(A) Sections not adopted. The following sections of the 2012 International Residential Code are not adopted by the district:
(1) R303.4 Mechanical Ventilation;
(2) N1102.4.1.2 (R402.4.1.2) Testing;
(3) R309.5 Fire Sprinklers; and
(4) R501.3 Fire Protection of Floors.
(Prior Code, § 3-86)
(B) Sections adopted. The following sections of the 2012 International Residential Code are hereby adopted by the district:
(1) R602.12 Simplified Wall Bracing;
(2) R802.11.1 Uplift Resistance;
(3) N1101.3 (R101.4.3) Additions, Alterations, Renovations and Repairs;
(4) Table N1102.1.1 (R402.1.1) Insulation and Fenestration Requirements by Component; and
Climate Zone | Fenestration U-Factor | Skylight U-Factor | Glazed Fenestration SHGC | Ceiling R-Value | Wood Frame Wall R-Value | Mall Wall R-Value | Floor R-Value | Basement Wall R-Value | Slab R-Value | Crawl Space Wall Value |
6 | .32 | .55 | NR | 49 | 20 or 13+5 | 15-19 | 30 | 10/13 | 10, 4 feet | 10-13 |
(5) N1102.2.8 (R4102.2.8) Basement Walls.
(Prior Code, § 3-87)
(C) Section 3 of Sub-Section 1025 - Emergency Escape and Rescue amendments. In the 2012 International Building Code, Section 3 of Sub-Section 1025 - Emergency Escape and Rescue shall be amended to read as follows:
1025.3 Maximum height from floor. Emergency escape and rescue openings shall have the bottom of the clear opening not greater than 48 inches (1,220 mm) measured from the floor.
(Prior Code, § 3-88)
(D) Section 1.4 of Sub-Section 406 - Separation. In the 2012 International Building Code, Section 1.4 of Sub-Section 406 - Separation shall be read as follows:
406.1.4 Separation. Separations shall comply with the following:
1. The private garage shall be separated from the dwelling unit and its attic area by means of a minimum of 5/8-inch (15.9 mm) gypsum board applied to the garage side. Garages beneath habitable rooms shall be separated from all habitable rooms above by not less than 5/8-inch Type X gypsum board of equivalent. Door openings between a private garage and the dwelling unit shall be equipped with either solid wood doors, or solid or honeycomb core steel doors not less than 1-3/8 inches (35.9 mm) thick, or doors in compliance with Section 715.3.3. All doors must be self-closing. Openings from a private garage directly into a room used for sleeping purposes shall not be permitted.
2. Ducts in a private garage and ducts penetrating the walls or ceilings separating the dwelling unit from the garage shall be constructed of a minimum of 0.019-inch (0.48 mm) sheet steel and shall have no openings into the garage.
3. A separation is not required between a Group R-3 and U carport; provided the carport is entirely open on two or more sides and there are not enclosed areas above.
(Prior Code, § 3-89)
(E) General construction requirements.
(1) Section R302.1 Exterior Walls - Exception 2 is amended to read: Detached garages accessory to a dwelling are not required to provide wall protection when the building area does not exceed 1,000 square feet and the exterior wall is located not less than three feet from the property line. Roof eave projections shall extend not less than 12 inches to a property line.
(2) Section R310.1 Emergency Escape and Rescue Required - is amended to by adding the following sentence to the section: In basements, the sill height of an emergency escape and rescue opening may be measured from an elevated landing, provided the landing is not less than 36 inches in width and not less than 20 inches out from the exterior wall, and not more than 24 inches in height. The elevated landing and its supporting structure shall be permanently affixed to the wall and floor below the openable emergency escape and rescue window.
(3) Section R404.1 Concrete and Masonry Foundation Walls - paragraph 2 is amended to read: Floor joists and blocking shall be connected to the sill plate at the top of the wall with three 8d nails toe nailed to the sill or girder.
(4) Paragraph 3 is amended to read: Sill plates shall be bolted to the foundation or foundation wall not less than one-half inch nominal diameter steel bolts embedded at least seven inches into the concrete or masonry and spaced not more than four feet apart. There shall be a minimum of two bolts per piece with one bolt located within 12 inches of each end of each piece. A properly sized nut and washer shall be tightened on each bolt to the plate.
(5) Paragraph 5 is deleted.
(6) Section 903.4.2 Alarms - is amended to read: Approved audible devices shall be connected to every automatic sprinkler system. Such sprinkler water flow alarm devices shall be active by water flow equivalent to the flow of a single sprinkler of the smallest orifice size installed in the system. Alarm devices shall be provided on the exterior of the building in an approved location. Approved audible visual alarms to alert the occupants of the building shall be installed throughout the building in accordance with NFPA 72 and as required by the authority having jurisdiction. Where a fire alarm system is installed, activation of the automatic sprinkler system shall activate the buildings fire alarm system.
(7) Section R907.3 Re-covering Versus Replacement - Paragraph 4 is deleted.
(8) Table R301.2 (1) Climate and Geographic Design Criteria - is amended by inserting the following climate and geographical design criteria. The following table shall be applicable to the general design requirements of the 2012 International Residential Code and 2012 International Building Code.
Ground Snow Load | Wind Speed (mph) | Seismic Design Capacity | Weathering (Concrete Masonry) | Frost Line Depth | Termite Damage |
35 | 90 | A | Severe | 42 inches | Slight |
Decay Damage | Winter Design Temperature | Ice Shield Required | Flood Hazard NFIP Adopted | Air Freezing Index | Mean Annual Temperature |
Slight | -7ºF | Yes | 1979 | 2000 | 48.3ºF |
(9) Table R403.1 Minimum Width of Concrete or Masonry Footings - all tables shall be replaced with the following.
Spread Footings - Single Story Light Frame Construction Only
| |||
Number of Floors Supported by Foundation | Width of Footings (Inches) | Thickness of Footings (Inches) | Minimum Depth of Foundation Below Natural Surface of Ground or Finish Grade (Inches) |
1 | 16 | 8 | 42 |
2 | 16 | 8 | 42 |
3 | 20 | 12 | 42 |
Notes: 1. Foundations may support a roof in addition to the stipulated number of floors. 2. Foundations supporting only roofs shall be as required for supporting one floor. 3. The ground under the floor is permitted to be excavated to the footings top elevation. 4. All footings shall have at least two #4 reinforcement bars parallel with footings. | |||
Trench Footings - Single Story Light Frame Construction
| ||||
Number of Floors Supported by Foundation | Minimum Width of Footings (Inches) | Minimum Depth of Foundation Below Natural Surface of Ground or Finish Grade (Inches) | Minimum Vertical Reinforcement | Minimum Horizontal Reinforcement |
1 | 8 | 2 | #4 at 48" o.c. | #4 top and bottom |
Notes: 1. Foundations may support a roof in addition to the stipulated number of floors. 2. Soil bearing pressure shall be a minimum of 2,000 psi. 3. Structural spans shall not exceed 16 feet. | ||||
(10) Table 1805.4.2 Floors supporting walls of Light Frame Construction - is amended by adding the following table.
Monolithic Slab Footings - Group U (Utility) Type Structures Only
| ||||
Minimum Building Area | Minimum Width of Footings (Inches) | Minimum Depth of Footing (Inches) | Minimum Horizontal Reinforcement | Minimum Floor Thickness (Inches) |
1,000 square feet | 12 | 12 | #4 top and bottom | 3.5 |
Notes: 1. Footings or foundation shall extend a minimum six inches above the finished grade. 2. Footings shall support not more than 16 inches of masonry block or concrete. 3. Monolithic slab footings are not permitted when any portion of the footing is to be located less than six feet to a Group R - residential occupancy use. | ||||
(Prior Code, § 3-91) (Ord. 2014-03, passed 11-17-2014)