General Requirements

Related Diagrams/Tables

Beam Connections (pdf/1.5mb)

Carport/Garage Conversion Plan

Elevations (pdf/1.3mb)

Exterior Wall Footings (pdf/1.6mb)

Foundation Plan (pdf/1.5mb)

Framing Plan (pdf/1.3mb)

Framing, Typical (pdf/1.7mb)

Gable End Bracing (pdf/858kb)

Nailing Schedule (pdf/66kb)

Patios (pdf/2.4mb)

Retaining Walls (pdf/61kb)

Roof Beams (pdf/71kb)

Roof Joist Table (pdf/89kb)

Site Plan, Typical (pdf/546kb)

Trussbearing on Masonry Wall

Walls Plans, corner lots (pdf/1.3mb)

Window Flashing (pdf/1.6mb)

COS Standard Detail Drawings

Location on Property
All dwellings, addition to dwellings and detached accessory buildings must conform to the zoning ordinance requirements of the city.

Private Garages
In existing houses without a fire sprinkler system, the materials of construction on the garage side of a frame wall between the dwelling and garage must be of one-hour fire resistive construction consisting of 5/8" fire resistive sheet rock or gypsum lath and plaster. The ceilings must be protected in the same manner. Doors must be 1 3/8" minimum thickness, solid core, with self-closing device. Windows between the garage and house shall be unopenable and of wire glass set in steel frames. No opening shall lead directly into a room used for sleeping. These requirements also apply to carport conversions to garage.  In fire sprinkler houses, the one-hour fire resistive construction and solid core door are exempt. However, a self closing, and tight fitting door is required.

Roof Construction
The allowable span of roof rafters is measured from the wall plate to the roof ridge, unless the rafters are attached to intermediate bearing partitions. Floor joist spans are measured between bearing members. Roof trusses may be used, provided the truss designs are sealed and signed by an engineer licensed in Arizona. Seal shall be dated within latest city adopted building code. All truss designs shall be identified on the framing plan.

Room Sizes
At least one room in a dwelling shall be not less than 120 square feet. Other habitable rooms except kitchens and bathrooms closets and halls shall contain not less than 70 square feet.

Stairways must be a minimum of 36" in width with at least one handrail. The rise of stairs shall not be more than 8" and the tread width shall not be less than 9". The vertical headroom clearance shall not be less than 6'8". The handgrip portion of handrails shall be a minimum 1 1/4" to maximum of 2" in cross-sectional dimension and must be located between 34" and 38" above the nosing of treads and landings. Openings in railings shall be of such design that a sphere 4" in diameter cannot pass through.

Wall Framing-Wood
Exterior walls of one story wood frame building shall be constructed with stud framing not less than 2 x 4, spaced not more than 24" on centers, supporting roof and ceiling only and maximum of 10' in height. "Utility" grade studs shall be a minimum 16" o.c. and support only roof and ceiling load to a maximum 8' height. Non-loading bearing "utility" grade studs may be 10' in height.

Lumber Identification
All framing members and plywood or other sheathing types shall be identified by an approved grade mark.

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