Mechanical · M-BS9GA

Combination Fire/Smoke Damper

Materials

Concrete Steel Masonry / CMU

Elements

Beams Walls Partitions Doors Connections / Plates Roof / Floor Openings

Connections

Expansion / Slip Connection

About this detail

A UL 555 and 555S listed combination smoke and fire damper is installed within a rated wall or enclosure opening using manufacturer-furnished sleeves and perimeter mounting angles fastened on all four sides. The opening requires a minimum one-quarter inch to maximum three-quarter inch clearance between the sleeve and framed opening, with steel lintels and fire-resistive lining applied as needed for non-masonry partitions. Duct connections use typical "S" type slip joints with transitions sized four inches larger in length and width than connecting ducts up to twenty-four by twenty-four inches. Electrical components include a solenoid type electric actuator, junction box, smoke detector installed within five feet, and a dual position switch for remote annunciation.

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