CSA A277 vs. Z240.10: Which Standard Does Your Prefab Project Need?

Understanding the difference between CSA A277 and CSA Z240.10 is essential for anyone importing prefabricated buildings or modular homes into Canada. These standards govern how buildings are constructed, inspected, and certified.

What is CSA A277?

CSA A277 is the "Procedure for Certification of Prefabricated Buildings, Modules, and Panels." It is not a building code itself, but a process that ensures the factory building the structures is following a quality control program that meets the building code of the final destination (e.g., BC Building Code or Ontario Building Code).

What is CSA Z240.10?

Specifically designed for mobile homes and manufactured homes, Z240.10 is a more prescriptive standard. It is typically used for structures that remain on a chassis or are designed to be moved more frequently than a standard modular building.