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The height of the lowest horizontal surface of the smoke layer interface shall be maintained not less than 6 feet (1829 mm) above a walking surface that forms a portion of a required egress system within the smoke zone.
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909.8.1 Fire Protection and Life Safety Systems, Smoke Layer
The height of the lowest horizontal surface of the smoke layer interface shall be maintained not less than 6 feet (1829 mm) above a walking surface ...
909.8.1 Fire Protection and Life Safety Systems, Smoke Layer
The height of the lowest horizontal surface of the smoke layer interface shall be maintained not less than 6 feet (1829 mm) above a walking surface ...
513.8.1 Exhaust Systems, Exhaust Rate
The height of the lowest horizontal surface of the accumulating smoke layer shall be maintained not less than 6 feet (1829 mm) above any walking ...