Tool Helps Determine Fire Resistance Ratings of Truss Assemblies

Originally published by: SBCANovember 2, 2015

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There’s a new tool to help the market verify that proposed truss assemblies meet building code requirements. Codes generally require a minimum fire rating between uniquely occupied spaces. For example, a design might need to specify a particular fire resistance value in the walls or floors that separate apartments within a building, homes in a row house or other dense urban residential lots, or office and warehouse space in a single facility.

SBCA has recently published an updated and expanded research report on the fire resistance ratings of various truss assemblies. The revised document covers more assembly designs and options than the previous version. It also incorporates new products as well changes to insulation and other guidelines from organizations like the Gypsum Association and Underwriters Laboratories (UL).

Just like the old report, the new document is intended as a quick reference for component manufacturers responding to questions from architects and engineers. Designers looking for details about the expected fire resistance rating of a finished truss assembly will still need to reference the original sources listed in the report. The new report can be found at sbcindustry.com. Go to Technical > Fire Issues in the menu to find the Fire Resistance Rated Truss Assemblies (SSRR No. 1509-01) document.