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

3.1.13.12.Encapsulated Mass Timber Construction

(1) In a building or part of a building permitted to be of encapsulated mass timber construction, (a) the flame-spread ratings required by Subsection 3.1.6. shall apply in addition to the requirements in this Subsection, and (b) the flame-spread ratings for exits required by this Subsection shall also apply to any surface in the exit that would be exposed by cutting through the material in any direction, except that this requirement does not apply to doors, structural mass timber elements conforming to Sentence 3.1.6.4.(3), heavy timber construction and fire-retardant- treated wood.
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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.