A metallic pipe or conduit penetrates a two-hour rated gypsum wall board partition framed with steel studs. The annular space around the pipe is sealed with a minimum one-quarter inch diameter bead of 3M fire barrier CP 25N/S caulk complying with Underwriters Laboratories system number WL1001.
CP 25N/S CAULK UL SYSTEM #WL1001 2 HOUR RATING GYP. WALL BOARD STEEL STUD METALLIC PIPE OR CONDUIT 1/4" DIAMETER (6mm) MIN. BEAD OF 3M "FIRE BARRIER CP 25N/S CAULK"
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