ARCHIVED - 3.2.6.6.(1)

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3.2.6.6.(1)


Objective	OS1 Fire Safety
Attribution	[F06-OS1.2,OS1.5]
Application	Application 1: Means of venting floor areas to the outdoors. This applies to high buildings, as defined in Sentence 3.2.6.1.(1): of Group A, D, E or F major occupancy classification that are more than: 36 m high, measured between grade and the floor level of the top storey, or 18 m high, measured between grade and the floor level of the top storey, and in which the cumulative or total occupant load on or above any storey above grade, other than the first storey, divided by 1.8 times the width in metres of all exit stairs at that storey, exceeds 300, containing a Group B major occupancy in which the floor level of the highest storey of that major occupancy is more than 18 m above grade, containing a floor area or part of a floor area located above the third storey designed or intended as a Group B, Division 2 occupancy, and containing a Group C major occupancy whose floor level is more than 18 m above grade. Exceptions: except as exempted in: Sentence 3.2.6.6.(2), which applies to fixed glass windows, and Sentence 3.2.6.6.(4), which applies to elevator hoistways.
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Intent	Intent 1: To limit the probability that smoke will build up on floor areas in a fire situation, which could lead to delays or inefficiencies in fire emergency response operations, which could lead to: the spread of fire, which could lead to harm to persons, including emergency responders, and delays in evacuation or moving to a safe place, which could lead to harm to persons.
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