The CRC covers all structural requirements for "conventional construction" and non-structural aspects of dwelling construction. Non-conventional engineered design must use the CBC and other required structural referenced standards. General Notes and codes references must be revised to CRC code sections.
Residential Fire Sprinklers are now required in all new residential construction. (Sec. R313.2) Residential sprinklers are not required in detached garages (6’ wall to wall separation), or carports which do not have occupied space above. Additions of 1000 sf or over ½ the existing structure trigger sprinklers (Cal-Fire).The sprinkler plans with the water supply or storage amounts must be submitted as a separate permit prior to issuance of the structure permit.
Garage wall- ½" drywall is required between dwelling wall and a garage, Garage ceiling to be 5/8"X if habitable or sleeping is above. (Sec. R302.5 & .6)
Exterior wall fire separation distance: In sprinklered dwellings; 0’-3’ requires 1-hour walls with no openings, >3’ no fire protection of walls or openings. Non-sprinklered dwellings; 0’-3’ requires 1-hour walls with no openings, 3’-5’ requires 1-hour walls & 25% openings, >5’ no fire protection of walls or openings. (Sec. R302.1)
Natural ventilation (4% of floor area) is not required if mechanical ventilation system is installed (0.35 air change per hour in the room) and emergency egress in not required (Sec R303.1 - Exception #1)
Natural lightis not required when mechanical ventilation is installed per the above and artificial illumination is provided capable of producing 6footcandles 30" above the floor. (Sec R303.1 – Exception #2)
Bathtub/shower compartments: shall have a nonabsorbent surface extending 72" above the floor. (Sec R307.2)
Landings serving the one required egress door (3’x6’-8") shall not be more than 1-1/2 inches lower than the top of the threshold. (Sec 311.3.2) There are many exceptions, see our