Div. B › Part 9 › 9.10 › 9.10.8 — Fire-Resistance, Combustibility and Sprinklers in Relation to Occupancy, Height and Supported Elements

9.10.8.8 — Floors of Exterior Passageways

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(1) Except as provided in Sentences (2) and (3), the floor assembly of every exterior passageway used as part of a means of egress shall have a fire-resistance rating of not less than 45 min or be of noncombustible construction.
(2) No fire-resistance rating is required for floors of exterior passageways serving buildings of Group D, E or F major occupancy that are not more than 2 storeys in building height.
(3) No fire-resistance rating is required for floors of exterior passageways serving,
(a) a house or an individual dwelling unit in a house, or
(b) an individual dwelling unit in a building other than a house where no suite is located above or below the dwelling unit.
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