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1. On the ceiling or wall outside of each separate sleeping area in the immediate vicinity of bedrooms. 2. In each room used for sleeping purposes. 3. In each story within a dwelling unit, including basements but not including crawl spaces and uninhabitable attics. 4. In enclosed common stairwells of apartment complexes and other multiple- dwelling complexes. 5. In a Group R-3.1 occupancy, in addition to the above, smoke alarms shall be provided throughout the habitable areas of the dwelling unit except kitchens. Power source. In new construction, required smoke detectors shall receive their primary power from the building wiring when such wiring is served from a commercial source and shall be equipped with a battery backup. The detector shall emit a signal when the batteries are low. Wiring shall be permanent and without a disconnecting switch other than those required for over current protection. Smoke detectors may be solely battery operated when installed in existing buildings; or in buildings without commercial power; or in buildings which undergo alterations, repairs or additions regulated by this Section. Additions, alterations or repairs to Group R Occupancies. When the valuation of an addition, alteration or repair to a Group R Occupancy exceeds $1,000 and a permit is required, or when one or more sleeping rooms are added or created in existing Group R Occupancies, smoke detectors shall be installed in accordance with this section. EXCEPTION: Repairs to the exterior surfaces of a Group R Occupancy are exempt from the requirements of this section. 20.08.066 -This Section is Deleted. 20.08.068 -This Section is Deleted. 20.08.070 -This Section is Deleted. 20.08.072 -This Section is Deleted. 20.08.074 -This Section is Deleted. 20.08.075 -This Section is Deleted. 20.08.080 -This Section is Deleted. 20.08.081 Section 1614 added -Modification to ASCE 7. 54