<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">I didn't have the opportunity to investigate it with any forensic/scientific methodology. The clamps could have been very close to the eave, spaced too far in the corner zones, cantilevers could have been excessive... it's hard to tell. But I was surprised by the failure mode as well. It did give me confidence that the S-5's would not separate from the seams at least. FWIW it was Unirac standard rail with SolarWorld 60-cell on a 3:12 pitch at about 25 feet height, right on the beach (170 mph ultimate design wind speed, Exp D). </div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Jason</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Oct 19, 2020 at 3:37 PM Will White <<a href="mailto:will@solarenergy.org">will@solarenergy.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">That's a really interesting failure mode. I would have thought the fasteners would have pulled out but I guess it makes sense that the metal ripped.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Oct 19, 2020 at 3:19 PM Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com" target="_blank">jason@floridasolardesigngroup.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div style="font-family:arial,helvetica,sans-serif"></div><div dir="ltr"><div style="font-family:arial,helvetica,sans-serif">I would say it was the metal itself. It was torn, so the clips that hold the metal to the roof held, at least long enough for the metal to tear. It is completely plausible that the point load was too high from too few clamps.</div><div><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><b><div style="text-align:center"><br></div></b></div></div></div></div></div></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Oct 19, 2020 at 8:16 AM Will White <<a href="mailto:will@solarenergy.org" target="_blank">will@solarenergy.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">It's interesting that you experienced this as I've always told customers that the roof will come off the building with the array attached before the array comes off the metal roof. Sounds like the issue was with the attachment (or lack of) between the roof and the building. <div><br></div><div>Thanks,</div><div>Will</div><div><br></div><div> -- <br><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><b style="font-size:12.8px">Will White</b><div style="font-size:12.8px">Curriculum Developer</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px"><span style="font-size:12.8px">e: </span><a href="mailto:will@solarenergy.org" style="font-size:12.8px" target="_blank">will@solarenergy.org</a><span style="font-size:12.8px"> </span><br></div><div><div style="font-size:12.8px"><span style="font-size:12.8px">w: <a href="http://www.solarenergy.org/" target="_blank">www.solarenergy.org</a> </span></div><div style="font-size:12.8px">p: 802-272-3092<br></div><div style="font-size:12.8px"><span style="font-size:12.8px"><br></span></div><div style="font-size:12.8px"><span style="font-size:12.8px"><div>NABCEP Certified PV Installation Professional</div><div># 093006-34</div></span></div><div><span style="color:rgb(102,102,102);font-family:Arial,sans-serif;font-size:x-small">Do you envision a world powered by renewable energy? </span><a href="http://solarenergy.org/donate" style="font-family:Arial,sans-serif;font-size:x-small" target="_blank">Be the change</a><span style="color:rgb(102,102,102);font-family:Arial,sans-serif;font-size:x-small">.</span></div></div></div></div></div></div></div></div></div></div></div></div></div></div><div><br></div><div><br></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Oct 18, 2020 at 5:41 PM Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com" target="_blank">jason@floridasolardesigngroup.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div style="font-family:arial,helvetica,sans-serif"></div><div dir="ltr"><div style="font-family:arial,helvetica,sans-serif">I would add that S-5s are only as good as the roof. We saw a large system (not ours) that ripped the metal right off the roof during Hurricane Irma. It literally tore the meta. The panels, rails, and S-5s were still connected, sitting on the ground with chunks of metal roofing still attached to the S-5s. It was quite the mangled mess. We salvaged quite a bit, but the client built a ground rack after this.</div><div style="font-family:arial,helvetica,sans-serif"><br></div><div style="font-family:arial,helvetica,sans-serif">To be fair, this was a totally exposed beachfront home. I don't know what the spacing was on the clamps, either.</div><div style="font-family:arial,helvetica,sans-serif"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Oct 18, 2020 at 12:00 PM Jerry Shafer <<a href="mailto:jerrysgarage01@gmail.com" target="_blank">jerrysgarage01@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto">Wrenches<div dir="auto">I think what you said is totally true,"its only as good as the instalation" but here is where l differ, S-5's if installed correctly are no different than anything else installed on the roof.</div><div dir="auto">Jerry</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Oct 18, 2020, 8:42 AM Dave Angelini Offgrid Solar <<a href="mailto:offgridsolar@sti.net" target="_blank">offgridsolar@sti.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><p>The S5 is only as good as the installer. I have seen them come off with a string of panels on an insurance inspection I did.</p>
<p>I billed them and made another note in my journal of why the only thing that should go on a metal roof is rainwater.</p>
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<pre><strong><span style="font-size:small">Dave Angelini Offgrid Solar
"we go where powerlines don't"
<a href="http://members.sti.net/offgridsolar/" rel="noreferrer" target="_blank">http://members.sti.net/offgridsolar/</a>
e-mail <a href="mailto:offgridsolar@sti.net" rel="noreferrer" target="_blank">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
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<p>On Sat, 17 Oct 2020 21:37:07 -0400, Hilton Dier III <<a href="mailto:hiltondier@gmail.com" rel="noreferrer" target="_blank">hiltondier@gmail.com</a>> wrote:</p>
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<p><span style="font-family:"Times New Roman",Times,serif">I'm with Jerry Shafer on this one. S-5 clamps with rails work well without punching holes in the metal roof. If the roof is fastened well to beefy steel C channel it should be fine. The S-5 clamps themselves are stronger than the roofing.</span></p>
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Hilton Dier III
Missisquoi River Hydro
Renewable Energy Design
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