Mechanical · M-5PB4F

Combination Fire/Smoke Damper

Materials

Steel Metal (misc.)

Elements

Walls Partitions Doors Roof / Floor Openings

Connections

Welded Connection Bolted Connection

About this detail

An Underwriters Laboratories combination fire and smoke damper is installed within a wall opening utilizing a 14-gauge sleeve collar secured with an S-drive joint. One-and-a-half-inch by 1-1/2-inch by 1/8-inch mounting angles are placed on both sides of the opening, overlapping the wall a minimum of 1 inch. These mounting angles attach directly to the sleeve using number 10 sheet metal screws, welds, or 1/4-inch by 20 bolts spaced at a maximum of 12 inches on center with at least two connections per side, top, and bottom. A gasketed access door is provided in the adjacent sheet metal duct near the damper, alongside a damper actuator. All dampers must be Underwriters Laboratories labeled, California State Fire Marshal listed, and installed strictly per manufacturer printed instructions.

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