Advertisement
Fire Dampers (Static & Dynamic)
Installation Instructions
Breakaway Connections
Figure 4 - 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 connections.
• Standing "S' joints can be applied with no.
10 sheetmetal screws (through joint and
duct) subject to the following limitations:
Maximum 2 screws in each side and in
bottom joint.
• Transverse joints illustrated can be
applied as top and bottom joints with
Drive Slip - side joints in duct heights up
to 20 inches. (508 mm)
Round and Oval Duct Breakaway Connections
Round or flat oval ducts connected to Type R, CR or OC damper collars may use #10 sheetmetal screws as follows:
• Ducts to 22" (559 mm) wide (or dia.) and smaller may use 3 screws.
• Ducts larger than 22" (559 mm) wide (or dia.) and up to 36" (914 mm) dia. may use 5 screws.
• Ducts larger than 36" (914 mm) wide (or dia.) may use 8 screws.
NOTE: All breakaway connections described may have duct sealant applied in accordance with SMACNA reccomendations.
Figure 5 - Manufactured Flanged
System Breakway Connections
Flanged connection systems manufactured
by Ductmate, Ward, and Nexus are approved
as breakaway connections when installed
as illustrated.
Figure 6 - Proprietary Flange System
Breakaway Connections
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" (152 mm) metal clip may be
used with spacing as shown in diagram.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright E.H. Price Limited 2006.
Jul / 06 245001 SHEET 3 OF 4
Advertisement
