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.
14 ga. (0.075 in.) - 10 ga. (0.138 in.)
See Breakaway Connection section for additional information.
UL Standard 555 requires all ducts to terminate at fire damper sleeves.
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 Polymerics, 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 (19 mm) 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 in. (508 mm) high may use transverse joints
on the top and bottom and Drive Slip joints (see Figure 16) on
the sides.
Round and Oval Duct Breakaway Connections
Round or flat oval ducts connected to Type R or O damper
collars shall be attached with #10 (19 mm) sheet metal screws
as follows:
• Ducts up to 22 in. (558 mm) wide (or dia.) and less shall
have three screws.
• Ducts larger than 22 in. (558 mm) wide (or dia.) up to and
including 36 in. (914 mm) wide (or dia.) shall have five
screws.
Factory furnished duct collars, type R and O, are also
considered breakaway (see Figure 17).
®
Sleeve Gauge
[2 mm - 3.5mm]
16 ga. (0.060 in.) [1.5 mm]
16 ga. (0.060 in.) [1.5 mm]
18 ga. (0.048 in.) [1.2 mm]
20 ga. (0.036 in.) [0.9 mm]
22 ga. (.030 in.) [0.76 mm]
24 ga. (0.024 in.) [0.6 mm]
26 ga. (0.018 in.) [0.46 mm]
Duct Dimension
All duct sizes
36 in. (914 mm) max. width
24 in. (610 mm) max. height
24 in. (610 mm) diameter
All duct sizes
85 in. (2159 mm) wide and over
55 in. - 84 in. wide
(1397 mm - 2134 mm)
31 in. - 54 in. wide
(787 mm - 1372 mm)
13 in. - 30 in. wide
(330 mm - 762 mm)
12 in. wide and under (305 mm)
Plain "S" Slip
Inside Slip Joint
Standing "S" (Alt.)
Figure 15 - Transverse Joints
Type R and O
factory furnished
duct collars qualify
as breakaway
connections.
Figure 17: Type R and O Transition
Type of Duct to Sleeve
Connection Permitted
Rigid or Breakaway
Rigid or Breakaway
Breakaway only
Hemmed "S" Slip Double "S"
Wall or Floo
Standing "S" Standing "S" (Alt.)
Sleeve
Standing "S" Standing "S"
(Bar Reinfor ced) (Angle Reinfor
Duct
Damper
Type B
Drive Slip Joint
Figure 16
Wall or Floo
Sleeve
Duct
Damper
Type R, O
Curtain Fire Dampers
Slip
r
ced)
r
9