In Plain Language

Lumber must have a moisture content within the range set out in this article, since lumber that's too wet can shrink, warp, or lose strength as it dries after construction.

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.