Tag Archives: ULC

Understanding ULC-listed fire-resistant designs

As a regulatory representative of Underwriters Laboratories of Canada (ULC), this author sees an increasing number of building designers submitting plans to approving authorities with fire-resistant-rated assemblies as being “based on Design No. XXXX” instead of using the actual listed one. However, a design submitted as being “based on” is not the design “listed” by ULC.

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