[RE-wrenches] No underside access metal biulding attachment

[Jeff Irish]

EJOTs are a German product designed for this kind of application.  They have an application note that discusses purlin thickness, thread size, and pull out strength.  Mudge Fasteners carries them in the US.

Jeff Irish, PE
President
Hudson Valley Clean Energy, Inc.
and Adirondack Solar
13 Hook Road
Rhinebeck, NY 12572
T.845.876.3767x110
F.845.876.3912
jeff at hvce.com<mailto:jeff at hvce.com>
Solar Electric Systems
NYSERDA Eligible PV Installer
NABCEP Certified PV Installer
NABCEP Certified Technical Sales Professional




From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of toddcory at finestplanet.com
Sent: Thursday, March 15, 2012 3:51 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] No underside access metal biulding attachment


i think bob o once said he used ss pop rivets on a job like this.



todd







On Thursday, March 15, 2012 9:26am, "lars Ortegren" <lars at cal-solar.com<mailto:lars at cal-solar.com>> said:
Wrenches,
We have a project coming up where we are installing a large array on a low slope metal building with metal purlins. Typically we would through bolt our attachment to the purlins, but in this case the building is a self-storage, and access is not an option. Does anyone out there have experience with any top side only metal-metal attachments? I’ve thought about using some larger sized stainless self-tapping screws, but I worry about the pull out strength (as the roof combined with the c-channel purlins are only about 1/8”) and the effects of heat and cooling of the roof backing the screws out over time. Any thoughts ?





Lars Ortegren





Director of Operations
California Solar Electric Company
10141 Evening Star Drive, Suite 6
Grass Valley, CA 95945
http://www.californiasolarco.com/





Phone : (530)274-3671
Fax: (530)274-7518





California C-10 Electical Contractor #779624
NABCEP Certified PV Installer # 091110-89
Certified NABCEP Continuing Education Provider
More about NABCEP:





http://www.nabcep.org/








Sent from Finest Planet WebMail.

--
This message has been scanned for viruses and
dangerous content by Hudson Valley Computer Services<http://www.hvcomputerservices.com/>, and is
believed to be clean.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20120316/f3466828/attachment-0004.html>