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Title: Section 1008  •  Size: 3896

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SECTION 1008 - HORIZONTAL EXIT

1008.1 Used as a Required Exit. A horizontal exit may be considered as a required exit when conforming to the provisions of this chapter. A horizontal exit shall not serve as the only exit from a portion of a building, and when two or more exits are required, not more than one half of the total number of exits or total exit width may be horizontal exits.

1008.2 Openings. Openings in a horizontal exit shall be protected by a fire assembly having a fire-protection rating of not less than one and one-half hours.

Such fire assemblies shall be self-closing or automatic closing upon the activation of a smoke detector installed in accordance with Section 713. All hold-open devices shall be listed for the purpose and shall close or release the fire assembly to the closed position in the event of a power failure.

1008.3 Discharge Areas. A horizontal exit shall lead into a floor area having capacity for an occupant load not less than the occupant load served by such exit. The capacity shall be determined by allowing 3 square feet (0.27 ) of net clear floor area for each occupant to be accommodated therein, not including areas of stairs, elevators and other shafts or courts. In Group I, Division 1.1 Occupancies, the capacity shall be determined by allowing 15 square feet (1.4 ) of net clear floor area per ambulatory occupant and 30 square feet (2.8 ) per nonambulatory occupant. The area into which a horizontal exit leads shall be provided with exits adequate to meet the requirements of this chapter but need not include the added capacity imposed by persons entering it through horizontal exits.

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