Duct To Sleeve Connection - Greenheck DFD Series Installation, Operation And Maintenance Manual

Duct to Sleeve Connection

Sleeve Gauge and Connection Type Requirements
The size of the damper/duct determines the required
sleeve gauge and the required duct to sleeve
connection (see table to the right). The sleeve thickness
must also not be less than the gauge of the connecting
duct. Any duct connection other than the breakaway
connections described below are considered rigid.
Approved Breakaway Connections
All breakaway connections described below may utilize the following duct sealants: PA2084T duct sealant adhesive
manufactured by Precision, DP1010 water base duct sealant manufactured by Design Polymetrics, Grey Pookie,
Ductmate PROseal®, or CL Ward S Seal in accordance with SMACNA recommendations.
Transverse Joints
The transverse joints shown below are approved as breakaway connections.
• A maximum of two #10 (19mm) sheet metal screws on each side and on the bottom may be used. The
screws should be located in the center of the slip pocket and penetrate both sides of the slip pocket.
• Dampers up to 20 inches (508mm) high may use transverse joints on the top and bottom and Drive Slip
joints (see Figure 17) on the sides.
Plain "S" Slip Hemmed "S" Slip
Inside Slip Joint
Standing "S" (Alt.)
(Bar Reinforced)
Figure 16 - Transverse Joints
Double "S" Slip
Standing "S" Standing "S" (Alt.)
Standing "S" Standing "S"
(Angle Reinforced)
Sleeve Gauge Duct Dimension
14 ga. (0.075 in.)
- 10 ga. (0.138
All duct sizes
in.)
[2mm - 3.5mm]
36 in. (914mm) max. width
16 ga. (0.060 in.) 24 in. (610mm) max.
[1.5mm] height
24 in. (610mm) diameter
16 ga. (0.060 in.)
All duct sizes
[1.5mm]
18 ga. (0.048 in.) 85 in. (2159mm) wide and
[1.2mm]
20 ga. (0.036 in.) 55 in. - 84 in. wide
[0.9mm] (1397mm - 2134mm)
22 ga. (.030 in.) 31 in. - 54 in. wide
[0.76mm] (787mm - 1372mm)
24 ga. (0.024) 13 in. - 30 in. wide
[0.6mm] (330mm - 762mm)
26 ga. (0.018 in.) 12 in. wide and under
[0.46mm] (305mm)
See Breakaway Connection section for additional information.
UL Standard 555 requires all ducts to terminate at fire damper sleeves.
Drive Slip Joint
Figure 17
Multi-Blade Fire and Combination Fire Smoke Dampers
Type of Duct
to Sleeve
Connection
Permitted
Rigid or
Breakaway
Rigid or
Breakaway
over
Breakaway only
9