Jason the Ejot Solar Fastener is designed for trapazoidal standing seam rib profiles like you may be up against on this roof. The only drawback is that the m8x1.25 [.312"] self-tapping lag standoffs are not self-drilling. This makes for an extra step in the process requiring an aligned pilot hole to allow the threads to be formed properly. And though they don't show a jam nut on the underside against the purlin, it would probably be a good idea to use one.
http://www.ejot.com/ejot.de/Der_EJOT_Solarbefestiger_ist_keine_Stockschraube_Bau_2011--5816,websiteLang__en.htm Jim Duncan North Texas Renewable Energy NABCEP Certified Solar PV Installer No.31310-57 TECL 27398 nt...@1scom.net 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
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