Greenheck FD Series Installation, Operation And Maintenance Instructions page 4
1,5 and 3 hour curtain fire dampers vertical and horizontal mount
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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
SMACNA Duct Construction
Standards. Standard 6in. metal clip
may be used with spacing as shown
in Figure 9. Three-eighth in. metal
bolts and nuts may be used to fasten
together corner pieces.
Recommended Preparation of Openings in
Wood and Metal Stud Walls
• Frame wall openings as shown in Figure 10.
• Double vertical studs are not required for openings
36 in. x 36 in. or smaller.
• Double horizontal studs may be used to frame
opening.
• Gypsum wall board must be fastened 12 in. on
center to all stud and runner flanges surrounding
opening (see Figure 11).
• All construction and fasteners must meet the
requirements of the appropriate wall design. (See
UL Fire Resistance Directory)
Metal Stud Construction
Gypsum Wallboard
Stud or Runner
Retaining
Angle
In metal stud construction,
Damper
exposed steel surfaces need
Sleeve
not be covered with gypsum
wallboard.
Figure 11: Detail of retaining angles and gypsum board application for metal and wooden stud construction.
Sleeve
T ypical TDC/TDF joint
Figure 9: Detail of proprietary flanged system breakaway connections.
Figure 10: Preparation detail for opening in stud wall.
1 in. Min.
Clip Spacing
6 in.
60 in. Duct
4 Req'd.
7 in.
48 in. Duct
3 Req'd.
5 in.
36 in. Duct
Duct
3 Req'd.
24 in. Duct
2 Req'd.
18 in. Duct &
Smaller
1 Req'd.
24 in. o.c.
Maximum
(metal studs)
12 in.
24 in. o.c.
Maximum
16 in. o.c.
Maximum
(wood studs)
Floor Runner
Wooden Stud Construction
Gypsum Wallboard
Retaining
Angle
In wood stud construction,
Damper
Sleeve
gypsum wallboard must cover
all wood stud surfaces.
Copyright © 2003 Greenheck Fan Corp.
Std. Clip
Length
9 in.
6 in.
7 in.
5 in.
5 in.
5 in.
C L
Duct
24 in. o.c.
Ceiling Runner
Maximum
(metal studs)
2 in.
2 Panhead
Screws
2 in.
16 in. o.c.
Maximum
(wood studs)
Stud or Runner
1 in. Min.
IOM-FD/DFD FS
Rev. 6 October 2003
6 in.
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