§ 9-18. Amendments to the 2012 International Residential Code.

The International Residential Code, 2012 Edition is hereby amended in the following respects:

Chapter 1. Administration is hereby amended by the deletion of Sections R101 through R114.

For the administration of this code, see the 2012 International Building Code and related amendments.

Section R201.4 is hereby amended by adding to the end of this subsection:

. . . Mirriam-Webster's Unabridged Dictionary of the English Language shall be considered as providing ordinarily accepted meanings.

Table R301.2(1) is amended to read as follows:

GROUND SNOW LOAD	WIND DESIGN		SEISMIC DESIGN CATEGORY f	SUBJECT TO DAMAGE FROM			WINTER DESIGN TEMP e	ICE BARRIER UNDERLAYMENT REQUIRED h	FLOOD HAZARDS g	AIR FREEZING INDEX i	MEAN ANNUAL TEMP i
	SPEED d (mph)	Topographic effects k		Weathering a	Frost line depth b	Termite c
N/A	90 mph	None	B	Moderate	N/A	Moderate to Heavy	32° F	No	FEMA	N/A	72.3° F

 

Section R301.2.2.1 is hereby amended by adding the following paragraph:

Masonry and concrete structures shall be designed and constructed to meet the minimum requirements of Seismic Design Category C.

Table R301.5 minimum uniformly distributed live loads is hereby amended as follows:

Habitable Attics and Attics Served with fixed stairs	40 psf
Sleeping Rooms	40 psf

 

Section R302.5.1 is hereby amended by adding the following to the end of this subsection:

Doors providing opening protection shall be maintained self-closing and self-latching.

Table R302.6 dwelling/garage separation is hereby amended as follows:

SEPARATION	MATERIAL
FROM THE RESIDENCE AND ATTICS	MINIMUM5/8" TYPE X GYPSUM BOARD APPLIED TO THE GARAGE SIDE
GARAGES LOCATED LESS THAN 3 FEET FROM A DWELLING UNIT ON THE SAME LOT	MINIMUM5/8" TYPE X GYPSUM BOARD APPLIED TO THE INTERIOR SIDE OF EXTERIOR WALLS

 

Section R305.1 is hereby amended by revising the first sentence to read as follows:

Habitable rooms shall have a minimum ceiling height of 7 feet 6 inches (2,286 mm). Hallways, corridors, bathrooms, toilet rooms, laundry rooms, and basements shall have a minimum ceiling height of not less than 7 feet (2,134mm).

Section R305.1 Exceptions is hereby amended as follows:

1.

For rooms with sloped ceilings, at least 50 percent of the required floor area of the room must have a minimum ceiling height of at least 7 feet 6 inches (2,286 mm) and no portion of the required floor area may have a ceiling height of less than 5 feet (1,524 mm).

2.

Bathrooms shall have a minimum ceiling height of 7 feet. A shower or tub equipped with a showerhead shall have a minimum ceiling height of 7 feet.

Section R310.2 is hereby amended by adding the following to the first paragraph:

A window well shall not be located beneath an emergency escape and rescue opening. A protective grate shall be provided over all window wells. The grate shall comply with Section R310.4 and shall be designed for a minimum uniformly distributed live load of 40 pounds per square foot.

Section R311.1 is hereby amended by adding the following sentences:

The means of egress from dwelling units or sleeping rooms shall not lead through other sleeping rooms, toilet rooms or bathrooms.

Section R311.3 is hereby amended by revising the title and first sentence as follows:

R311.3 Floors and Landings at Doors. There shall be a landing or floor on each side of each door.

Section R311.3.2 is hereby amended by adding the following text:

A door shall not swing over a lower floor or landing.

Section R313.2 Automatic Fire Sprinklers per A.R.S. § 9-807 is hereby deleted in its entirety.

Section R314.3 is hereby amended by adding the following paragraph:

4.

Where the ceiling height of a room open to the hallway servicing bedrooms exceeds that of the hallway by 24 inches or more, smoke alarms shall be installed in the hallways and in the adjacent room. Where soffits or other ceiling projections that separate a habitable room open to a hallway providing access to sleeping rooms creates an obstruction of 24 inches or more at the ceiling plane, smoke alarms shall be installed in the hallway and in the adjacent habitable room.

Section R314.3.1 is hereby amended by adding new exception 3 to read as follows:

3.

When the value of the alterations or repairs requiring a permit is less than Three Thousand Dollars ($3,000) and the work is limited to areas other than the rooms or areas listed in Section 313.1, the installation of smoke alarms is not required.

Section R319.1 is hereby deleted it its entirety and replaced with the following:

R319.1 Address Numbers. Property owners shall obtain and display on the residence, the correct building number or numbers as assigned to such property(ies) by the community development group of the City of Glendale in accordance with established street assignment policy, prior to final inspection and /or issuance of a certificate of occupancy. The building numbers shall be of a durable material not less than two and one-half inches (2½") high with a stroke of not less than one-half inch (½") in width, permanently attached to the building and must be readily distinguished and readable from the nearest paved public/common roadway fronting that property.

Section 323 Storm Shelters is hereby deleted in its entirety.

Section R323 Security Provisions is hereby amended by adding the following:

Section R323 Security Provisions

R323.1 Scope. The provisions of this section shall apply to door openings into dwelling units and to door openings between attached garages and dwelling units.

R323.2 Entry Vision. All main or front entry doors to dwelling units shall be arranged so that the occupant has a view of the area immediately outside the door without opening the door. Such view may be provided by a door viewer having a field of view of not less than 180 degrees through windows or through a view port.

R323.3 Door Strike Plate Installation. In wood-frame construction, an open space between trimmers and wood door jambs shall be solid shimmed by a single piece extending not less than 12 inches above and below the strike plate.

Strike plates shall be attached to wood with not less than four No.8 by 3-inch screws, which shall have a minimum of ¾-inch penetration into the nearest stud. Strike plates when attached to metal shall be attached with not less than four No. 8 machine screws.

R323.4 Door Hinges. Not less than three 4½-inch steel butt hinges shall be symmetrically fastened to both the door and frame with not less than four No. 9 by ¾-inch wood screws or to metal with not less than four No. 8 machine screws. When hinges are exposed to the exterior, at least one of the three required hinges shall be equipped with non-removable hinge pins or a mechanical interlock to preclude removal of the door by removing the hinge pins.

In wood construction, an open space between trimmers and wood door jambs shall be solid shimmed extending not less than 6 inches above and below the hinge plate.

R323.5 Locking Hardware. Single swinging doors and the active leaf of doors in pairs shall be equipped with an exterior key-operated deadbolt.

Section R401.4 is hereby amended by adding the following sentence:

A soils test and geotechnical evaluation report shall be required for all new buildings governed by this code.

Section R403.1.1 the third sentence is hereby revised to read as follows:

Spread footings shall be at least 10 inches in thickness.

Section R403.1.2: The title and the first sentence are revised to read as follows:

Continuous Footings in Seismic Design Categories B, C, D ₀ , D ₁ and D ₂ . The exterior walls of buildings located in Seismic Design Categories B, C, D _0, D ₁ and D ₂ shall be supported by continuous footings.

Section R403.1.3 is hereby amended by adding Seismic Design Categories B and C to all seismic design category requirements listed in this section. In addition, this section is amended by deleting the Exception for one- and two-family dwellings.

Section R403.1.3.1 is hereby amended by adding the following:

No. 4 vertical reinforcing bars shall be installed at 48 inches maximum spacing. The vertical bars shall tie the foundation stem wall to the footing and a 90 degree bend shall be provided at the no. 4 bar located in the footing.

Section R403.1.3 is hereby amended by adding the following subsection:

Section R403.1.3.3 Foundation Ties. When an addition is constructed, the new foundation shall be tied to the existing foundation by installing two (2) No. 4 dowel bars, minimum 12 inches long. These shall be embedded a minimum of 6 inches into the existing footing.

Section R403.1.4 Minimum Depth is hereby amended by revising 12 inches to 18 inches.

Section R403.1.6 is hereby amended by revising the first sentence of the second paragraph to read:

The wood sole plates at all exterior walls shall be anchored to the foundation with anchor bolts spaced a maximum of 4 feet on center.

Section R403.4.1 Crushed Stone Footings is hereby deleted in its entirety.

Table R404.1.1(1), Plain Masonry Foundation Walls is hereby deleted in its entirety.

Table R404.1.1(2), Masonry Foundation Walls is hereby deleted in its entirety.

Table R404.1.1(3), Masonry Foundation Walls is hereby deleted in its entirety.

Table R404.1.1(4), Masonry Foundation Walls is hereby deleted in its entirety.

Section R502.9 is hereby amended by adding the following subsection:

R502.9.1 Framing Connections. Framing details for bearing walls and posts shall be such that all components are tied together with positive connections to transmit wind uplift forces from the roof to the foundation. Nails loaded in withdrawal by such forces shall not be considered as positive connections.

Approved metal framing anchors shall be provided at the top and bottom of every other stud of a wood-frame bearing wall, except where structural panel sheathing is nailed directly to the studs, top plate and bottom plate in accordance with Table R602.3(1).

Floor-to-floor connections shall have approved metal strap ties at a maximum of 48 inches on center, except where justified by an engineered analysis that bears the seal of an architect or engineer.

Each truss, joist and rafter shall be connected to the top plate of the supporting wall with an approved metal framing anchor. The framing anchor shall be of the type which connects to both members of the double top plate. Beams shall be anchored to supporting walls and posts with approved metal framing connectors.

Section R505.1.1 is hereby amended by replacing it entirely as follows:

R505.1.1 Engineered Design Required. For steel floor framing, the project drawings, details, calculations and specifications are required to bear the seal of a registered design professional responsible for the design.

Section R602.10 and R602.12 are hereby amended by adding the following:

For buildings that are two (2) or more stories in height, the empirical design provisions for wall bracing in this section shall not be used. An engineered design shall be provided to include both gravity and lateral load calculations. The project drawings and engineering calculations shall bear the seal of a registered design professional.

Section R603.1.1 is hereby amended by replacing it entirely as follows:

R603.1.1 Engineered Design Required. For steel wall framing, the project drawings, details, calculations and specifications are required to bear the seal of a registered design professional responsible for the design.

Section R606.1 Professional Registration Not Required is hereby amended to read as follows:

Masonry walls and columns designed in accordance with the requirements of figure R606.11(3) shall not require an engineered design by an architect or engineer. Such walls and columns shall support only a roof and shall be limited to 10 feet in height. Masonry construction not meeting these empirical requirements shall require drawings and engineering calculations bearing the seal of a registrant.

Section R606.11 is hereby deleted and replaced with the following:

Masonry walls shall be anchored to floor and roof systems in accordance with the details shown in figures R606.11(1) and R606.11(3). Footings may be considered as points of lateral support.

The anchor bolt size and spacing shall be as required to support all imposed loads, but shall not be less than ½ inch diameter anchor bolts spaced at 4 feet on center, embedded a minimum of 4 inches.

Section R611.1 General is hereby amended by revising the last sentence to read as follows:

Project drawings, typical details, and specifications are required to bear the seal of a registered design professional responsible for the design.

Section R613.1 General is hereby amended by revising the last sentence to read:

Project drawings, typical details, and specifications are required to bear the seal of a registered design professional responsible for the design.

Section R802.8 Lateral Support is hereby amended to read as follows:

Rafters and ceiling joists shall be provided with lateral support at points of bearing to prevent rotation. Where lateral support is provided by wood blocking, the blocking shall be minimum nominal 2-inch thickness.

Section R802.8.1 Bridging. The first sentence is revised to read as follows:

Rafters and ceiling joists shall be supported by nominal 2 x solid blocking, diagonal bridging (wood or metal) or a continuous 1-inch by 3-inch wood strip nailed across the rafters or ceiling joists at intervals not exceeding 8 feet.

Section R804.1.1 shall be amended by replacing it entirely as follows:

R804.1.1. Engineered Design Required. For steel wall framing, the project drawings, details, calculations and specifications are required to bear the seal of a registered design professional responsible for the design.

Section R806.1 is hereby amended by deleting the Exception.

CHAPTER 11 (RE) ENERGY EFFICIENCY is hereby deleted in its entirety. The requirements for energy efficiency shall be governed by the 2012 International Energy Conservation Code.

Section M1701.1 is hereby amended by revising the last sentence to read:

The requirements for combustion and dilution air for gas-fired appliances shall be in accordance with Chapter 24 or the Uniform Plumbing Code.

Chapters 20 through 33 : The requirements for plumbing and fuel gas systems shall be governed by either these chapters or the 2012 Uniform Plumbing Code.

Chapters 34 through 43 are hereby deleted. The requirements for electrical systems shall be governed by the 2011 National Electrical Code.

(Ord. No. 2821, § 1, 10-23-12)