<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">That would be great if it were possible! I'm not sure how you bottom mount a flush mount array. For a brief period many years ago, I was building solar trailers. I would bottom mount 4-6 panel arrays on rails in my warehouse and then hoist them up and through-bolt the whole array on the top of a trailer. I wasn't about to allow a trailer going 80 mph on the interstate to have panels mounted on the roof with mid-clamps! I had no idea what I was doing, but I had enough sense to know that would have been a bad idea!</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">I did provide feedback to IronRidge regarding a handful of failures from Hurricane Ian, but most of the issues we saw were most likely related to catastrophic module failure. After all, they are only tested to 5600 Pa uplift for even the best options we have on the market and 2400 Pa for some (which I refuse to use). The mid-clamp T-bolts tearing out of the rail are slightly concerning, but this was pretty rare, and honestly it could be related to installation torque issues, misalignment, or coupled with module failure. There was no widespread or definitive reason for rail failures at the clamp locations.</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">I would suggest that FEMA's recommendation is overkill and not based on much science, but conclusions based on anecdotal information without statistical data. It should be scrutinized. I think it would be a good idea to consider bottom mount for ground racks and tilt mounts that allow it, but it's just not practical or possible in the vast majority of residential installation cases. On that note, I am not aware of any ground mount failures around here from Hurricane Ian except for submerged arrays that were washed away from storm surge (Yikes!). And the handful of failures that we observed were a drop in the bucket relative to the installed numbers here.</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">One other thing. Wind direction, upwind obstructions/windbreaks, and luck have a huge amount to do with failures (of both PV and roofs themselves). These storms pick winners and losers. You will have ten houses in a row with pool enclosures mangled, and one in the middle that is unscathed. It's crazy to see. We have lots of gated communities with houses close together. When wind accelerates between houses, it can topple air conditioning units and pool equipment. If you look hard enough at where the wind was coming from and the surrounding area, you can really see how there are so many factors that come into play.</div><div><div dir="ltr" class="gmail_signature"><div dir="ltr"><br>Jason Szumlanski<div><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Principal Solar Designer | Florida Solar Design Group</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px"><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">NABCEP Certified Solar Professional (PVIP)</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px"><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Florida State Certified Solar Contractor CVC56956</span></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Mar 30, 2023 at 7:35 AM Christopher Warfel via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.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>
<p><font size="4">If you look at FEMA's design guide for solar
installations in FL and the Caribbean, the recommended module to
rail attachment method is back to using the attachment holes in
the solar module. Chris</font><br>
</p>
<div>On 3/30/2023 5:56 AM, Jason Szumlanski
via RE-wrenches wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div dir="ltr">
<div style="font-family:arial,helvetica,sans-serif">This thread
has morphed into more than it started as, and for good
reason. I want to provide some practical/anecdotal
information, having just gone through arguably the most
catastrophic wind event in Florida's history (Ian) since the
boom in solar energy started, and another major wind event
(Irrma) just 5 years ago.</div>
<div style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div style="font-family:arial,helvetica,sans-serif">First, Aside
from the Sunmodo and Quickbolt decking-only products, I
would check out IronRidge's new entrant into the market, the
IronRidge HUG. If you can't find info on it, ask your
distributor or IronRidge sales rep. They have data on truss
attachments and also missed truss installation procedures.
It's a unique approach to a dual-purpose product, and they
did a stellar job on the engineering documentation in my
opinion.</div>
<div style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div style="font-family:arial,helvetica,sans-serif">Ok, now let's
get to my most important point. Due to Hurricane Ian, the
number of roofing PV attachments that I have witnessed that
failed due to fastener pull-out (mine or competitors):</div>
<div style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div style="font-family:arial,helvetica,sans-serif">ZERO</div>
<div style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div style="font-family:arial,helvetica,sans-serif">The only
building where we had any mounts fail was on a flat roof
with pitched panels and Anchor Products mounts on TPO
membrane, but the mounts themselves did not cause the
failure. The roofing system itself failed, causing a small
section of the PV system to fail. But even in that case, the
following applies...</div>
<div style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div style="font-family:arial,helvetica,sans-serif">The weak
point in a well-designed and installed system is not the
fastener or flashing system. The module to rail connection
is where we saw failures. These failures fell into a few
categories:</div>
<div style="font-family:arial,helvetica,sans-serif">
<ul>
<li>Windborne debris struck panel, panel frame failed,
panel popped out of mid-clamps.</li>
<li>Catastrophic wind forces popped panels out of
mid-clamps (a good percentage of panels found INTACT and
still functional on the ground!) I suspect the panels
became covex in the wind, bending frames inward.</li>
<li>Windborne debris struck mounting system components,
panel dislodged, often still on the roof suspended by DC
leads.</li>
<li>Mid-clamp t-bolt tore out of aluminum rail channel
(IronRidge UFO, Unirac SM).</li>
<li>Mid-clamp sheared off (Quick Mount QRail).</li>
<li>Unexplained module detachment failures.</li>
</ul>
</div>
<div style="font-family:arial,helvetica,sans-serif">On 9/28/22,
while I stayed up all night bracing myself against my front
door that I thought was about to fail, I was imagining how
many roof leaks my clients were about to endure, and
wondered about the efficacy of my business going forward.
Those fears never materialized. Aside from a handful of
minor panel dislodgements, there was no panic following the
storm (with respect to solar panels). The bigger problem
became all of the people needing to remove panels for roof
replacements, but PV panels largely protected roofs in the
areas where they were installed. Sadly, the rest of the roof
often did not fare as well.</div>
<div style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div style="font-family:arial,helvetica,sans-serif">Anyway, back
to the decking attachments. I have been skeptical of
non-flashed products for comp shingle roofs for a long time.
My thinking is coming around, particularly with the HUG (I
trust IronRidge's testing regime). And sealants have come so
far. This method will remain up for debate probably for a
long time. Around here, I am pretty certain these products
will outlast the shingles they are placed upon. We only get
15 years out of most shingle roofs around here.</div>
<div style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div style="font-family:arial,helvetica,sans-serif">About
the pull-out fears... Mine are gone. We have done many flat
roofs with long fasteners through steel decking or wood
decking. These screws are usually something like #15 XHD
screws in lengths from 5 - 12". Not a single failure. We
have also used Quick Mount QBase Low-Slope bases on pitched
tile roofs that were only screwed into decking with 4
fasteners each (due to horizontal truss transitions) in some
cases. Zero failures. But the most relevant attachments I
can think of that are germane to this discussion are the
many thousands of S-5 SolarFoot that we have screwed into
decking on 5V metal roofs around here. These have four
screws per attachment, and S-5 load tests show something
like 240 lbs of pull-out strength in OSB (adjusted for
safety factor). When engineered for our wind loads, we
usually get anywhere from 36-48 inch attachment spacing,
sometimes 24 inches in certain roof zones. Again, not a
single failure.</div>
<div style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div style="font-family:arial,helvetica,sans-serif">I have more
solar installations on Sanibel Island and Fort Myers Beach
(Hurricane Ian Ground zero) than anyone. Many of those have
decking-only attachments, S-5 clamps, flat roofs, or other
attachments other than trusses. I can tell you unequivocally
that I trust decking-only attachments from a pull-out
strength standpoint. When properly engineered, with cautious
attachment spacing, these mounts work in both OSB and
plywood. Because of the inconsistencies in OSB, we always
err on the side of caution, if not in the engineering, then
in the installation, by installing more attachments than
prescribed. But the evidence is clear. It works.</div>
<div style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div style="font-family:arial,helvetica,sans-serif">Caveat to the
above: I have zero experience with snow or seismic, and no
experience on roofs exceeding 8:12 pitch, and few above
6:12. </div>
<div style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div style="font-family:arial,helvetica,sans-serif">And one more
shout-out to S-5 clamps on standing seam roofs. Aside from
one minor failure of the roof metal itself, not an S-5
failure, we had zero failures of S-5 clamps attachments to
report.</div>
<div style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div>
<div dir="ltr">
<div dir="ltr">
<div style="font-family:arial,helvetica,sans-serif">I hope
this anecdotal information helps and sets some fears
aside. Please reach out to me off-list if you want any
specifics or details about our experience with
catastrophic wind events.</div>
<br>
</div>
<div dir="ltr">
<div style="font-family:arial,helvetica,sans-serif">Sincerely,</div>
</div>
<div dir="ltr"><br>
Jason Szumlanski
<div><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Principal
Solar Designer | Florida Solar Design Group</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">
<span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">NABCEP
Certified Solar Professional (PVIP)</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">
<span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Florida
State Certified Solar Contractor CVC56956</span></div>
</div>
</div>
</div>
<br>
</div>
<br>
<img alt="" style="display: flex;" src="https://mailtrack.io/trace/mail/3fe2b3d4fd55f6aa5564b2f98c8384dac44a3b1e.png?u=1613865" width="0" height="0">
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Thu, Mar 30, 2023 at
2:47 AM William Miller via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.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>
<div lang="EN-US">
<div>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)">Friends:</span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"> </span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)">Thanks
for bringing up this scenario. </span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"> </span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)">I
have two problems with using a product such as the
easy-feet or other deck-fastened brackets,
particularly on a rigid foam-above-sheeting roof:</span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"> </span></p>
<p style="margin-bottom:12pt"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"><span>1.<span style="font:7pt "Times New Roman"">
</span></span></span><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)">I
worry about compression of the foam material over
time. This could leave a void under the bracket
which could lead to leaks or wobbly brackets.</span></p>
<p style="margin-bottom:12pt"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"><span>2.<span style="font:7pt "Times New Roman"">
</span></span></span><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)">I
don’t believe in chemical solutions for
sloped-roof rain-proofing. By that I mean the use
of caulks, gaskets, etc. Since roofs were first
thatched, the overriding wisdom is that gravity is
the only way to reliably shed water. Overlapping,
seamless material is the only method to use.
Caulks degrade, roof surfaces become powdery, and
the rafter is often under an architectural feature
or seam in the shingles.</span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)">I
researched the PLP EZ foot back when the company
was DPW. The fasteners provided were not rated
for the application, according to the fastener
manufacturer. If you can match the fasteners to
the decking and the forces, then maybe you have a
start to a mounting solution.</span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"> </span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)">Whatever
product you use, I would install it on a section
of flashing metal, lapped under the next course
up. The flashing gives a flat, seamless surface
to caulk or gasket to. The thicker and wider the
flashing, the more you distribute the downward
force </span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)">applied
to the bracket by weight and fasteners. Any voids
under the bracket will have an overlapped flashing
above it.</span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"> </span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)">I
hope these musings help you find a solution.</span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"> </span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)">William
Miller</span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"> </span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)">PS:
I have encountered this roof configuration a few
times on flat, <a href="https://homeinspectioninsider.com/built-up-roofing/" target="_blank">built-up
roofing (BUR</a>). We have dealt with it by
cutting through the foam, installing blocking on
top of the sheeting and having a roofer feather
the blocks into the roofing with <a href="https://www.blueridgefiberboard.com/cant-strip-tapered-edge-smoothes-roof-drainage-slope/" target="_blank">cant
strips</a>. A pitched roof is a different
situation, however.</span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"> </span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)">Wm</span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"> </span></p>
<p class="MsoNormal"><span style="font-family:Arial,"sans-serif";color:rgb(31,73,125)">Miller
Solar</span></p>
<p class="MsoNormal"><span style="font-family:Arial,"sans-serif";color:rgb(31,73,125)">17395
Oak Road, Atascadero, CA 93422</span></p>
<p class="MsoNormal"><span style="font-family:Arial,"sans-serif";color:rgb(31,73,125)">805-438-5600</span></p>
<p class="MsoNormal"><span style="font-family:Arial,"sans-serif";color:rgb(31,73,125)"><a href="http://www.millersolar.com/" target="_blank"><span style="color:blue">www.millersolar.com</span></a></span></p>
<p class="MsoNormal"><span style="font-family:Arial,"sans-serif";color:rgb(31,73,125)">CA
Lic. 773985</span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,"sans-serif";color:rgb(31,73,125)"> </span></p>
<p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"> </span></p>
<p class="MsoNormal"><b><span style="font-size:10pt;font-family:Tahoma,"sans-serif"">From:</span></b><span style="font-size:10pt;font-family:Tahoma,"sans-serif"">
RE-wrenches [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>]
<b>On Behalf Of </b>August Goers via RE-wrenches<br>
<b>Sent:</b> Wednesday, March 29, 2023 11:47 AM<br>
<b>To:</b> RE-wrenches<br>
<b>Cc:</b> August Goers<br>
<b>Subject:</b> Re: [RE-wrenches] Attaching Array
To or Through Ply</span></p>
<p class="MsoNormal"> </p>
<div>
<p class="MsoNormal">We've found that in the Bay
Area that deck-mount solutions typically pencil
out structurally (via a structural professional
engineer) as long as the deck is 1/2" plywood or
thicker, assuming we have all the info on how the
roof is constructed. The big assumption is that we
can get all that roof construction info, which can
be difficult for existing structures.</p>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">We haven't taken the plunge
yet on the flahingless deck mount products like
the Sunmodo Nanomount or Unirac Flashloc Duo. I
do think that they offer several significant
advantages including not needing to find
rafters, thus virtually eliminating missed pilot
holes, and not disturbing the comp shingle by
eliminating prying up the courses to insert the
flashing. </p>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">August</p>
</div>
<div>
<p class="MsoNormal">Luminalt</p>
</div>
</div>
</div>
<p class="MsoNormal"> </p>
<div>
<div>
<p class="MsoNormal">On Wed, Mar 29, 2023 at
11:34 AM Solar Energy Solutions via RE-wrenches
<<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>>
wrote:</p>
</div>
<blockquote style="border-top:none;border-right:none;border-bottom:none;border-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<p class="MsoNormal">We like Spider Rax… with
the flashing!</p>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<div>
<div>
<table style="width:225pt;background:rgb(233,233,235);border-collapse:collapse" width="525" cellspacing="0" cellpadding="0" border="0">
<tbody>
<tr>
<td style="padding:0in">
<table style="width:128.55pt;background:rgb(233,233,235)" width="300" cellspacing="0" cellpadding="0" border="0">
<tbody>
<tr>
<td style="padding:6pt 0in">
<div style="margin-left:12pt;margin-right:12pt;max-width:100%;overflow:hidden">
<p class="MsoNormal"><b><span style="font-size:9pt;font-family:Helvetica,"sans-serif""><a href="https://spiderrax.com/" target="_blank"><span style="color:black;text-decoration:none">Spider-Rax
PV Solar
Mounting</span></a></span></b></p>
<p class="MsoNormal"><b><span style="font-size:8.5pt;font-family:Helvetica,"sans-serif""><a href="https://spiderrax.com/" target="_blank"><span style="color:rgb(162,162,169);text-decoration:none">spiderrax.com</span></a></span></b></p>
</div>
</td>
<td style="width:15.45pt;padding:0in 9pt 0in 0in" width="36">
<p class="MsoNormal"><span style="font-family:Helvetica,"sans-serif""><a href="https://spiderrax.com/" target="_blank"><span style="text-decoration:none"><b>Error! Filename not specified.</b></span></a></span></p>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<p class="MsoNormal" style="margin-bottom:12pt"> </p>
<div>
<div>
<div>
<div id="m_-7827179430652818356m_6716844740238566097m_3963197914649838960yiv6213109167yui_3_13_0_rc_1_1_1382394418853_23166">
<p class="MsoNormal"><b>Andrew
Koyaanisqatsi</b></p>
</div>
<div id="m_-7827179430652818356m_6716844740238566097m_3963197914649838960yiv6213109167yui_3_13_0_rc_1_1_1382394418853_23122">
<p class="MsoNormal">President</p>
</div>
<div id="m_-7827179430652818356m_6716844740238566097m_3963197914649838960yiv6213109167yui_3_13_0_rc_1_1_1382394418853_23169">
<p class="MsoNormal"><b>Solar Energy
Solutions, Inc.<br>
<i id="m_-7827179430652818356m_6716844740238566097m_3963197914649838960yui_3_16_0_ym19_1_1471541494300_7793">The
BRIGHT CHOICE</i></b></p>
</div>
<div id="m_-7827179430652818356m_6716844740238566097m_3963197914649838960yiv6213109167yui_3_13_0_rc_1_1_1382394418853_23169">
<p class="MsoNormal"> </p>
</div>
<div id="m_-7827179430652818356m_6716844740238566097m_3963197914649838960yiv6213109167yui_3_13_0_rc_1_1_1382394418853_23174">
<p class="MsoNormal"><b>Since
1987, helping you and your </b></p>
</div>
<div id="m_-7827179430652818356m_6716844740238566097m_3963197914649838960yiv6213109167yui_3_13_0_rc_1_1_1382394418853_23174">
<p class="MsoNormal"><b>Portland
neighbors move towards an
environmentally sustainable
future.</b></p>
</div>
<div id="m_-7827179430652818356m_6716844740238566097m_3963197914649838960yiv6213109167yui_3_13_0_rc_1_1_1382394418853_23174">
<p class="MsoNormal"> </p>
</div>
<div id="m_-7827179430652818356m_6716844740238566097m_3963197914649838960yiv6213109167yui_3_13_0_rc_1_1_1382394418853_23177">
<p class="MsoNormal"><b><a href="tel:503-238-4502" target="_blank">503-238-4502</a><br>
<a href="http://www.solarenergyoregon.com/" id="m_-7827179430652818356m_6716844740238566097m_3963197914649838960yiv6213109167yui_3_16_0_1_1418769668206_5441" target="_blank">www.SolarEnergyOregon.com</a></b></p>
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<div>
<p class="MsoNormal"><br>
<br>
</p>
<p class="MsoNormal" style="margin-bottom:12pt">On Mar 29,
2023, at 11:04 AM, Jerry Shafer via
RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>>
wrote:</p>
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<blockquote style="margin-top:5pt;margin-bottom:5pt">
<div>
<p class="MsoNormal"><span style="font-family:Tahoma,"sans-serif""></span></p>
<div>
<p class="MsoNormal">Wrenches</p>
<div>
<p class="MsoNormal">Sounds like a
SIP's type product, there are quite
a few multi hole attachment bases
that are designed for SIP's. Most
will have a larger base, lots of
holes for screws to attach that do
not require rafters underneath to
attach.</p>
</div>
<div>
<p class="MsoNormal">Fun times</p>
</div>
</div>
<p class="MsoNormal"> </p>
<div>
<div>
<p class="MsoNormal">On Wed, Mar 29,
2023, 8:30 AM frenergy via
RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>>
wrote:</p>
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<div>
<p>Matt,</p>
<p> I guess my questions
are 1/2" plywood or 5/8" and how
thick is the foam? Oh and I
assume its nominal 2X6 T&G?
Do you know how the plywood is
attached?.....through the foam
into the T&G?... to stringers,
nailers or whatever they're
called?</p>
<p>Bill</p>
<pre>Feather River Solar Electric </pre>
<pre>Bill Battagin, Owner</pre>
<pre>4291 Nelson St.(shipping) </pre>
<pre>5575 Genesee Rd. (USPS, UPS)</pre>
<pre>Taylorsville, CA 95983</pre>
<pre>530.284.1925 Office/ 530.258.1641 Cell</pre>
<pre>CA Lic 874049</pre>
<pre>Solar powered since 1982</pre>
<div>
<p class="MsoNormal">On 3/29/2023
7:53 AM, Dave Tedeyan via
RE-wrenches wrote:</p>
</div>
<blockquote style="margin-top:5pt;margin-bottom:5pt">
<div>
<p class="MsoNormal">Hi Matt, </p>
<div>
<p class="MsoNormal">I've used
these in the past when on a
comp roof and there was no
good way to get into the
rafters (or TJI's in this
case)</p>
</div>
<div>
<p class="MsoNormal"><a href="https://sunmodo.com/nanomount/" target="_blank">https://sunmodo.com/nanomount/</a></p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">You might
want to replace the screws
with something shorter and
beefier though to get more
grip if you are only going
into 1/2" plywood.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Cheers,</p>
</div>
<div>
<p class="MsoNormal">Dave</p>
</div>
</div>
<p class="MsoNormal"> </p>
<div>
<div>
<p class="MsoNormal">On Wed,
Mar 29, 2023 at 10:38 AM
Matt Sherald via RE-wrenches
<<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>>
wrote:</p>
</div>
<blockquote style="border-top:none;border-right:none;border-bottom:none;border-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<p class="MsoNormal">Hi
All,</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">I've
run into a roof-mounted
job where the roof is
built-up with the
following:</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Comp
shingle</p>
</div>
<div>
<p class="MsoNormal">Plywood</p>
</div>
<div>
<p class="MsoNormal">Foam
board</p>
</div>
<div>
<p class="MsoNormal">T&G
(roof deck, but also
interior ceiling)</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">The
beams that hold the
t&g up are
wide-spaced and not
convenient for fastening
the full extent of the
array. </p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">This
being the case, I was
considering other
fastening options and am
writing to pick the
collective brain of the
Wrenches to see how
others have addressed
similar situations.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">One
thought I had was to use
the PLP Easy Mounting
Foot and I'd be glad for
any opinions on that or
another solution. </p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">-Matt</p>
</div>
<div>
<p class="MsoNormal"><br>
-- </p>
<div>
<div>
<div>
<div>
<div>
<p class="MsoNormal">Matt
Sherald</p>
</div>
<p class="MsoNormal">PIMBY
Energy, LLC</p>
</div>
<div>
<p class="MsoNormal">304-704-5943</p>
</div>
<p class="MsoNormal"> </p>
</div>
<p class="MsoNormal"> </p>
</div>
</div>
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<p class="MsoNormal" style="margin-bottom:12pt"><br></p></blockquote></div></blockquote></div></blockquote></div><p class="MsoNormal" style="margin-bottom:12pt"><br></p>
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</blockquote>
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<p class="MsoNormal" style="margin-bottom:12pt">_______________________________________________<br>
List sponsored by Redwood Alliance<br></p></blockquote></div></div></div><br>
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<br>
<fieldset></fieldset>
<pre>_______________________________________________
</pre>
</blockquote>
<div>-- <br>
<div>
<div>
<div>
<div>
<div>
<font face="PMingLiU-ExtB">
Christopher Warfel</font><br>
<font face="PMingLiU-ExtB"> ENTECH
Engineering, Inc.</font><br>
<font face="PMingLiU-ExtB">PO Box 871, Block Island, RI
02807</font><br>
<font face="PMingLiU-ExtB">
401-466-8978</font><br>
<font face="PMingLiU-ExtB"><a href="http://entech-engineering.com" target="_blank"><img src="cid:187348b131e1e56e431" alt="" width="274" height="121" border="0"></a><br>
</font><br></div></div></div></div></div></div></div>
</blockquote></div></div>