Code Library › Volume 1 › Section 9.40 — Reinforced Concrete Slabs (See Note A-9.40.)
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.40.1.1.Application

(1) This Section applies to (a) reinforced concrete slabs that are suspended over cold rooms in basements, and are supported by foundation walls along the perimeter of the slab with no additional interior supports, and (b) slabs in which the clear span between supporting walls is not more than 2.5 m along the shortest dimension of the slab. (2) Slabs for conditions other than described in Sentence (1) shall be designed in accordance with Part 4. (3) This Section does not apply to reinforced concrete slabs intended to support motor vehicles.
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When do the reinforced concrete slab rules apply, such as garage slabs over basements, in Ontario?What reinforcement and concrete requirements apply to suspended slabs in Ontario houses?

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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.