[RE-wrenches] Goofy roofing

[August Goers]

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] *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> 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] *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

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