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

3.1.6.11.Nailing Elements

(1) Wood nailing elements are permitted to be used for the attachment of a material or assembly of materials to provide an encapsulation rating in a building or part of a building permitted to be of encapsulated mass timber construction, provided the concealed space created by the wood nailing elements is not more than 25 mm deep. (2) Except as permitted by Sentence 3.1.6.16.(2) and Article 3.1.6.6., wood nailing elements are permitted to be used for the attachment of interior finishes in a building or part of a building permitted to be of encapsulated mass timber construction, provided the concealed space created by the wood nailing elements is not more than 50 mm deep and (a) exposed surfaces in the concealed space have a flame-spread rating not more than 25, or (b) the concealed space is filled with noncombustible insulation. 24b Division B – Part 3
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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.