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<DIV dir=ltr align=left><SPAN class=937105321-21042011><FONT color=#0000ff
size=2 face=Arial>Generally, in order to develope the full tensil strength of
the bolt, it should be engaged by a minimum of 5 threads.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=937105321-21042011></SPAN> <BR><SPAN
lang=en-us><FONT size=2 face=Arial>Mark Frye</FONT></SPAN> <BR><SPAN
lang=en-us><FONT size=2 face=Arial>Berkeley Solar Electric Systems</FONT></SPAN>
<BR><SPAN lang=en-us><FONT size=2 face=Arial>303 Redbud Way</FONT></SPAN>
<BR><SPAN lang=en-us><FONT size=2 face=Arial>Nevada City, CA
95959</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2 face=Arial>(530)
401-8024</FONT></SPAN> <BR><SPAN lang=en-us></SPAN><A
href="http://www.berkeleysolar.com/"><SPAN lang=en-us><U><FONT color=#0000ff
size=2 face=Arial>www.berkeleysolar.com</FONT></U></SPAN></A><SPAN
lang=en-us><FONT size=2 face=Arial> </FONT></SPAN> </DIV>
<DIV> </DIV><BR>
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<FONT size=2 face=Tahoma><B>From:</B> re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <B>On Behalf Of </B>North
Texas Renewable Energy Inc<BR><B>Sent:</B> Thursday, April 21, 2011 2:28
PM<BR><B>To:</B> RE Wrenches<BR><B>Subject:</B> [RE-wrenches] METAL ROOF
ATTACHMENT<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV><SPAN class=312590421-21042011></SPAN><SPAN class=312590421-21042011><FONT
face=Arial>Wrenches </FONT></SPAN></DIV>
<DIV><SPAN class=312590421-21042011><FONT face=Arial></FONT></SPAN><SPAN
class=312590421-21042011><FONT face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=312590421-21042011><FONT face=Arial>I'm proposing a PV array on
a metal building with L feet attached directly thru the roof into
the purlins. The plan is to use thread cutting SS bolts, a minimum of ¼-28
pitch. The metal is 14 ga and will engage over 2 full threads and
because the array is only 2 landscape modules on NS rails there will be 2
bolts for every module. 36 total. Im using a mag base drill press so the144
holes will be straight & round. </FONT></SPAN></DIV>
<DIV><SPAN class=312590421-21042011><FONT face=Arial>What surprises can I expect
or is there an easier way to go about this. Your 2¢ is welcome.
</FONT></SPAN></DIV>
<DIV><SPAN class=312590421-21042011><FONT face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=312590421-21042011>
<DIV><FONT size=2><FONT face=Arial><STRONG>Jim
Duncan</STRONG></FONT></FONT></DIV>
<DIV><FONT size=2 face=Arial><STRONG>North Texas Renewable
Energy</STRONG></FONT></DIV>
<DIV><FONT size=2 face=Arial><STRONG>486 W.N. Woody Road</STRONG></FONT></DIV>
<DIV><FONT size=2 face=Arial><STRONG>Azle Texas 76020</STRONG></FONT></DIV>
<DIV>
<DIV>
<DIV><FONT size=2 face=Arial><STRONG>NABCEP Certified Solar
PV</STRONG></FONT></DIV>
<DIV><FONT size=2 face=Arial><STRONG>Installer
No.031310-57</STRONG></FONT></DIV>
<DIV><FONT size=2 face=Arial><STRONG>TECL
27398</STRONG></FONT></DIV></DIV></DIV>
<DIV><A href="mailto:ntrei@1scom.net"><FONT size=2
face=Arial><STRONG>ntrei@1scom.net</STRONG></FONT></A><FONT size=2
face=Arial><STRONG> </STRONG></FONT></DIV>
<DIV><FONT size=2 face=Arial><STRONG>817.917.0527</STRONG></FONT></DIV>
<DIV><A href="http://www.ntrei.com/"><FONT size=2
face=Arial><STRONG>www.ntrei.com</STRONG></FONT></A></DIV>
<DIV><FONT size=2 face=Arial><STRONG></STRONG></FONT> </DIV><FONT
face=Arial></FONT></SPAN></DIV>
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