Breakaway Connections - Greenheck ODFD Series Installation, Operation And Maintenance Instructions

Metal Stud Construction
Gypsum Wallboard
Retaining
Angle
In metal stud construction,
Damper
exposed steel surfaces need
Sleeve
not be covered with gypsum
wallboard.
Figure 6
Wooden Stud Construction
Gypsum Wallboard
Traditional Breakaway Style Transverse Joints
Transverse joints illustrated at right have always been
approved as breakaway connections. SMACNA testing
has also approved the following variations as breakaway
Retaining
connections.
Angle
• The breakaway connections shown (Figure 8) can
be applied with maximum of
two #10 (19mm) sheet metal
In wood stud construction,
Damper
Sleeve gypsum wallboard must cover
screws on each side and on
all wood stud surfaces.
the bottom located in the
center of the slip pocket and
penetrating both sides of the
slip pocket.
• Transverse joints illustrated can be applied as top
and bottom joints with Drive Slip - side joints in duct
heights up to 20 inches (508mm)
See Figure 7.
Round and Oval Duct Breakaway Connections
Round or flat oval ducts connected to Type R or O damper
collars shall be attached with #10 (19mm) sheet metal
screws as follows:
• Ducts to 22 in. (558mm) wide (or dia.) and smaller
shall have three screws.
• Ducts larger than 22 in. (558mm) wide (or dia.) up to
and including 36 in. (914mm) wide (or dia.) shall have
five screws.
NOTE: All breakaway connections described may have
duct sealant applied, 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.
Manufactured Flanged System Breakaway
Connections
Flanged connection systems manufactured by Ductmate,
Ward, and Nexus are approved as breakaway connections
when installed as illustrated (Figure 9).
Stud or Runner
1 in. Min.

Breakaway Connections

Stud or Runner
1 in. Min.
Drive Slip Joint
Figure 7
Damper
Sleeve
Retaining
Angle
Damper
Sleeve
Figure 7
Plain "S" Slip
Inside Slip Joint
Standing "S" (Alt.)
Figure 8
6 in. long 1 /16 in. max.
thickness plastic cleats;
12 in. c-c (min. 1 per side)
Flanged system angles
(Attach per
manufacturer's
instructions)
Duct
Figure 9
Proprietary Flange System Breakaway Connections
,
®
(TDC by Lockformer, TDF by Engle)
TDC and TDF systems are approved as breakaway
connections when installed as described in the TDC or TDF
addendum to the SMACNA Duct Construction Standards
except the corners may not be bolted. Standard 6 in.
(152mm) metal clip may be used
with spacing as shown in Figure
10. 3/8 in. (9.5mm) metal bolts
and nuts may be used to fasten
together corner pieces (see
Figure 11).
exposed steel surfaces need
not be covered with gypsum
wallboard.
Wooden Stud Construction
Gypsum Wallboard
Stud or Runner
In wood stud construction,
gypsum wallboard must cover
all wood stud surfaces.
Hemmed "S" Slip
Standing "S"
Standing "S"
(Bar Reinforced)
Sleeve
1 in. Min.
Double "S" Slip
Standing "S" (Alt.)
Standing "S"
(Angle Reinforced)
Fire Damper Sleeve
Do not bolt corners
Neoprene gasket
between all angles
60 in. Duct
4 Req'd.
48 in. Duct
3 Req'd.
36 in. Duct
Duct
Typical TDC/TDF joint
11
Clip Spac
6 in
3 Req'd.
24 in. Du
2 Req'd
18 in
S
1