California Code, Health and Safety Code - HSC § 18871.11

(a) A camping cabin shall be designed to resist the following live loads: (1) floor live loads not less than 40 pounds per square foot of floor area; (2) horizontal live loads not less than 15 pounds per square foot of vertical wall and roof area; and (3) roof live loads not less than 20 pounds per square foot of horizontal roof area. In areas where snow loads are greater than 20 pounds per square foot, the roof shall be designed and constructed to resist these additional loads.

(b) Each sleeping room in a camping cabin shall have a second exit to the outside of the camping cabin, except that a window exit may be permitted as an alternative if the opening is not less than 20 inches wide and 24 inches high and the bottom of the window is located not more than 44 inches above the floor.

(c) Each sleeping room in a camping cabin shall be provided with an approved smoke detector. If the camping cabin contains an electrical system, the smoke detector shall be energized from that electrical system with a battery backup. If there is no electrical system in the camping cabin, a battery-operated smoke detector is permitted.

(d) All wall and ceiling surfaces in a camping cabin shall have a flame spread rating of not more than 200.

(e) Fuel-burning heating or cooking appliances shall not be operated within a camping cabin.

(f) Access for disabled persons to camping cabins shall be provided in conformance with applicable state and federal laws.