Mechanical · M-EM7N4

Fire Smoke Damper Horizontal Floor Penetration

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 slab within a rectangular duct system. The damper features a normally open blade assembly housed in a galvanized sheet metal sleeve of minimum sixteen or fourteen gauge depending on duct size, with angles overlapping the floor slab by a minimum of one inch in each direction. Connections between the ductwork and sleeve utilize sheet metal joints secured with number ten screws, quarter-inch bolts, three-sixteenth-inch steel rivets, quick-lock joints, or welds spaced at maximum eight-inch centers with at least two per side. The actuator, operator shaft, and fusible link mechanism are positioned to ensure unobstructed operation, and an access door with a permanently attached label is provided for maintenance.

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