The Ontario Building Code | Size of Sill Plates
9.23.7.1. Size of Sill Plates
(1) Where sill plates provide bearing for the floor system they shall be not less than 38 mm by 89 mm material.
In Plain Language
Sill plates, the wood member bolted to the top of the foundation wall, must meet the minimum size requirements set out in this article.
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.