Code Library › Volume 1 › Section 9.15 — Footings and Foundations
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.15.4.7.Reduction in Thickness

(1) Where the top of a foundation wall is reduced in thickness to permit the installation of floor joists, the reduced section shall be not more than 350 mm high and not less than 90 mm thick. (2) Where the top of a foundation wall is reduced in thickness to permit the installation of a masonry exterior facing, the reduced section shall be (a) not less than 90 mm thick, and (b) tied to the facing material with metal ties conforming to Sentence 9.20.9.4.(3) spaced not more than (i) 200 mm o.c. vertically, and (ii) 900 mm o.c. horizontally. (3) The space between wall and facing described in Sentence (2) shall be filled with mortar.
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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.