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- Newsgroups: misc.consumers.house
- Path: sparky!uunet!charon.amdahl.com!amdahl!rtech!pacbell.com!att-out!cbnewsd!gey
- From: gey@cbnewsd.cb.att.com (gerald.e.yingling)
- Subject: RE: Noisy ductwork question
- Organization: AT&T
- Distribution: usa
- Date: Tue, 26 Jan 1993 18:31:08 GMT
- Message-ID: <1993Jan26.183108.27760@cbnewsd.cb.att.com>
- Keywords: I had similar problem
- Lines: 34
-
- References: <hugh.727972325@wugate.wustl.edu>
-
- I had the same problem on my ranch when I moved a few years ago. My
- ducts are attached (nailed) to the floor joists by metal hangers
- like this: (sorry for the crude ASCII diagram)
-
-
- | | | |
- | | | | < -- Joists
- ---- ----
- ---- ----
- | ^ ^ | <-- hanger
- | \ nails / |
- |------------------| <-- binding on both sides between duct and
- | duct | hanger because the hangers were
- | | where too tight to duct, specially at
- | | top of duct.
- |------------------|
- --- ----
- ^ ^
- \ screws /
-
- I couldn't remove the nails to reposition the hangers to allow more
- room between the top of the duct and the hangers because the top
- of the duct is about 1/2 inch from the joist so I jammed a screwdriver
- between the duct and the hanger and "bowed" the hanger away from the side
- of the duct (on both sides). This allowed the duct to expand as it grows
- longer due to heating and eliminated the gringing, popping noises caused
- when the duct moved relative to the hangers. I thought of putting some
- kind of lubricant but didn't want to put oil (or something that I might
- breath because it might leak into the duct). Every once in a while I
- have to bow one of the hangers out to stop the noise - I probably will
- find a permant solution one of these days. Hope this helps - Jerry
-
-