The Ontario Building Code | Paint
9.17.3.3. Paint
(1) exterior steel columns susceptible to corrosion shall be treated on the outside surface with at least one coat of rust-inhibitive paint.
In Plain Language
Steel columns must be painted or otherwise protected as set out in this article, guarding against corrosion over the building's service life.
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.