Securing The Damper/Sleeve Assembly To Wall/Floor Openings - Greenheck DFD Series Installation, Operation And Maintenance Manual

Sleeve Requirements cont....
Fire dampers must be attached to sleeves as shown
in Figure 6. All four sides of the damper frame must
be attached to the sleeve with one row of attachments
on each side of the blade channel. Attachments must
be spaced a maximum of 6 in. (152mm) O.C. and a
maximum of 2 in. (51mm) from corners. A minimum of
4 attachments (2 on each side of the blade channel) per
side (16 per damper) are required. One of the methods
of attachment shown below must be used:
• tack or spot welds
• #10 sheet metal screws
• ⁄ in. (6mm) bolts and nuts
1
4
• ⁄ in. (4.7mm) steel pop rivets
3
16

Securing the Damper/Sleeve Assembly to Wall/Floor Openings

The fire damper must be installed such that the centerline of the blades are mounted in the plane of the wall or floor.
All fire dampers may utilize the two-sided angle installation method described below. 1
may use the single sided angle installation method up to the following maximum sizes:
• Vertical mount: 80 in. W x 50. in. H (2032mm W x 1270mm H), 50 in. W x 80 in. H
(1270mm W x 2032mm H), or 40 in. W x 100 in. H (1016mm W x 2540mm).
• Horizontal mount: 144 in. W x 96 in. H (3658mm W x 2438mm H)
• Retaining Angle Gauge: Retaining angles for 1½ hour rated dampers with a width and height 48 in. (1219mm)
or less must be a minimum of 20 ga. (1mm). Retaining angles for all 3 hour rated dampers and all dampers with a
width or height greater than 48 in. (1219mm) must be a minimum of 16 ga. (1.5mm).
• Retaining Angle Size: The leg of the retaining angle on the damper sleeve shall be a minimum of 11/4 in. (32mm).
The leg of the retaining angle on the wall/floor shall be long enough to cover the annular space and overlap the
wall/floor by a minimum of 1 in. (25mm).
• Retaining Angle Attachment to Sleeve: Retaining angles must be attached to the damper using one or more of
the following methods of attachment (refer to label on outside of sleeve for 'No Screw' area):
- Tack or spot welds
- #10 ( ⁄ in. [19mm] max.) sheet metal screws
3
4
- ⁄ in. (6mm) bolts and nuts
1
4
- ⁄ in. (5mm) steel pop rivets
3
16
A minimum of two connections per side, top, and bottom, spaced 12 in. (305mm) O.C. maximum are required for
openings of 48 in. W x 36 in. H (1219mm x 914mm) and less. Dampers greater than 48 in. wide (1219mm) or 36 in.
high (914mm) require the connections to be no more than 6 in. (152mm) O.C.
The angles must be attached to all 4 sides of the sleeve. Ensure that fasteners do not interfere with the operation of
the damper. The angles need not be attached to each other at the corners.
6
Curtain Fire Dampers
Attachments--Do not place attachments between blade channels
Blade
Channel
2 in. Max.
6 in. Max.
Figure 6: Field attachment of fire dampers to sleeves.
NOTE: Attachments must not enter blade
channel or they may cause interference with
blade closure. Narrow Line and Ultra Thin
dampers do not have flange for attachments
and must be welded to sleeve.
Attachments can be
staggered or evenly
spaced.
⁄ hour rated fire dampers
1
2