Code Library › Volume 1 › Section 9.20 — Masonry and Insulating Concrete Form
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.20.2.7.Compressive Strength

(1) The compressive strength of concrete blocks shall conform to Table 9.20.2.7. Table 9.20.2.7. Compressive Strength of Concrete Blocks Forming Part of Sentence 9.20.2.7.(1) Minimum Compressive Strength Over Net Area, MPa Type of Unit Exposed to Weather Not Exposed to Weather Solid or hollow concrete blocks 15 10 Solid loadbearing cellular blocks Not permitted 5 Solid non-loadbearing cellular blocks Not permitted 2

This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.

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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.