An Underwriters Laboratories firestop system detail designated as UL System No. W-L-6002 by 3M Company establishes a two-hour F rating and a two-hour T rating for penetrations through fire-rated assemblies. A wall or floor assembly features numbered components indicating fill, void, or cavity materials, wrap strips, and penetrating items. Section A-A provides cross-sectional dimensions and layered material placement for code compliance.
SECTION A-A MAY 19, 2005 F RATING - 2 HR T RATING - 2 HR A A 5 1B 1A 7 3 4 6 2 5 6 UL SYSTEM NO. W-L-6002 (3M COMPANY)
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