PART 4 — STRUCTURAL DESIGNUpdated for the 2024 Ontario Building Code

4.1.7.10.Interior Walls and Partitions

(1) In the design of interior walls and partitions, due consideration shall be given to differences in air pressure on opposite sides of the wall or partition which may result from (a) pressure differences between the windward and leeward sides of a building, (b) stack effects due to a difference in air temperature between the exterior and interior of the building, and (c) air pressurization by the mechanical services of the building.

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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.