A conduit or insulated cable penetrates a fire-rated concrete floor slab with an annular space sealed using damming material such as backer rod, fiberglass, or mineral wool, topped with 3M fire barrier CP 25WB caulk.
DAMMING MATERIAL (BACKER ROD, FIBERGLASS OR MINERAL WOOL) CP 25WB CAULK NOTE: 3M FIRE BARRIER FIRE RATED CONCRETE FLOOR SLAB CONDUIT OR INSULATED CABLES
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