The Ontario Building Code | Support of Footings
(1) footings shall rest on undisturbed soil, rock or compacted granular fill.
(2) Granularfill shall not contain pyritic material in a concentration that would adversely affect its stability or the performance of assemblies separating dissimilar environments.
In Plain Language
Footings must be supported as set out in this article, ensuring they rest on soil capable of bearing the loads transferred down through the foundation.
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.