[RE-wrenches] Racking for Steep Roofs

Fri Oct 16 14:27:29 PDT 2015

Thanks Allan.  I’ll see if I can get those values from IronRidge or UniRac.
If not Pro Solar or SnapNrack look like they both could work well.

Thanks again all.  

Garrison 

From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On
Behalf Of Allan Sindelar
Sent: Thursday, October 15, 2015 5:15 PM
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Subject: Re: [RE-wrenches] Racking for Steep Roofs

Garrison,
I'm here in a campground in the Emerald Triangle with Jeff Spies, who works
for Quick Mount PV, and so I read him your message. He suggested that you
take the engineering specs from UniRac and IronRidge to the AHJ, showing her
pullout and shear capacities and calculate both for your site, including
snow and wind loads. The maximum applied load should be less than the
published working load rating.

If the AHJ doesn't accept this approach, the next step is to get a
structural engineer to review the same and wet-stamp the result.

This legitimately gets around the manufacturers' certification issue on an
individual case basis.

Allan

Allan Sindelar
allan at sindelarsolar.com <mailto:allan at sindelarsolar.com> 
NABCEP Certified PV Installation Professional
NABCEP Certified Technical Sales Professional
New Mexico EE98J Journeyman Electrician
Founder (Retired), Positive Energy, Inc.
505 780-2738 cell

On 10/15/2015 1:50 PM, Garrison Riegel wrote:

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  <mailto:re-wrenches at lists.re-wrenches.org>
<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 |  <http://www.solarserviceinc.com/> Solar Service Inc

[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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