[RE-wrenches] Racking for Steep Roofs

[Jeff Irish]

Did you look at Unirac SunFrame?  It uses shared rails and a continuous cap strip.  The installers can also set the modules in the rail which is really nice on steep roofs.  If you are in a freeze/thaw climate contact me off-line because there’s a subtle thermal contraction consideration to allow for.

Jeff Irish
Hudson Solar

From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Garrison Riegel
Sent: Thursday, October 15, 2015 3:50 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Racking for Steep Roofs

Thanks for the responses.

I called UniRac and IronRidge who both confirmed they max out at 45°.  UniRac said anything over 45° is considered a wall and requires different testing and certification.  They said the primary concern is the end clamp which holds the module by friction only.  Mid clamps should hold no problem.  They suggested getting an engineer to stamp a custom bolted end clamp solution and we should be good.

I’ve been looking for a good excuse to try Snap n Rack…

Thanks,
Garrison

From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Aram Alexander
Sent: Wednesday, October 14, 2015 7:39 PM
To: RE-wrenches <re-wrenches at lists.re-wrenches.org<mailto:re-wrenches at lists.re-wrenches.org>>
Subject: Re: [RE-wrenches] Racking for Steep Roofs

Pro solar will work just fine.

Aram

On Oct 14, 2015, at 2:56 PM, Jerry Shafer <jerrysgarage01 at gmail.com<mailto:jerrysgarage01 at gmail.com>> wrote:

I would suggest calling unirac as it may be a software issue that uou are having but they will confirm eitherway
Jerry
On Oct 14, 2015 9:25 AM, "Garrison Riegel" <garrison at solarserviceinc.com<mailto:garrison at solarserviceinc.com>> wrote:
Wrenches,

Can anyone recommend a flush mount racking system for really steep roofs?  I have two projects coming up on 15/12 (~51°) and none of the usual manufacturers we use for flush mounts (IronRidge XR, Unirac SolarMount, Schletter Solo, DPW Powerrail) can handle this apparently…at least according to their design tools and manuals.

Any advice would be much appreciated.

Thanks,
Garrison

Garrison Riegel
PV Operations Manager | Solar Service Inc<http://www.solarserviceinc.com/>
[p] 847-677-0950<tel:847-677-0950> | garrison at solarserviceinc.com<mailto:garrison at solarserviceinc.com>

NABCEP Certified PV Installation Professional™




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