Code Library › Volume 1 › Section 9.10 — Fire Protection
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.10.8.8.Floors of Exterior Passageways

(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 with a secondary suite, or (b) a single dwelling unit where no suite is located above or below the dwelling unit. (See also Sentence 9.9.9.3.(2))
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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.