Notice: This site currently shows the 2012/2017 edition of the Ontario Building Code. The current legally effective code is the 2024 edition (O.Reg. 163/24), in effect since January 1, 2025. Confirm current requirements at ontario.ca.
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The Ontario Building Code | Exterior Wood Steps

9.8.9.3. exterior Wood Steps

(1) exterior wood steps shall not be in direct contact with the ground unless suitably treated with a wood preservative.

In Plain Language

Exterior wood steps have their own construction requirements set out in this article, addressing decay resistance and structural adequacy for outdoor use.

This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.