ARCHIVED - 3.3.5.3.(1)

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3.3.5.3.(1)


Objective	OS1 Fire Safety
Attribution	[F12-OS1.2,OS1.5] [F01-OS1.1]
Application	Application 1: Basements used for the storage, manufacture or handling of volatile solids, liquids or gases that generate explosive air-vapour mixtures or for processes that involve explosive dusts, in buildings described in Sentence 1.3.3.2.(1) of Division A. Application 2: This also applies to: tents and air-supported structures, as stated in Sentences 3.1.6.1.(1) and 9.10.1.2.(1), and rooms and spaces intended for the storage, manufacture or use of hazardous or explosive material, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], as stated in Sentence 9.10.1.2.(4). Exceptions: except as stated in: Sentence 3.1.6.2.(1), which prohibits air-supported structures from being located above the first storey on any building, Sentence 3.1.6.2.(2), which prohibits air-supported structures from being used for classrooms or for Groups B, C, or Group F, Division 1 major occupancies, and Sentence 3.1.6.2.(3), which requires air-supported structures to be designed as open floor spaces without interior walls, mezzanines, intermediate floors or similar construction.
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Intent	Intent 1: To limit the probability that difficult access to basements will delay emergency responders' access to the area of fire origin, which could lead to delays in fire emergency response operations, which could lead to: delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons, and the spread of fire to other parts of the building, which could lead to harm to persons. Intent 2: To limit the probability that difficulty in providing basements with adequate exhaust ventilation will lead to the accumulation of solids, liquids, gases or dusts to ignitable concentrations in low areas of a building, which could lead to a fire or explosion, which could lead to harm to persons.
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