Code Library › Volume 1 › Section 3.1 — General
PART 3 — FIRE PROTECTION, OCCUPANT SAFETY AND ACCESSIBILITYUpdated for the 2024 Ontario Building Code

3.1.7.3.Exposure Conditions for Rating

(1) Floor, roof and ceiling assemblies shall be rated for exposure to fire on the underside. (2) Firewalls and interior vertical fire separations shall be rated for exposure to fire on each side. (3) Exterior walls shall be rated for exposure to fire from inside the building.
← Previous3.1.7.2. Exception for Exterior WallsNext →3.1.7.4. Minimum Fire-Resistance Rating

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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.