This assembly details a one-hour fire-resistant head of wall intersection beneath a concrete floor or roof slab protected by sprayed fire-resistive material. A continuous twenty-two gauge minimum three-inch deep leg deflection track is attached to the deck at twelve inches on center maximum. The gap between the slab and the top of the wall is filled with mineral wool insulation. A continuous two-inch wide by twenty-two gauge metal strap receives gypsum board attached at eight inches on center maximum. Spray-applied firestop material overlaps a minimum of two inches onto the sprayed fire-resistive material and one-half inch onto the wall.
1" CONCRETE FLOOR OR ROOF SLAB SPRAYED FIRE RESISTIVE MATERIAL STEEL FURRING METAL LATH SPRAYED FIRE RESISTIVE MATERIAL SPRAY APPLIED FIRESTOP MATERIAL MIN 2" OVERLAP ONTO SPRAYED FIRE RESISTIVE MATERIAL, 1/2" ONTO WALL FILL GAP BETWEEN SLAB AND TOP OF WALL WITH MINERAL WOOL INSULATION CONT 2" WIDE X 22 GA MTL STRAP - ATTACH GYP BD TO STRAP AT 8" OC MAX CONT 22 GA MIN 3" DEEP LEG DEFLECTION TRACK ATTACH TO DECK AT 12" OC MAX 1 1/2"
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