Fire Protection · G-DBG3A

Through-Penetration Firestop System for Floor or Wall Assembly

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UL System No. C-AJ-1473 features a floor or wall assembly penetrated by a steel pipe, iron pipe, copper tubing, copper pipe, or conduit. The annular space is sealed with a firestop system consisting of packing material, fill, void or cavity materials such as caulk, sealant or putty, and duct wrap material bearing the UL classification mark. The assembly achieves a 2-hour T rating, 3-hour F rating, ambient L rating of 2 CFM per square foot, 400°F L rating of less than 1 CFM per square foot, and Class 1 W rating.

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