In this author’s role as a technical solutions manager with a gypsum wallboard manufacturer, a lot of questions are received about fire-resistance-rated wall partitions and floor-ceilings. Inquiries usually begin with “Can I do...

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”...