The Ontario Building Code | Steel Building Systems
4.3.4.3. Steel building Systems
(1) Steel building systems shall be manufactured by companies certified in accordance with the requirements of CSA A660, "Certification of Manufacturers of Steel Building Systems".
4.3.5. Aluminum
In Plain Language
Steel building systems (prefabricated steel structures) must be manufactured by companies certified under CSA A660, ensuring consistent quality control for these factory-built structural systems.
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.