[RE-wrenches] Expansion on conduits on commercial roof tops!

[Glenn Burt]

If you are talking about commercial flat roofs, we never use PVC - too much
expansion potential.

All our rooftop conduit runs here in the Albany, NY area are RMC of the
galvanized type, and of course, threaded. 

There are standard plumbing supports with rollers, as well as standard
expansion fittings (be sure to match the fitting to the conduit - don't use
EMT with RMC unless approved by the manufacturer).

A great product we have recently begun using is a EPDM pipe support by the
Rubber Triangle Company that is compatible with most rubber roofing, and
allows a lot of movement.

 

-Glenn

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of James
Rudolph
Sent: Thursday, December 22, 2011 9:39 AM
To: RE-wrenches
Subject: [RE-wrenches] Expansion on conduits on commercial roof tops!

 

Howdy Wrenches,

I was wondering how everybody is dealing with expanding conduits on roof
tops? Do we have an accepted best practice on this?. What I am really
looking for is a way to starp long conduit runs on commercial rooftops in
direct sun that allow movement and expanision joints to do thier job.

Mahalo in advance!



James B Rudolph
NABCEP Certified PV Installer 



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