Div. B › Part 3 › 3.2 › 3.2.6 — Additional Requirements for High Buildings

3.2.6.6 — Venting to Aid Firefighting

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(1) Means of venting each floor area to the outdoors shall be provided by windows, wall panels, smoke shafts or, except as provided by Sentence (5), the building exhaust system.

(2) Fixed glass windows shall not be used for the venting required by Sentence (1) if the breaking of the windows could endanger pedestrians below.

(3) Openable windows used for the venting required by Sentence (1) shall be permanently marked so that they are easily identifiable.

(4) Elevator hoistways shall not be designed for the venting required by Sentence (1).

(5) In a building that is not sprinklered, venting of floor areas required in Sentence (1) shall not be provided by the building exhaust system.

OBC Definitions

Defined terms on this page

floor area

means the space on any storey of a building between exterior walls and required firewalls, including the space occupied by interior walls and partitions, but not including exits, vertical service spaces and their enclosing assemblies.

sprinklered

means equipped with a system of automatic sprinklers.

building

(a) a structure occupying an area greater than ten square metres consisting of a wall, roof and floor or any of them or a structural system serving the function thereof including all plumbing, works, fixtures and service systems appurtenant thereto,
(b) a structure occupying an area of ten square metres or less that contains plumbing, including the plumbing appurtenant thereto,
(c) plumbing not located in a structure,
(c.1) a sewage system, or
(d) structures designated in the building code; Act

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