Code Library › Volume 1 › Section 9.17 — Columns
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.17.4.4.Wood Column Termite Protection

(1) Where termites are known to exist, exterior wood columns, such as porch supports, shall be (a) pressure-treated with a chemical that is toxic to such termites, in accordance with Article 9.3.2.9., or (b) supported on non-cellulosic material extending not less than 150 mm above the finished ground and shall be located not less than 50 mm from the exterior wall of an adjacent 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.