The Ontario Building Code | Design of Excavations
4.2.5.1. design of Excavations
(1) The design of excavations and of supports for the sides of excavations shall conform to the requirements of Subsection 4.2.4. and this Subsection.
In Plain Language
The design of excavations and of supports for excavation sides must conform to the general foundation design requirements in Subsection 4.2.4, plus this Subsection's excavation-specific rules.
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.