A UL-listed firestop system for electrical nonmetallic tubing penetrating a rated floor or wall assembly. The assembly consists of steel studs faced with gypsum board on both sides, penetrated by a metallic sleeve containing the nonmetallic conduit. The annular space between the sleeve and the tubing is sealed with a specified fill, void, or cavity material. The installation achieves specific hourly F-ratings and T-ratings as well as ambient and elevated-temperature L-ratings per the indicated UL system.
SECTION A-A UL SYSTEM NO. W-L-2075 (HILTI) F RATINGS - 1 AND 2 HR (SEE ITEM 4) T RATINGS - 0 AND 2 HR (SEE ITEM 4) L RATING AT AMBIENT - LESS THAN 1 CFM/SQ. FT. L RATING AT 400°F - 4 CFM/SQ. FT. A A 1A 1B 3 4 1. FLOOR OR WALL ASSEMBLY A. STUDS B. GYPSUM BOARD* 2. METALLIC SLEEVE 3. ELECTRICAL NONMETALLIC TUBING+ 4. FILL, VOID OR CAVITY MATERIAL* 2
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