined that the structure or a portion thereof violates any ordinance or regulation or any of the provisions of this code.
(17) Amending Subsection R112.1. Subsection R112.1 is amended to read:
R112.1 General. Board of Appeals must be in accordance with International Building Code Section 113.
(18) Amending Section R113. Section R113 is amended to read:
SECTION R113 - VIOLATIONS AND PENALTIES
For violation and penalty provisions, see ROH Chapter 16, Article 10.
(19) Amending Section R202. Section R202 is amended as follows:
a. By adding immediately after “ACCESSIBLE, READILY” the following definition to read:
ACCESSORY DWELLING UNIT (ADU) means a second dwelling unit, including separate kitchen, bedroom, and bathroom facilities, attached or detached from the primary dwelling unit on the zoning lot.
b. By amending the definition of “BUILDING, EXISTING” to read:
BUILDING, EXISTING is a building for which a legal building permit has been issued, or one which complied with the building code in effect at the time the building was erected.
c. By adding the following definitions:
BUILDING, ENCLOSED: A building that does not comply with the requirements for open or partially enclosed building.
BUILDING, OPEN: A building having each wall at least 80 percent open. A
o ≥ 0.8 A
g where:
Ao = total area of openings in a wall that receives positive external pressure, in ft² (m²)
Ag = the gross area of that wall in which Ao is identified, in ft² (m²)
BUILDING, PARTIALLY ENCLOSED: A building that complies with both of the following conditions:
1. The total area of openings in a wall that receives positive external pressure exceeds that sum of the areas of openings in the balance of the building envelope (walls and roof) by more than 10 percent.
2. The total area of openings in a wall that receives positive external pressure exceeds 4 ft2 (0.37 m2) or 1 percent of the area of that wall, whichever is smaller, and the percentage of openings in the balance of the building envelope does not exceed 20 percent.
These conditions are expressed by the following equations:
1. Ao > 1.1A
oi
2. Ao > 4 ft
2 (0.37 m
2) or > 0.01 A
g, whichever is smaller, and A
oi/A
gi ≤ 0.20
Where:
Ao,A
q are defined for open building.
Aoi = the sum of the areas of openings in the building envelope (walls and roof) not including A
o, in ft
2 (m
2).
Agi = the sum of the gross surface areas of the building envelope (walls and roof) not including A
g, in ft
2 (m
2).
d. By amending the definition of “BUILDING OFFICIAL” to read:
BUILDING OFFICIAL means the director of planning and permitting of the city or the director’s authorized representative.
e. By adding definitions of “CARPORT” after “CAP PLATE” to read:
CARPORT is a private garage which is at least 100 percent open on one side and with 50 percent net openings on another side or which is provided with an equivalent of such openings on two or more sides.
A private garage that is 100 percent open on one side and 25 percent open on another side with the latter opening so located to provide adequate cross ventilation may be considered a carport when approved by the building official.
f. By amending the definition of “KITCHEN” to read:
KITCHEN is as defined in the ROH Chapter 21.
g. By amending the definition of “THIRD-PARTY CERTIFICATION AGENCY” to read:
THIRD-PARTY CERTIFICATION AGENCY. An approved agency operating a product or material certification system that incorporates initial product testing, assessment and surveillance of a manufacturer’s quality control system. An approved agency may be an individual who has been qualified by the department to perform single-family residential plans review for code compliance, by having the necessary qualifications and passing an examination administered by the building official with a qualifying score to review for single-family residential building permit requirements.
h. By amending the definition of “THIRD PARTY CERTIFIED” to read:
THIRD PARTY CERTIFIED. Either a certification obtained by a manufacturer indicating that the function and performance characteristics of a product or material have been determined by testing and ongoing surveillance by an approved third-party certification agency; or a certification of code compliance from an approved third party residential plans reviewer, upon a form provided by the building official for compliance with the requirements necessary to obtain a building permit. Manufacturer assertion of certification is in the form of identification in accordance with the requirements of the third-party certification agency.
(20) Amending Subsection R301.1.1. Subsection R301.1.1 is amended to read:
R301.1.1 Alternative provisions. As an alternative to the requirements in Section R301.1 the following standards are permitted subject to this code and the limitations therein. Where engineered design is used in conjunction with these standards, the design shall comply with the International building code. Where these standards use the basic wind speed as a design criterion, the Effective Ultimate Design Wind Speed Veff-ult, determined from Figures R301.2(8) shall be used.
1. AF&PA Wood Frame Construction Manual (WFCM) 2012.
2. AISI Standard for Cold-Formed Steel Framing - Prescriptive Method for One-and Two-Family Dwellings (AISI S230-2015).
3. ICC Standard for Residential Construction in High-Wind Regions (ICC 600-14).
4. ASCE Minimum Design Loads for Buildings and Other Structures (ASCE 7-10).
5. State Building Code, as amended.
(21) Adding Subsection R301.1.4. Subsection R301.1.4 is added to read:
R301.1.4 Complete load path and uplift ties. Blocking, bridging, straps, approved framing anchors, or mechanical fasteners must be designed and installed to provide continuous ties from the roof to the foundation system. Sheet metal clamps, ties, or clips, must be formed of galvanized steel or other approved corrosion-resistant material not less than 0.040 inch (1.01 mm) nominal thickness. Uplift resistance must be in accordance with Table R802.11.
(22) Amending Table R301.2 (1). Table R301.2 (1) is amended to read:
TABLE R301.2(1)
CLIMATIC AND GEOGRAPHIC DESIGN CRITERIA
CLIMATIC AND GEOGRAPHIC DESIGN CRITERIA
WIND SPEED (mph) | SEISMIC DESIGN CATEGORY | SUBJECT TO DAMAGE FROM | FLOOD HAZARDS | ||
Weathering | Termite | Decay | |||
Per Figure R301.2(8) | C or Do |
Negligible | Very heavy | Moderate to severe | FEMA |
(23) Amending Subsection R301.2.1. Subsection R301.2.1 is amended to read:
R301.2.1 Wind design criteria. Buildings and portions thereof must be constructed in accordance with the wind provisions as specified in Table R301.2.1 using the effective ultimate design wind speed, Veff-ult, determined from Figure R301.2(8). Buildings and portions thereof constructed in accordance with the wind provisions of the State Building Code, as amended, are deemed to comply with this section.
(24) Adding Table R301.2.1. Table R301.2.1 is added to read:
TABLE R301.2.1 | |||
WIND SPEED BASED ON APPLICABLE WIND DESIGN CRITERIA | |||
Effective Ultimate Design Wind Speed a | Effective Nominal Design Wind Speed b | Wind Provisions c |
Windborne Debris Protection |
V
eff-ult < 130 | V
eff-asd < 102 | Residential Code c |
Not required |
130 ≤ V
eff-ult < 139 | 102 ≤ V
eff-asd < 110 | Residential Code c |
Required |
139 ≤ V
eff-ult | 110 ≤ V
eff-asd | Alternative Provisions d |
Required |
a The Effective Ultimate Design Wind Speed, Veff-ult, is obtained from Figure R301.2(8). The wind speed shown in these figures include topographic effects and is based on the basic wind speed definition used for structural design of buildings in the 2012 IBC, ASCE7-10 and Section 16-1.1.
b Wind speed conversion to the Effective Nominal Design Wind Speed, Veff-asd is in accordance with section R301.2.1.3.
c Where the Residential Code requires the Basic Wind Speed, the Effective Nominal Design Wind Speed, Veff-asd, is used.
d The applicability of the wind design provisions of the Residential Code are exceeded and will not be used. R301.1.1 Alternative provisions provides a list of other codes and standards that will be used in conjunction with applicable requirements of the Residential Code to complete the design.
The structural provisions of this code for wind loads are not permitted where wind design is required as specified in Section R301.2.1.1. Where different construction methods and structural materials are used for various portions of a building, the applicable requirements of this section for each portion apply. Where not otherwise specified, the wind loads listed in Table R301.2(2) adjusted for height and exposure using Table R301.2(3) must be used to determine design load performance requirements for wall coverings, curtain walls, roof coverings, exterior windows, skylights, garage doors, and exterior doors. Asphalt shingles must be designed for wind speeds in accordance with Section R905.2.4. A continuous load path shall be provided to transmit the applicable uplift forces in Section R802.11.1 from the roof assembly to the foundation.
(25) Amending Subsection R301.2.1.1. Subsection R301.2.1.1 is amended to read:
R301.2.1.1 Wind limitations and wind design required. The wind provisions of this code do not apply to the design of buildings where wind design is required in accordance with Figure R301.2(4)B.
Exceptions:
1. For concrete construction, the wind provisions of this code apply in accordance with the limitation of Sections R404 and R611.
2. For structural insulated panels, the wind provisions of this code apply in accordance with the limitations of Section R613.
In regions where wind design is required in accordance with Figure R301.2(4)B, the design of buildings for wind loads must be in accordance with one or more of the following methods:
1. AF&PA Wood Frame Construction Manual (WFCM);
2. ICC Standard for Residential Construction in High-Wind Regions (ICC 600);
3. ASCE Minimum Design Loads for Buildings and Other Structures (ASCE 7);
4. AISI Standard for Cold-Formed Steel Framing-Prescriptive Method For One- and Two-Family Dwellings (AISI S230); or
5. International Building Code as amended.
The elements of design not addressed by the methods in Items 1 through 5 will be in accordance with the provisions of this code. When ASCE 7 or the International Building Code is used, the wind speed map and exposure category requirements as specified in ASCE 7 and the International Building Code are used.
(26) Amending Subsection R301.2.1.2. Subsection R301.2.1.2 is amended to read:
R301.2.1.2 Protection of openings. Windows in buildings located in windborne debris regions must have glazed openings protected from windborne debris. Glazed opening protection for windborne debris must meet the requirements of the Large Missile Test of ASTM E 1996 and of ASTM E 1886 referenced therein.
Exceptions:
1. Wood structural panels with a minimum thickness of 7/16 inch (11 mm) and a maximum panel span of 8 feet (2,438 mm) are permitted for opening protection in one- and two-story buildings classified as Group R-3 or R-4 occupancy. Panels must be precut so that they are attached to the framing surrounding the opening containing the product with the glazed opening. Panels must be predrilled as required for the anchorage method and will be secured with the attachment hardware provided and anchors permanently installed on the building. Attachment in accordance with Table R301.2.1.2 with corrosion-resistant attachment hardware provided and anchors permanently installed on the building is permitted for buildings with a mean roof height of 33 feet (10,058 mm) or less, where effective ultimate design wind speeds, V
eff-ult do not exceed 175 mph (78 m/s).
2. Glazing in accessory structures to the single family dwellings including but not limited to greenhouses and minor storage sheds.
3. Partially enclosed Occupancy R-3 buildings are permitted to be designed without wind-borne debris protection. Partially enclosed and open Occupancy R-3 buildings must also include a residential safe room in accordance with ROH Chapter 16, Article 13.
TABLE R301.2.1.2 | |||
WINDBORNE DEBRIS PROTECTION FASTENING SCHEDULE FOR WOOD STRUCTURAL PANELS a, b, c, d | |||
FASTENER TYPE | FASTENER SPACING | ||
Panel span ≤ 4 foot | Panel span > 4 foot and ≤ 6 foot | Panel span > 6 foot and ≤ 8 foot | |
TABLE R301.2.1.2 | |||
WINDBORNE DEBRIS PROTECTION FASTENING SCHEDULE FOR WOOD STRUCTURAL PANELS a, b, c, d | |||
FASTENER TYPE | FASTENER SPACING | ||
Panel span ≤ 4 foot | Panel span > 4 foot and ≤ 6 foot | Panel span > 6 foot and ≤ 8 foot | |
No. 8 Wood screw based anchor with 2-inch embedment length | 16" | 10" | 8" |
No. 10 Wood screw based anchor with 2-inch embedment length | 16" | 12" | 9" |
¼-inch lag screw based anchor with 2-inch embedment length | 16" | 16" | 16" |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, | |||
1 pound = 0.454 kg, 1 mile per hour = 0.447 m/s. | |||
a. This table is based on 175 mph effective ultimate design wind speed and a mean roof height of 45 feet.
b. Fasteners must be installed at opposing ends of the wood structural panel. Fasteners must be located a minimum of 1 inch from the edge of the panel.
c Anchors must penetrate through the exterior wall covering with an embedment length of 2 inches minimum into the building frame. Fasteners must be located a minimum of 2-½ inches from the edge of concrete block or concrete.
d. Where screws are attached to masonry or masonry/stucco, they must be attached utilizing vibration-resistant anchors having a minimum ultimate withdrawal capacity of 1,500 pounds.
(27) Amending Subsection R301.2.1.3. Subsection R301.2.1.3 is amended to read:
R301.2.1.3 Wind speed conversion. When referenced documents are based on fastest mile wind speeds, V
fm, or three second gust effective nominal wind speeds, V
eff-asd, the effective ultimate design wind speed, V
eff-ult, obtained from Figures R301.2(8) must be converted using Table R301.2.1.3.
TABLE R301.2.1.3 | ||||||||||||||
CONVERSION OF EQUIVALENT BASIC SPEEDS a,b,c | ||||||||||||||
V
eff-ult |
107 | 114 | 120 | 126 | 133 | 139 | 152 | 158 | 164 | 177 | 183 | 190 | 202 | 215 |
V
eff-asd |
85 | 90 | 95 | 100 | 105 | 110 | 120 | 125 | 130 | 140 | 145 | 150 | 160 | 170 |
V
fm |
71 | 76 | 80 | 85 | 90 | 95 | 104 | 109 | 114 | 123 | 128 | 133 | 142 | 152 |
For SI: 1 mile per hour = 0.447 m/s. | ||||||||||||||
a. Linear interpolation is permitted.
b. Veff-asd = Effective nominal design wind speed applicable to methods specified in Exceptions 1 through 5 of Section 1609.1.1 of the International Building Code. V
eff-asd = 0.791 V
eff-ult
c. Veff-ult = Effective ultimate design wind speed from Table R301.2(8)
(211) Amending Figure R301.2 (8). Figure R301.2 (8) is amended to read:
(28) Amending Subsection R301.2.1.4. Subsection R301.2.1.4 is amended to read:
R301.2.1.4 Exposure category. The exposure category is determined from Figure R301.2 (9) or using the provisions of ASCE 7-10.
(29) Amending Figure R301.2 (9). Figure R301.2 (9) is amended to read:
(30) Amending Subsection R301.2.1.5. Subsection R301.2.1.5 is amended to read:
R301.2.1.5 Topographic wind effects. Topographic wind speed effects must be considered in the design of the building. Buildings designed using the effective ultimate wind speed as determined from Figure R301.2 (8) and wind exposure categories determined in accordance with Section R301.2.1.4 will be deemed to comply with this section.
(31) Amending Subsection R302.1. Subsection R302.1 is amended to read:
R302.1 Exterior walls. Construction, projections, openings, and penetrations of exterior walls of dwellings and accessory buildings must comply with Table R302.1(1); or dwellings equipped throughout with an automatic sprinkler system installed in accordance with Section P2904 must comply with Table R302.1(2). Dwellings equipped throughout with an automatic sprinkler system installed in accordance with Section P2904 or NFPA 13D must comply with Table R302.1(2).
(32) Amending Table R302.1(2). Table R302.1(2) is amended to read:
TABLE R302.1(2) | |||
EXTERIOR WALLS - DWELLINGS WITH FIRE SPRINKLERS | |||
EXTERIOR WALL ELEMENT | MINIMUM FIRE-RESISTANCE RATING | MINIMUM FIRE SEPARATION DISTANCE | |
TABLE R302.1(2) | |||
EXTERIOR WALLS - DWELLINGS WITH FIRE SPRINKLERS | |||
EXTERIOR WALL ELEMENT | MINIMUM FIRE-RESISTANCE RATING | MINIMUM FIRE SEPARATION DISTANCE | |
Walls | (Fire-resistance rated) | 1 hour-tested in accordance with ASTM E 119 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 | < 2 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 R317.3 | < 3 feet |
None required | 3 feet | ||
For SI: 1 foot = 304.8 mm. | |||
N/A = Not Applicable. | |||
(33) Amending Subsection R302.3. Subsection R302.3 is amended by adding a third exception to read:
3. An accessory dwelling unit (ADU) is permitted to be separated from the primary dwelling unit with a single layer of 5/8-inch Type X gypsum board or the equivalent fire resistive construction on the walls and ceilings of the ADU portion.
(34) Amending Subsection R303.1. Subsection R303.1 is amended to read:
R303.1 Natural light and ventilation. Natural light and ventilation must be as specified in the Housing Code.
(35) Amending Subsection R303.3. Subsection R303.3 is amended to read:
R303.3 Bathrooms. Light and ventilation for bathrooms must be as specified in the Housing Code.
(36) Amending Subsection R303.4. Subsection R303.4 is amended to read:
R303.4 Mechanical ventilation. Mechanical ventilation must be as specified in the Housing Code.
(37) Amending Section R306. Section R306 is amended to read:
SECTION R306 - SANITATION
Sanitation must be as specified in the Housing Code.
(38) Amending Subsection R309.2. Subsection R309.2 is amended to read:
R309.2 Carports. Carport floor surfaces must be of approved noncombustible materials.
Exceptions:
1. Asphalt surfaces are permitted at ground level in carports.
2. A carport on a hillside lot serving a detached single-family dwelling may have wood floor planking at least 2 inches (51 mm) in nominal thickness laid with at least ¼-inch (6.4 mm) spacing between the planks.
The area of floor used for parking of automobiles or other vehicles must be sloped to facilitate the movement of liquids to a drain or toward the main vehicle entry doorway.
(39) Amending Subsection R309.3. Subsection R309.3 is amended to read:
R309.3 Flood hazard areas. See ROH Chapter 16, Article 11.
(40) Amending Subsection R310.1.1. Subsection R310.1.1 is amended by adding a second exception to read:
2. Non-safety glazed glass jalousie bladed windows may be used for emergency escape or rescue.
(41) Amending Subsection R311.7.1. Subsection R311.7.1 is amended by adding a second exception to read:
2. Private stairways serving an occupant load of less than 5 must not be less than 30 inches (762 mm) in width.
(42) Adding Subsection R313.2.2. Subsection R313.2.2 is added to read:
R313.2.2 R-3 Care homes. An automatic residential fire sprinkler system must be installed in one- and two-family dwellings in new care homes.
(43) Adding Subsection R313.2.3. Subsection R313.2.3 is added to read:
R313.2.3 One- and two-family dwellings with private water systems. Where the source of water for a one- or two-family dwelling is solely from a private system, an automatic fire sprinkler system must be installed. Water supply from a tank will conform to NFPA 22 and have a capacity of a minimum of 10,000 gal. (37,854 liters).
Exception: Where approved by the fire code official.
(44) Adding Subsection R313.2.4. Subsection R313.2.4 is added to read:
R313.2.4 One- and two-family dwellings location. Where a one- or two-family dwelling is located a distance between 100 feet (3048 mm) and 300 feet (91.44 m) from an approved fire apparatus road, an automatic fire sprinkler system must be installed.
Exception: Where approved by the fire code official.
(45) Amending Subsection R317.3.1. Subsection R317.3.1is amended to read:
R317.3.1 Fasteners for preservative-treated wood. Fasteners for non-borate pressure preservative and fire-retardant- treated wood must be of hot-dipped zinc-coated galvanized steel, stainless steel, silicon bronze or copper. The coating weights for zinc-coated fasteners must be in accordance with ASTM A 153.
Exceptions:
1. One-half-inch (12.7 mm) diameter or greater steel bolts.
2. Fasteners other than nails and timber rivets are permitted to be of mechanically deposited zinc-coated steel with coating weights in accordance with ASTM B695, Class 55 minimum.
(46) Adding Subsection R317.5. Subsection R317.5 is added to read:
R317.5 Glued laminated, engineered or composite structural members. The portions of these structural members that form the structural supports of a building or other structure, which are structural glued laminated members made up of dimensional lumber, engineered wood products, or structural composite lumber, must be pressure treated in accordance with AWPA U 1 (UC1 through UC4B) or by light oil solvent preservative (LOSP) treatment standard as approved by the building official. Water based treatment processes are not allowed to be used on these products unless specified by a structural engineer for use with reduced load values.
(47) Adding Subsection R317.6. Subsection R317.6 is added to read:
R317.6 Under-floor clearance. Minimum clearance between the bottom of floor joists or bottom of floors without joists and the ground beneath is 24 inches (610 mm); the minimum clearance between the bottom of girders and the ground is 18 inches (457 mm).
Exception: Open slat wood decks must have ground clearance of at least 6 inches (152 mm) for any wood member. For accessibility, under-floor areas must be provided with a minimum 14-inch x 24-inch (356 mm x 610 mm) access opening.
For accessibility, under-floor areas must be provided with a minimum 18-inch (457 mm) by 24-inch (610 mm) access opening, effectively screened or covered. Pipes, ducts and other construction will not interfere with the accessibility to or within under-floor areas. See section M1305.1.4 for access requirements where mechanical equipment is located under floors.
(48) Amending Subsection R318.1.1. Subsection R318.1.1 is amended by adding a second paragraph to read:
All lumber less than 2 inches (51 mm) in nominal thickness must be identified per bundle by means of a label consisting of the above requirements. Labels measuring no less than 6 inches by 8 inches (152 mm by 203 mm) must be placed on the lower left corner of the strapped bundle.
(49) Adding Subsection R318.1.3. Subsection R318.1.3 is added to read:
R318.1.3 Structure protection. Where the plates, sills, and structural lumber of new wood frame buildings are supported directly on the ground by:
1. A concrete slab or foundation, the soil beneath the building must be either:
1.1 Chemically treated at the maximum label rate for control of Formosan subterranean termites by a licensed pest control operator, or
1.2 Basaltic Termite Barrier (BTB), stainless steel termite barrier mesh, or other termite barrier approved by the building official, installed according to the manufacturer’s installation instructions.
2. The perimeter of the structure must be protected by either:
2.1 A continuous chemical barrier applied at the maximum label rates by an operator licensed to control ground termites to the backfill in 12-inch (305 mm) lifts in a band extending at least 12 inches (305 mm) beyond the concrete; or
2.2 A continuous barrier of BTB at least 4 inches (102 mm) in thickness extending at least 6 inches (152 mm) beyond the concrete slab.
3. A poured-in-place concrete foundation wall, the foundation wall must be protected from the adjacent soil by either:
3.1 A continuous chemical barrier applied at the maximum label rates by an operator licensed to control ground termites to the backfill in 12-inch (305 mm) lifts in a band extending at least 12 inches (305 mm) beyond the concrete;
3.2 A continuous barrier of BTB at least 6 inches (152 mm) in thickness extending the full height of the retained soil; or
3.3 An approved stainless steel termite barrier mesh must protect all cracks and joints.
4. A CMU foundation wall, the foundation wall must be protected from the adjacent soil by either:
4.1 A continuous barrier of BTB at least 6 inches (152 mm) in thickness extending the full height of the retained soil;
4.2. An approved stainless steel termite barrier mesh between the top of the CMU and all wood framing; or
4.3 A continuous cap or reinforced concrete at least 4 inches (102 mm) in thickness between the top of the CMU and all wood framing.
Exception:
When a CMU foundation wall forms a retaining wall which is part of a wood frame structure, the CMU must be protected from the soil by a full barrier of BTB or a stainless steel termite barrier.
(50) Amending Subsection R318.2. Subsection R318.2 is amended to read:
R318.2 Chemical termiticide treatment. Chemical termiticide treatment shall include soil treatment, field applied wood treatment, or both. The concentration, rate of application and method of treatment of the chemical termiticide must be in strict accordance with the termiticide label. Chemical treatment will be applied at the maximum label rate for control of Formosan subterranean termites by a licensed pest control operator. There must be a continuous chemical barrier applied at the maximum label rates, by an operator licensed to control ground termites, to the finished grade in a band extending at least 12 inches (305 mm) beyond the concrete.
(51) Amending Subsection R318.3. Subsection R318.3 is amended to read:
R318.3 Barriers. Approved physical barriers, such as metal or plastic sheeting or collars specifically designed for termite prevention, Basaltic Termite Barrier (BTB), stainless steel termite barrier mesh, or other termite barrier approved by the building official, installed according to the manufacturer’s installation instructions, must be installed in manner to prevent termites from entering the structure. Shields placed on top of an exterior foundation wall are permitted to be used only if in combination with another method of protection.
(52) Amending Subsection R320.1. Subsection R320.1 is amended to read:
R320.1 Scope. Where there are four or more dwelling units or sleeping units in a single structure, the following provisions for Group R-3 apply:
1. For construction of buildings or facilities of the state and city governments, compliance with HRS 103-50, administered by the Disability and Communication Access Board, State of Hawaii.
2. Americans with Disabilities Act, administered and enforced by the U.S. Department of Justice.
3. Fair Housing Act, administered and enforced by the U.S. Department of Housing and Urban Development.
4. Other pertinent laws relating to person with disabilities will be administered and enforced by the agencies responsible for their enforcement.
Prior to the issuance of a building permit, the owner (or the owner’s representative, professional architect, or engineer), shall submit a statement that all requirements relating to accessibility for persons with disabilities will be complied with.
(53) Amending Subsection R322.2. Subsection R322.2 is amended to read:
R322.2 Flood hazard areas. All areas that have been determined to be located within areas of special flood hazard must be in accordance with ROH Chapter 21A.
(54) Amending Subsection R323.1. Subsection R323.1 is amended to read:
R323.1 General. This section applies to the construction of storm shelters when constructed as separate detached buildings or when constructed as safe rooms within buildings for the purpose of providing safe refuge from storms that produce high winds, such as tornados and hurricanes. In addition to other applicable requirements in this code, storm shelters must be constructed in accordance with ICC/NSSA-500 or the Hawaii residential safe room ordinance, ROH Chapter 16, Article 13.
(55) Adding Section R324. Section R324 is added to read:
R324 Light-transmission plastic roof structures. Awnings, patio covers, carports and similar structures. Roofed structures constructed of light-transmitting plastics must comply with this section.
R324.1 Specifications. Light-transmitting plastics, including thermoplastic, thermosetting or reinforced thermosetting plastic material must have a self-ignition temperature of 650°F (343°C) or greater where tested in accordance with ASTM D 1929, a smoke-development index not greater than 450 where tested in the manner intended for use in accordance with ASTM E 84 or UL 723, or a maximum average smoke density rating not greater than 75 where tested in the thickness intended to be used in accordance with ASTM D 2843 and must conform to one of the following combustibility classifications.
Class CC1: Plastic materials that have a burning extent of 1 inch (25 mm) or less where tested at a nominal thickness of 0.060 inches (1.5 mm), or in the thickness intended for use, in accordance with ASTM D 635.
Class CC2: Plastic materials that have a burning rate of 2½ inches per minute (1.06 m/s) or less where tested at a nominal thickness of 0.060 (1.5 mm), or in the thickness intended for use, in accordance with ASTM D 635.
R324.2 Structural requirements. Light-transmitting plastic materials in their assembly must be of adequate strength and durability to withstand the loads indicated in R301.6. Technical data must be submitted to establish stresses, maximum unsupported spans and such other information for the various thicknesses and forms used as deemed necessary by the building official.
R324.3 Fastening. Fastening must be adequate to withstand the loads in R301. Proper allowance must be made for expansion and contraction of light-transmitting plastic materials in accordance with accepted data on the coefficient of expansion of the material and other material in conjunction with which it is employed.
R324.4 Size limitation.
1. Swimming pool structures must not exceed 5,000 square feet (465 m2) in area and must have a minimum fire separation distance of 10 feet (3048 mm).
2. Roof coverings over carports, terraces and patios must have a minimum fire separation distance of 6 feet (1829 mm).
(56) Adding Subsection R401.5. Subsection R401.5 is added to read:
R401.5 Post or Pier Foundations. Raised floor systems supported by post or pier foundations shall be designed in accordance with accepted engineering practice and the International Building Code, as amended.
(57) Adding Subsection R401.6. Subsection R401.6 is added to read:
R401.6 Concrete Strap-Type Anchors. Concrete strap-type anchors made out of cold-formed steel may not be used along the perimeter edges of a slab on grade if the steel does not have at least 1-1/2 inches of side cover or other adequate protection.
(58) Adding Subsection R401.7. Subsection R401.7 is added to read:
R401.7 Anchor Bolts at the Perimeter Edge of a Slab on Grade. Anchor bolts must be hot dipped galvanized in accordance with ASTM F2329 and have a minimum concrete side cover of 1-1/2 inches unless provisions have been made to protect the anchor bolts from corrosion.
(59) Adding Subsection R401.8. Subsection R401.8 is added to read:
R401.8 Protection of Steel Sill Track. Residential load bearing framing members that are in direct contact with moisture from the slab on grade or from the outdoor climate must be adequately shielded with additional corrosion protection or manufactured from a material not susceptible to corrosion. The exterior face of the sill track must also be protected.
(60) Adding Subsection R401.9. Subsection R401.9 is added to read:
R401.9 ACI 318, Table 4.3.1. Amend ACI 318 Table 4.3.1 as follows: Change the Maximum w/cm ratio for Exposure Class C1 to 0.50.
(61) Adding Subsection R408.8. Subsection R408.8 is added to read:
R408.8 Under-Floor Clearance. Minimum clearance between the bottom of floor joists or bottom of floors without joists and the ground beneath is 24 inches (610 mm); the minimum clearance between the bottom of girders and the ground is 18 inches (457 mm).
Exception: Open slat wood decks must have ground clearance of at least 6 inches (152 mm) for any wood member.
(62) Amending Subsection R602.3. Subsection R602.3 is amended to read:
R602.3 Design and construction. Exterior walls of wood-frame construction must be designed in accordance with R301.2.1. Construction must be in accordance to the provisions of this chapter or in accordance with AF&PA’s NDS. Wall sheathing must be fastened directly to framing members and, when placed on the exterior side of an exterior wall, must be capable of resisting wind pressures. Wood structural panel sheathing used for exterior walls must conform to DOC PS 1, DOC PS 2, or, when manufactured in Canada, CSA 0437 or CSA 0325. All panels must be identified for grade, bond classification, and performance category by a grade mark or certificate of inspection issued by an approved agency and must conform to the requirements of Table R602.3(3). The requirements for a greater level of wind resistance must be provided whenever there are conflicts between the requirements of this chapter and the requirements of:
1. The AF&PA Wood Frame Construction Manual (WFCM);
2. The ICC Standard for Residential Construction in High-Wind Regions (ICC 600);
3. ASCE Minimum Design Loads for Buildings and Other Structures (ASCE 7);
4. AISI Standard for Cold-Formed Steel Framing-Prescriptive Method For One- and Two-Family Dwellings (AISI S230); or
5. International Building Code, as amended.
(63) Amending Table R602.3(3). Table R602.3(3) is amended as follows:
TABLE R602.3(3) | |||||||||
MAXIMUM EFFECTIVE WIND SPEED (mph) (3-SECOND GUST) PERMITTED FOR WOOD STRUCTURAL PANEL WALL SHEATHING USED TO RESIST WIND PRESSURES a,b,c | |||||||||
MINIMUM NAIL | MINIMUM WOOD STRUCTURAL PANEL SPAN RATING | MINIMUM NOMINAL PANEL THICKNESS (inches) | MAXIMUM WALL STUD SPACING (inches) | PANEL NAIL SPACING | V
eff-asd MAXIMUM EFFECTIVE NOMINAL DESIGN WIND SPEED (MPH) | ||||
Size | Penetration (inches)
|
Edges (inches o.c.) | Field (inches o.c.) | Wind exposure category | |||||
B | C | D | |||||||
TABLE R602.3(3) | |||||||||
MAXIMUM EFFECTIVE WIND SPEED (mph) (3-SECOND GUST) PERMITTED FOR WOOD STRUCTURAL PANEL WALL SHEATHING USED TO RESIST WIND PRESSURES a,b,c | |||||||||
MINIMUM NAIL | MINIMUM WOOD STRUCTURAL PANEL SPAN RATING | MINIMUM NOMINAL PANEL THICKNESS (inches) | MAXIMUM WALL STUD SPACING (inches) | PANEL NAIL SPACING | V
eff-asd MAXIMUM EFFECTIVE NOMINAL DESIGN WIND SPEED (MPH) | ||||
Size | Penetration (inches)
|
Edges (inches o.c.) | Field (inches o.c.) | Wind exposure category | |||||
B | C | D | |||||||
6d common (2.0" x 0.133") | 1.5 | 24/0 | 3/8 | 16 | 6 | 12 | 110 | 90 | 85 |
24/16 | 7/16 | 16 | 6 | 12 | 110 | 100 | 90 | ||
6 | 150 | 125 | 110 | ||||||
8d common (2.5" x 0.131") | 1.75 | 24/16 | 7/16 | 16 | 6 | 12 | 130 | 110 | 105 |
6 | 150 | 125 | 110 | ||||||
24 | 6 | 12 | 110 | 90 | 85 | ||||
6 | 110 | 90 | 85 | ||||||
For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. Panel strength axis must be parallel or perpendicular to supports. Three-ply plywood sheathing with studs spaced more than 16 inches on center must be applied with panel strength axis perpendicular to supports.
b. The table is based on wind pressures acting toward and away from building surfaces in accordance with Chapter 27 of ASCE 7. Lateral requirements must be in accordance with Section 2305 or 2308.
c. Wood structural panels with span ratings of wall-16 or wall-24 are permitted as an alternative to panels with a 24/0 span rating. Plywood siding rated 16 o.c. must be used with studs spaced a maximum of 16 inches o.c.
(64) Amending Subsection R602.10.9. Subsection R602.10.9 is amended to read:
R602.10.9 Braced wall panel support. Braced wall panel support shall be provided as follows:
1. Cantilevered floor joists complying with Section R502.3.3 are permitted to support braced wall panels.
2. Raised floor system post or pier foundations supporting braced wall panels must be designed in accordance with accepted engineering practice and the International Building Code as amended.
3. Masonry stem walls with a length of 48 inches (1,219 mm) or less supporting braced wall panels must be reinforced in accordance with Figure R602.10.9. Masonry stem walls with a length greater than 48 inches (1,219 mm) supporting braced wall panels must be constructed in accordance with Section R403.1 Methods ABW and PFH shall not be permitted to attach to masonry stem walls.
4. Concrete stem walls with a length of 48 inches (1,219 mm) or less, greater than 12 inches (305 mm) tall, and less than 6 inches (152 mm) thick must have reinforcement sized and located in accordance with Figure R602.10.9.
(65) Amending Subsection R602.10.9.1. Subsection R602.10.9.1 is amended to read:
R602.10.9.1 Braced wall panel support for Seismic Design Category D
2. In one-story buildings located in Seismic Design Category D
2, braced wall panels must be supported on continuous foundations at intervals not exceeding 50 feet (15,240 mm). In two-story buildings located in Seismic Design Category D
2, all braced wall panels must be supported on continuous foundations.
Exception: Two-story buildings are permitted to have interior braced wall panels supported on continuous foundations at intervals not exceeding 50 feet (15,240 mm) provided that:
1. The height of cripple walls does not exceed 4 feet (1219 mm).
2. First-floor braced wall panels are supported on doubled floor joists, continuous blocking, or floor beams.
3. The distance between bracing lines does not exceed twice the building width measured parallel to the braced wall line.
(66) Adding Section R614. Section R614 is added to read:
SECTION R614 - WALLS WITHOUT STUDS
R614.1 General. For Type V-B buildings, single-wall construction without studs may be used in accordance with this section for repairs to existing buildings of single-wall construction.
One-story and the uppermost story of wood frame Type V-B buildings may be of single-wall construction with board thickness specified in this section, without studs, when requirements of this section are met. Floor to ceiling height must not exceed 8 feet (2,438 mm).
Any provision of this code to the contrary notwithstanding, studding of not less than 2-inches by 3-inches (51 mm by 76.2 mm) may be used on one- story buildings of double-wall construction.
When wood-frame dwellings are supported by posts, 2-inch by 4-inch (51 mm by 102 mm) foundation bracing must be provided.
For one-story conventional residential structures, the local practice of using foundation blocks with termite shields is acceptable in all areas except in flood hazard areas and for developments adjacent to drainage facilities as specified in ROH Section 16-11.1.
R614.2 Board for Single-Wall Construction
R614.2.1 One and One-Eighth Inch Boards. Single-wall construction with boards of 1-1/8 inch (28.6 mm) net thickness are not required to have girts.
R614.2.2 One-Inch Boards. Where single-wall construction is with boards of one-inch thickness (25.4 mm), no girt is required, provided approved stiffeners for any section of such wall are spaced not more than 10 feet (3048 mm) along the wall.
R614.2.3 Three-Fourths-Inch Boards. Single-wall construction with boards of ¾-inch (19.1 mm) net thickness must have girts and cross partitions at least every 30 feet (9144 mm).
R614.2.4 Approved Stiffeners. Approved stiffeners must be studs at least 2-inches by 4-inches (51 mm by 102 mm), full height window or door jambs, posts, walls or partitions at right angles to the section of wall under construction.
R614.2.5 Girts. Girts for single-wall construction must be not less than 2-inches by 6-inches (51 mm by 152 mm) belt course or other approved strengthening about mid height between the floor and ceiling on all exterior walls.
R614.2.6 Complete Load Path. Blocking, bridging, straps, approved framing anchors or mechanical fasteners must be designed and installed to provide continuous ties from the roof to the foundation system. Sheet metal clamps, ties or clips, must be formed of ASTM A153 G90 galvanized steel or other approved corrosion-resistant material of not less than 0.040-inch (1.01 mm) nominal thickness. Uplift resistance must be in accordance with Table R802.11.
(67) Amending Subsection R903.4.1. Subsection R903.4.1 is amended to read:
R903.4.1 Secondary (emergency overflow) drains or scuppers. Where roof drains are required, secondary emergency overflow drains or scuppers must be provided where the roof perimeter construction extends above the roof in such a manner that water will be entrapped if the primary drains allow buildup for any reason. Overflow drains having the same size as the roof drains must be installed with the inlet flow line located 2 inches (51 mm) above the low point of the roof, or overflow scuppers having three times the size of the roof drains and having a minimum opening height of 4 inches (102 mm) shall be installed in the adjacent parapet walls with the inlet flow located 2 inches (51 mm) above the low point of the roof served.
(68) Amending Chapter 11. Chapter 11 is amended to read:
CHAPTER 11 - ENERGY EFFICIENCY
Chapter 11 of the IRC is deleted in its entirety and replaced by the provisions in ROH Chapter 16B.
(69) Amending Chapter 12. Chapter 12 is amended by adding Sections M1201 and M1202 of the International Residential Code for One- and Two-Family Dwellings, 2012 Edition, and amending Subsection M1201.1 to read:
M1201.1 Scope. The provisions of Chapters 12 through 24 regulate the mechanical installations that are permanently installed and used to control environmental conditions within buildings, mechanical systems, system components, equipment, and appliances specifically addressed in this code. Where an application is made for construction as described in these chapters, the owner, or the licensed design professional in responsible charge acting as the owner’s agent, shall employ one or more special inspectors to provide inspections during construction on the work in these chapters. These inspections are in addition to the inspections specified in Section R109.
(70) Amending Chapter 13. Chapter 13 is amended by adding Sections M1301 to M1308 of the International Residential Code for One- and Two-Family Dwellings, 2012 Edition, and amending Subsection M1306.3 to read:
M1306.3 Clearance to walls without studs. For walls constructed in accordance with Section R614, the minimum horizontal clearance from the burner head(s) of a top (or surface) cooking unit to combustible walls is 12 inches (305 mm), provided there is protection equivalent to 1/2-inch (12.7 mm) gypsum wallboard covered with laminated plastic on wood backing.
(71) Amending Chapter 15. Chapter 15 is amended by adding Sections M1501 to M1507 of the International Residential Code for One- and Two-Family Dwellings, 2012 Edition, and amending Subsection M1502.6 to read:
M1502.6 Makeup Air. When a closet is designed for the installation of a clothes dryer, a minimum opening of 100 square inches (645 m2) for makeup air must be provided in the door or by other approved means.
(72) Amending Subsection M2301.5. Subsection M2301.5 is amended to read:
M2301.5 Backflow protection. Connections from the potable water supply to solar systems shall comply with the plumbing code.
(73) Amending Chapter 44. Chapter 44 is amended by amending AISI reference standard AISI S230-15, and ICC reference standard ICC 600-14 to read:
Standard reference number | Title | Referenced In code section number |
AISI S230-15 | Standard for Cold-formed Steel Framing-Prescriptive Method for One- and Two-Family Dwellings | R301.1.1, R301.2.1.1, R301.2.2.3.1 R301.2.2.3.5, R603.6, R603.9.4.1, R603.9.4.2, R611.9.2, R611.9.3, R611.10 |
ICC 600-14 | Standard for Residential Construction in High-wind Regions | R301.2.1.1 |
(1990 Code, Ch. 16, Art. 1, § 16-1.2) (Added by Ord. 12-34, Am. Ord. 20-7)