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-boun...@lists.re-wrenches.org
<mailto:re-wrenches-boun...@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 <aug...@luminalt.com
<mailto:aug...@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-boun...@lists.re-wrenches.org
<mailto:re-wrenches-boun...@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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