The Ontario Building Code | Capability of Support
7.3.4.1. Capability of support
(1) Piping shall be provided with support that is capable of keeping the pipe in alignment and bearing the weight of the pipe and its contents.
(2) Every floor or wall mounted water closet bowl shall be securely attached to the floor or wall by means of a flange and shall be stable.
(3) Every wall mounted fixture shall be supported so that no strain is transmitted to the piping.
In Plain Language
Piping must be supported in a way that keeps it properly aligned and able to bear its own weight plus the weight of its contents, preventing sagging that could lead to poor drainage or leaks.
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.