Chad I second August. We have had great success with self tapping screws. Put some butyl on the L-foot and set it in.
thx peter ----- Original Message ----- From: August Goers To: RE-wrenches Sent: Monday, June 06, 2016 6:44 PM Subject: Re: [RE-wrenches] Steel Trusses Hi Chad, We’ve occasionally installed onto steel trusses with either self drilling screws (no pilot required) or thread forming screws (pilot hole required). See attached sample spec sheets. I suppose you could install a standard tile hook type product with the types of fasters I listed above. Or, hire a roofer to waterproof your stanchions and reinstall the removed tiles. More and more, we are moving towards the latter because we’ve bumped into issues with degrading underlayment (felt paper) under tile roofs. Best, August Luminalt From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Chad Waits Sent: Monday, June 06, 2016 3:15 PM To: RE-wrenches Subject: [RE-wrenches] Steel Trusses Wrenches, Anyone out there have any experience attaching arrays (from the topside) to roofs with steel trusses under plywood decking? We’ve got a new project that has steel trusses and we would prefer to not have to spend time in the attic bolting through (it was 113 degrees here today)… Is there a fastening system out there that anyone has experience with? Oh, the roof is composite/strengthened clay tile as well. Thanks! Chad Waits President/Owner – Net Zero Solar 101 W. 5th St., Tucson, AZ 85705 Office: 520-207-4053 Cell: 520-270-4873 NABCEP Certified PV Installation Professional NABCEP Certified Solar Heating Installer ------------------------------------------------------------------------------ _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
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