I like to bolt through the structural member, but have used toggles in some applications. Of course, you need to download the structural specifications and confirm that the toggles are robust enough for the application.
Nick Soleil Project Manager Advanced Alternative Energy Solutions, LLC PO Box 657 Petaluma, CA 94953 Cell: 707-321-2937 Office: 707-789-9537 Fax: 707-769-9037 ________________________________ From: Jason Szumlanski <ja...@fafcosolar.com> To: RE-wrenches <re-wrenches@lists.re-wrenches.org> Sent: Wed, December 22, 2010 11:25:08 AM Subject: Re: [RE-wrenches] PV On Corrugated Metal Roof on Steel Building That’s a good point about the scaffolding. I was thinking about a SnapNRack corrugated bracket bolted through the purlins. 5/16 Tek screws to fit the bracket may be the way to go – I’ll get the engineer to look at it. I’m hoping to minimize penetrations, yet meet the 130 mph wind speed. Based on the pictures I was provided, it looks like the roof will handle the load… we’ll see. Thanks for the tip. Jason Szumlanski Fafco Solar From:re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Allan Sindelar Sent: Wednesday, December 22, 2010 12:47 PM To: RE-wrenches Subject: Re: [RE-wrenches] PV On Corrugated Metal Roof on Steel Building Jason, We have installed to similar buildings using #14 tek screws. If you look into their rated pullout strength, you'll find that the large gauges have surprising pullout resistance in purlins. And no interior scaffolding is required. Allan AllanSindelar al...@positiveenergysolar.com NABCEP Certified Photovoltaic Installer EE98J Journeyman Electrician Positive Energy, Inc. 3201 Calle Marie Santa Fe, New Mexico 87507 505 424-1112 www.positiveenergysolar.com On 12/22/2010 10:01 AM, Jason Szumlanski wrote: We are working on a contract to put PV on a steel building with a corrugated metal roof. The corrugated metal is not a problem – we have solutions for that. I am wondering about how to best attach to the structural members. For an idea of what we are up against, see: http://www.fafcosolar.com/download/349/IMG_0828.JPG Any suggestions for attachment methods? Jason Szumlanski Fafco Solar _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
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