FIRE DAMPERS / SHUTTER TYPE
K-VENTIL ventilation equipment
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maximum of 1 in.(25mm) from corners.A minumum of 4 attachments (2 on each side of the
blade channel) pers ide (16 per damper) are required.
One of the methods of attachment shown below must be used.
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tack or spot welds ( sleeves thicker than 16 Ga shall not be provided with spot
welds ).
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10 sheet metal screws
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1/4 in. (6mm) bolts and nuts
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3/16 in. (4.7mm) steel pop rivets
Securing Fire Damper and Sleeves to Wall Openings
The fire damper must be installed such that the centerline of the blades are mounted in the
plane of the wall.Fire damper and sleeve assemblies must be installed in wall openings using
retaining angles on each side of the wall as described below:
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Retaining angles for 1½ hour rated dampers with a height 36 in.(914mm) or less must
be a minumum of 16 ga. (1.5mm).The leg of the retaining angle on the damper sleeve
shall be a minumum of 2 in. (51mm).The leg of the retaining angle on the wall shall
be long enough to cover the annular space and overlap the wall by a minumum of 1
