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<DIV><FONT face=Arial>Allan</FONT></DIV>
<DIV><FONT face=Arial>not a specific solution to your design issue but something
to consider.</FONT></DIV>
<DIV><FONT face=Arial>I needed 6 pieces of aluminum to cover the narrow
gaps between 2 PV modules on a skylight array installation. I stopped at a mfgr
of custom skylights and windows and asked to search their cutoff/scrap bin.
I found exactly the "T" configuration of aluminum extrusion I needed
and paid the owner wholesale, plus he cut 'em to length free.
</FONT></DIV>
<DIV><FONT face=Arial>They had dozens of styles and shapes though many were
short pieces, I found just the thing.</FONT></DIV>
<DIV><FONT face=Arial>the end</FONT></DIV>
<DIV><FONT face=Arial>Jim Duncan<BR>North Texas Renewable Energy
Inc<BR>817.917.0527<BR><A
href="mailto:ntrei@earthlink.net">ntrei@earthlink.net</A><BR><A
href="http://www.ntrei.com">www.ntrei.com</A> </FONT></DIV>
<DIV>
<HR>
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<DIV><FONT face=Arial></FONT> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=allan@positiveenergysolar.com
href="mailto:allan@positiveenergysolar.com">Allan Sindelar</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=re-wrenches@lists.re-wrenches.org
href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, March 27, 2009 1:01
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [RE-wrenches] Hardware
request</DIV>
<DIV><BR></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Wrenches,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">We have an unusual roof
application. It’s for a roof-mount array on a commuter rail station canopy in
<st1:City w:st="on"><st1:place w:st="on">Santa Fe</st1:place></st1:City>. The
roof is made up of a coated corrugated steel top layer, in the shape of a
series of sine waves, over roofing felt, 5/8” plywood sheathing, and a
corrugated metal base called Epicore. The array will be one long single row of
modules in portrait mode on Solarmount rails. I’m leaving out some details in
order to get to the point. <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">We intend to base our mounting of
the rails on a through-bolt mounting attachment, using threaded rod with the
necessary nuts, washers, and sealant layers to create a compressed sandwich
approach. The corrugated top layer has peaks and troughs of about 1˝” radius.
We’ll use L-feet to mount the module rails to the through-bolts, which will
likely be made from 5/16” or 3/8” threaded rod (size to be determined as we
work out the details at the site). We will drill through the troughs of the
corrugations, rather than the peaks, to avoid compressing the corrugated
roofing; drilling the troughs has the project engineer’s
approval.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">What we need is something like
half-round anodized aluminum or powder-coated steel stock material. The idea
is that the convex round profile fills the corrugated trough, and the flat
surface forms a base for the L-foot. We would expect to cut the stock to
lengths, say 4-6”, drill one hole through the center cross-section for our
through-bolt, and mount the sections in the troughs, one at each through-bolt
location.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">What product, likely used in some
other industry or manufacturing process, would work for our half-round stock?
The job isn’t big enough to justify a custom extrusion – we probably need two
dozen of the finished pieces.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Thank you for any
ideas,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Allan Sindelar, Positive
Energy<o:p></o:p></SPAN></FONT></P></DIV>
<P>
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