Code Library › Volume 1 › Section 9.24 — Sheet Steel Stud Wall Framing
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.24.2.4.Openings in Fire Separations

(1) Where openings for doors in non-loadbearing fire separations required to have a fire-resistance rating do not exceed 1 200 mm in width, (a) the width of steel studs shall be not less than 63 mm, and (b) the metal thickness shall be not less than 0.46 mm. (2) Where openings described in Sentence (1) exceed 1 200 mm in width, (a) the width of steel studs shall be not less than 91 mm, and (b) the metal thickness shall be not less than 0.85 mm. (3) The distance to the first stud beyond the jamb of any door opening in a fire separation required to have a fire- resistance rating shall not exceed 400 mm. (4) Where the distance between the framing over the opening referred to in Sentence (3) and the top runner exceeds 400 mm in such walls, intermediate support shall be installed at intervals of not more than 400 mm above the opening.
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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.