Clearances Required Between Damper Sleeves And Wall/Floor Openings - Greenheck DFDR Series Installation, Operation And Maintenance Manual

Clearances Required Between Damper Sleeves and Wall/Floor Openings

Fire damper assemblies expand during periods of intense heat. Therefore, it is essential that openings in walls or
floors be larger than the fire or combination fire smoke damper assembly to allow for this expansion. The wall/floor
opening must be a minimum of
4 Round Fire and Combination Fire Smoke Dampers
DO NOT PLACE
RETAINER PLATE
IN THIS GROOVE.
DAMPER FRAME
DO NOT PLACE
RETAINER PLATE
IN THIS GROOVE.
Figure 3: wood stud
DAMPER FRAME
METAL
STUD
DO NOT PLACE
RETAINER PLATE
IN THIS GROOVE.
Figure 4: metal stud
DAMPER FRAME
DO NOT PLACE
RETAINER PLATE
IN THIS GROOVE.
⁄ in. (22 mm) larger than the outside diameter of the damper.
7
8
Maximum Size Table
Damper Model
DFDR-510
FDR-510
FSDR-511
FSDR-512
SEDFDR-510
SEFSDR-511
SSDFDR-510
SSFDR-510
SSFSDR-511
WOOD
STUD
1.00
MIN
1.00
MIN
WOOD
STUD
1.00
MIN
Maximum Size
24 in.
(610 mm)
®