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Duct between fire damper and fire separating construction can be suspended by using threaded rods
and mounting profiles. Load the suspension system depend on weight of the fire damper and duct system.
Max. length between two suspension systems is 1500 mm.
Damper assembly procedures must be done so as all load transfer from the fire separating construc-
tions to the damper body is absolutely excluded. Back-to-back air-conditioning piping must be hung or
supported so as all load transfer from the back-to-back piping to the damper is absolutely excluded.
Threaded rods longer than 1,5 m require fire-resistant insulation.
If the threaded rod is located inside the duct insulation, distance between threaded rod and duct is max
30 mm. If the treaded rod is located outside the duct isolation, distance between threaded rod and
isolation is max. 40 mm. Thickness of the insulation under mounting profile must be min. 30 mm.
Threaded rod fixing to the ceiling construction - see fig. 100
The insulation boards are fastened to the duct by weld pins. Distance between weld pins, distance
between weld pins and flanges is dependent on the materials. For more information see documentation
of insulation manufacturer.
94
Position:
1
Fire damper
2
Duct
3
Insulation
4
Threaded rod
5
Mounting rail
6
Nut
7
Washer
8
Weld pin
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