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0 members (),
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Key:
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Joined: Dec 2000
Posts: 4,294
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Well, not really, but it looks like the fittings were supplied by the plumber. When are these required? ![[Linked Image]](https://www.electrical-contractor.net/forum/el/tipark.jpg)
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Joined: Feb 2004
Posts: 1,440
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Looks like someone's creation to buffer vibration from the conduit run or possibly for expansion/contraction....
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Joined: Sep 2004
Posts: 167
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I've seen the rubber ones used in bridges. Normally for seismic joints FMC or LTFMC is used.
Maybe using these is cheaper than LTFMC for machinery vibration.
Larry LeVoir
Inspector
City of Irvine, CA
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Joined: May 2005
Posts: 984 Likes: 2
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Those are called "deflection couplings". They're used when the conduit on one side may end up misaligned with the other due to movement or vibration. You can find them in the Appleton catalog.
Ghost307
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Joined: Aug 2003
Posts: 1,374
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How does the conduit stay bonded with these?
Ryan Jackson,
Salt Lake City
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Joined: Mar 2001
Posts: 2,056
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Probably bonding is accomplished with a flexible braid or strap.
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Joined: Aug 2001
Posts: 599
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Joined: Jun 2004
Posts: 1,273
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They look like the technology developed by the USAF for ICBM and command bunkers for nuclear war.
In such systems, everything -- I mean everything -- is on flexi-mounts so as to work after a Richter 15 earthquake.
Specified normally in government contracts only.
Tesla
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Joined: Dec 2000
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Nick, I'm not surprised that you recognize these! ![[Linked Image]](https://www.electrical-contractor.net/ubb/smile.gif) This is insisde the parking structure at Treasure Island, Las Vegas......One of your little projects.
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Posts: 440
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