Mechanical · M-4EC2H

Combination Fire/Smoke Damper

Materials

Elements

Partitions Insulation Connections / Plates Roof / Floor Openings

About this detail

A combination fire and smoke damper is installed within a fire-rated partition assembly. The assembly incorporates a galvanized steel sleeve of gauge matching or exceeding the connecting duct, fastened to the damper frame and perimeter angles with caulking between the frame and sleeve. Perimeter angles are minimum 14-gauge galvanized steel measuring 1-1/2 inches by 1-1/2 inches, providing a 1-inch minimum overlap of the opening on all four sides without fastening to the partition. An airtight, breakaway duct connection is utilized, and the opening is provided with a 15/16-inch to 1/2-inch clearance on height and width, filled with firestop material. An access panel is positioned within 12 inches of the fire/smoke damper to allow servicing of the fusible rod and link, with the actuator located out of the air stream and a damper position switch included.

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