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1 2 3 4 5 6 7 8 3.15 FIRE RESISTANCE & UL TrusSteel and UL Building codes often have requirements that building elements perform for a specific period of time when subjected to the elevated temperatures associated with a fire event, based upon the defined type of building/occupancy. One of these requirements is that the building element must withstand a fire event while supporting a specific load. One method of documenting this performance is by testing at Underwriters Laboratories, Inc. (UL). UL has the ability to perform fire tests on building elements and assemblies according to standards published by the American Society of Testing and Materials (ASTM). Building elements and assemblies that pass this testing qualify as Listed UL assemblies. Building assemblies containing TrusSteel trusses have been tested at UL, and these assemblies have been Listed as having 1 hour, 1-1/2 hour and 2 hour fire resistive properties as described and when utilized as described in the UL reports listed in this Guide. TrusSteel has earned the UL Classification Mark as to its fire-resistive properties. This mark appears on TrusSteel members for easy identification. Insurance rating bureaus and many Federal, state, county and municipal authorities and inspectors recognize UL listings. The building designer is responsible for determining the suitability of use for UL Listed assemblies in specific building designs. Online Updates Underwriters Laboratories (UL) Listed Fire Resistive Designs with TrusSteel trusses have proven to be key documents in gaining the confidence and specifications of architects, engineers and end users. TrusSteel Listed Fire Rated Assemblies have also proven to be living documents, undergoing frequent updates as TrusSteel, along with our partner companies in these listings, continues to expand the Listings to include different materials and material configurations. For this reason, we do not provide a printed copy of these Listings but rather encourage designers to visit the UL Web site and view or download the most current Listings. To find these Listings, point your browser to http://www.ul.com and search on the Design Numbers listed in this Guide, or perform a keyword search for "TrusSteel" under the Certifications section of the website. UL Listings TrusSteel products qualify for hourly ratings as shown below. Assemblies TrusSteel components bear the UL Recognized Component mark. ENGINEERED BY ALPINE S P E C I F Y I N G / D E S I G N I N G