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  #1  
Old 07-02-2007, 01:50 PM
Doublecut Doublecut is offline
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Default Fire Damper Question

I am trying to find out if 2 fire dampers can be attached together and put into a sleeve for a large size ductwork, if so if anyone would have any input or know of a good web site for fabrication standards on the means to assemble the two. Any input would be greatly appreciated.
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Old 07-02-2007, 04:34 PM
danski0224 danski0224 is offline
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Yes, large factory assembled units come that way.

The sections can be either welded or screwed together.

The only thing I can think of is whether or not your fabricated assembly would have a UL rating, especially if you just want to get rid of a couple of dampers laying around in the shop...
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Old 07-02-2007, 09:26 PM
rsonnier rsonnier is offline
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The attached website is actually the UL website for Fire dampers. http://www.ul.com/regulators/dampers.cfm

Ruskin and Greenheck also have good information on fire dampers.
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Old 07-02-2007, 09:56 PM
tnbndr tnbndr is offline
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You must follow each manufacturers instructions for installation in order to meet UL listings. Each manufacture conducts their own UL tests with their products. Most specs and codes will state to follow the manufacturers instructions.
Most dampers can be banked but each is done differently.
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Old 07-04-2007, 05:58 PM
jw05450 jw05450 is offline
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Yes u most defianatly can put them together.I just did a fire damper in which i had them side bye side and i put duct mate frame on them.This worked fine.
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Old 07-09-2007, 06:37 PM
Doublecut Doublecut is offline
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Just wanted to say a big thanks for the replies and do appreciated it very much. I am back to work tommorow after a week of holidays and will be fabricating the sleeves for the fire dampers. I have made fire dampers sleeves in the past but have never had to bank any together , therfore I was a little concerned whether this should be done or not.
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