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<DIV><SPAN class=234130415-22032011><FONT face=Arial>Holt, the rule of thumb is
equal parts pipe above and below ground. In your case you might want to consider
a large belled 36" diameter concreate pier with a ring of oversized anchor
bolts. The pole bottom would need a large flange with very robust
gussets. Extend that </FONT></SPAN><SPAN class=234130415-22032011><FONT
face=Arial>larger base, 6-8 feet up and scaled down to a smaller diameter pole
to the top. You'll want to do the complete assembly and wiring before lifting
into place with a crane. Kind of like a mono-pole wind turbine.
</FONT></SPAN></DIV>
<DIV><SPAN class=234130415-22032011><FONT face=Arial>We've built trackers
of ~125 sq ft PV area in high-wind locations and mounted them on Wattsun
AZ-225 dual axis tracker drives. The 225 is designed for up to 225 sq ft of PVso
the system has very little movement from the undersized array even in high winds
like today. </FONT></SPAN></DIV>
<DIV><SPAN class=234130415-22032011><FONT face=Arial>You'll get some pretty
scary movement at that height regardless of the pipe size. </FONT></SPAN></DIV>
<DIV><SPAN class=234130415-22032011><FONT face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=234130415-22032011><FONT face=Arial><SPAN
class=234130415-22032011>
<DIV><FONT size=2><FONT face=Arial><STRONG>Jim
Duncan</STRONG></FONT></FONT></DIV>
<DIV><FONT face=Arial size=2><STRONG>North Texas Renewable
Energy</STRONG></FONT></DIV>
<DIV>
<DIV>
<DIV><FONT face=Arial size=2><STRONG>NABCEP Certified Solar
PV</STRONG></FONT></DIV>
<DIV><FONT face=Arial size=2><STRONG>Installer
No.031310-57</STRONG></FONT></DIV>
<DIV><FONT face=Arial size=2><STRONG>TECL
27398</STRONG></FONT></DIV></DIV></DIV>
<DIV><A href="mailto:ntrei@1scom.net"><FONT face=Arial
size=2><STRONG>ntrei@1scom.net</STRONG></FONT></A><FONT face=Arial
size=2><STRONG> </STRONG></FONT></DIV>
<DIV><FONT face=Arial size=2><STRONG>817.917.0527</STRONG></FONT></DIV>
<DIV><A href="http://www.ntrei.com/"><FONT face=Arial
size=2><STRONG>www.ntrei.com</STRONG></FONT></A></DIV>
<DIV><FONT face=Arial size=2><STRONG></STRONG></FONT> </DIV></SPAN></DIV>
<DIV><SPAN class=234130415-22032011></SPAN> </DIV></FONT></SPAN>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org]<B>On Behalf Of
</B>holtek@sbcglobal.net<BR><B>Sent:</B> Tuesday, March 22, 2011 8:13
AM<BR><B>To:</B> RE-wrenches<BR><B>Subject:</B> [RE-wrenches] Tall pole
mount<BR><BR></FONT></DIV>
<DIV>Situation: Client has limited locations for array due to trees.
There is one spot that would work IF pole mount is 20-25' (that would put the
array top edge at 30'+). Will need to incorporate tracker to maximize
production. Will definitely be consulting structural engineer.</DIV>
<DIV> </DIV>
<DIV>Questions: Anyone tried this? Comments or lessons learned?</DIV>
<DIV> </DIV>
<DIV>Holt E. Kelly<BR>Holtek Fireplace & Solar Products<BR>500 Jewell
Dr.<BR>Waco TX. 76712<BR>254-751-9111<BR><A
href="http://www.holteksolar.com">www.holteksolar.com</A><BR></DIV>
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