Mechanical · M-VQRP9

Fire Smoke Damper Horizontal Floor Penetration Detail

Materials

Steel Metal (misc.)

Elements

Walls Doors Floors / Slabs Connections / Plates Roof / Floor Openings

Connections

Welded Connection Bolted Connection

About this detail

A fire and smoke damper assembly penetrates a fire-rated floor constructed by the general contractor. The rectangular duct connects to a galvanized sheet metal sleeve using a sheet metal connection or transverse duct flange joint, with sleeve thickness specified as minimum sixteen gauge for duct sizes up to thirty-six by twenty-four inches and fourteen gauge for larger sizes. Angle retainers secure the assembly to the floor, overlapping the opening by a minimum of one inch on each side and attached exclusively to the sleeve without interfering with damper operation. The normally open damper blade assembly includes an operator or actuator with an operating shaft, fusible rod, fusible link with lock, and negator spring. An access door with a permanently attached fire and smoke label is positioned on the ductwork adjacent to the assembly.

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