The Ontario Building Code | Specified Load Due to Rain or to Snow and Associated Rain
4.1.6.1. Specified Load Due to Rain or to Snow and Associated Rain
(1) The specified load on a roof or any other building surface subject to snow and associated rain shall be the snow load specified in Article 4.1.6.2., or the rain load specified in Article 4.1.6.4., whichever produces the more critical effect.
In Plain Language
The specified load a roof or surface must resist from rain, or from snow with associated rain, is calculated using the formulas and factors set out in this article and the two that follow it.
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.