[RE-wrenches] Goofy roofing

frenergy frenergy at psln.com
Sat Apr 30 07:47:03 PDT 2016


Benn, August, etc

         Sorry for omitting a somewhat crucial detail....below these 
stringers it is a "standard" residential stacked roof with 2X6 rafters 
on 16" centers with 1/2 " plywood deck. No purlins.  I appreciate the 
feedback/good ideas.

Bill

Feather River Solar Electric


On 4/29/2016 3:28 PM, August Goers wrote:
>
> Benn,
>
> We’ve done it several ways including putting four 14 x 1.5” TYPE 17 
> screws per attachment point through the metal and into the 1” x wood 
> purlin. The key is that the load path all the way down needs to be 
> capable of handling the worst case loads. So we had to check that too. 
> Some racking manufactures such as Unirac have online calculators to 
> give point loads.
>
> Best, August
>
> *From:*RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org 
> <mailto:re-wrenches-bounces at lists.re-wrenches.org>] *On Behalf Of 
> *Benn Kilburn
> *Sent:* Friday, April 29, 2016 2:17 PM
> *To:* RE-wrenches
> *Subject:* Re: [RE-wrenches] Goofy roofing
>
> August, et al;
>
> If the purlins are only 1"x4" or 1"x6" or....1"x anything, are you 
> only relying on the 1" purlin as the attachment point or are you 
> hitting the vertical trusses below the purlins?
>
> We are working on a corrugated roof right now and using a Schletter 
> roof bracket. The name of it escapes me at the moment. Maybe FixT?
>
> We are attaching to purlins which are 2"x6".  I wouldn't think 1"x 
> anything would provide enough pull-out?
>
> Benn Kilburn
>
> SkyFire Energy Inc.
>
> 780-906-7807
>
>
> On Apr 29, 2016, at 9:09 AM, August Goers <august at luminalt.com 
> <mailto:august at luminalt.com>> wrote:
>
>     Hi Bill,
>
>     It sounds like you’re talking about a purlin type setup – 4’
>     sounds a little far apart but I guess that’s what you have to deal
>     with. If you have a corrugated metal roof, we’ve used S-5
>     CurruBrackets screwed through the metal and into the purlins and
>     then either run the solar rail up and down the roof or install a
>     sub-rack system (with strut or angle aluminum) perpendicular to
>     your solar rail.
>
>     Best,
>
>     August
>
>     *From:*RE-wrenches
>     [mailto:re-wrenches-bounces at lists.re-wrenches.org
>     <mailto:re-wrenches-bounces at lists.re-wrenches.org>] *On Behalf Of
>     *frenergy
>     *Sent:* Friday, April 29, 2016 6:55 AM
>     *To:* RE-wrenches
>     *Subject:* [RE-wrenches] Goofy roofing
>
>     Recently, a customer had a metal roof (not standing seam)
>     installed by a "handyman".  Pretty clean installation however for
>     some reason he ran 1X6 stringers across the roof  on the 1/2"
>     plywood deck spaced about every 4 feet (as you go from ridge to
>     eaves).  Of course the roofing screws are at the stringers.  I'm
>     sure he had a /great/ reason for doing so.  So now I have been
>     asked to install an array on this roof.  You can feel how "soft"
>     the roof is as you walk on it of course because you are walking on
>     air-below-metal for most of the roof.  Stringer locations don't
>     jive with possible feet/post locations for rail. I'm usually
>     pretty good at problem solving but I'm accepting ideas.
>
>     Bill
>
>     Feather River Solar Electric
>
>     Bill Battagin, Owner
>
>     4291 Nelson St.
>
>     Taylorsville, CA 95983
>
>     530.284.7849
>
>     CA Lic 874049
>
>     www.frenergy.net <http://www.frenergy.net>
>
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-- 
Feather River Solar Electric
Bill Battagin, Owner
4291 Nelson St.
Taylorsville, CA 95983
530.284.7849
CA Lic 874049
www.frenergy.net

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