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<DIV><FONT color=#008000 size=4>Our first tracker job was for Y2K here in
central Va. --a lot of red clay soils, especially down 3'+. The client had been
in the 8' Satellite dish business. He suggested using his backhoe to dig a
' chicken foot' foundation--3 horizontal footings, as deep and as
long as you want. This leaves a central space ,where the
footings merge, for the 8-10 " , schedule 40 or 80 pipe. We typically make
the feet 4' -5'deep--especially at the bottom of the pole-- and 6' long and
12 " wide, with plenty of rebar circling the pipe and extending into the feet,
at 1' increments of depth. Rebar is cheap so use plenty of it, and use a
3-4000 psi concrete , as dry as possible.</FONT></DIV>
<DIV><FONT color=#008000 size=4>The windiest location has probably taken 70-100
mph gusts--enough to take the roof off the nearby farm building, and necesitate
the elevation actuator to need upgrading-- but the foundation is
unmoved.</FONT></DIV>
<DIV><FONT color=#008000 size=4></FONT> </DIV>
<DIV><FONT color=#008000 size=4>One little trick is to get your own 6" box beam
--less expensive than shipped from Wattsun-- and make it a little longer than
typical in order to allow a 2" space between modules to relieve the air
pressure. We also like to have the manual control so the array can be set flat,
although that was not activated by the owner during the last several wind
events. Hence the need to upgrade the elevation actuator---------</FONT></DIV>
<DIV><FONT color=#008000 size=4></FONT> </DIV>
<DIV><FONT color=#008000 size=4>Never had it engineered tho, so use your own
judgement.</FONT></DIV>
<DIV><FONT color=#008000 size=4></FONT> </DIV>
<DIV><FONT color=#008000 size=4>Ken</FONT></DIV>
<DIV><FONT color=#008000 size=4>CommonWealth Solar</FONT></DIV>
<DIV><FONT color=#008000 size=4>Ashland , Va</FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #008000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message -----</DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=ntrei@1scom.net href="mailto:ntrei@1scom.net">Solarguy</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'</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, October 27, 2012 10:19
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [RE-wrenches] Wattsun
Tracker Foundations</DIV>
<DIV><BR></DIV>
<DIV class=WordSection1>
<P class=MsoNormal><SPAN style="COLOR: #1f497d; FONT-SIZE: 11pt">We’ve
installed a number of AZ225s and big Zomeworks trackers to date. There are a
number of companies that do foundation pier drilling but only a handful that
have the capacity for a 36” pier. Even fewer will drill thru rock if it’s down
there. <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN style="COLOR: #1f497d; FONT-SIZE: 11pt">Water must be
pumped out when it starts to collect and dealing with that pita is something
to take up in advance with the cement contractor. <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="COLOR: #1f497d; FONT-SIZE: 11pt"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Cambria','serif'; COLOR: #1f497d; FONT-SIZE: 11pt">Jim
Duncan<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Cambria','serif'; COLOR: #1f497d; FONT-SIZE: 11pt">North
Texas Renewable Energy Inc<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Cambria','serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><A
href="http://www.ntrei.com/"><SPAN
style="COLOR: blue">www.ntrei.com</SPAN></A> <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Cambria','serif'; COLOR: #1f497d; FONT-SIZE: 11pt">NABCEP
PV 031310-57<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Cambria','serif'; COLOR: #1f497d; FONT-SIZE: 11pt">TECL-27398<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Cambria','serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><A
href="mailto:ntrei@1scom.net"><SPAN
style="COLOR: blue">ntrei@1scom.net</SPAN></A> <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Cambria','serif'; COLOR: #1f497d; FONT-SIZE: 11pt">817.917.0527<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="COLOR: #1f497d; FONT-SIZE: 11pt"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="COLOR: #1f497d; FONT-SIZE: 11pt"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="COLOR: #1f497d; FONT-SIZE: 11pt"><o:p> </o:p></SPAN></P>
<DIV>
<DIV
style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<P class=MsoNormal><B><SPAN
style="FONT-FAMILY: 'Tahoma','sans-serif'; FONT-SIZE: 10pt">From:</SPAN></B><SPAN
style="FONT-FAMILY: 'Tahoma','sans-serif'; FONT-SIZE: 10pt">
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <B>On Behalf Of </B>Ryan
Harkins<BR><B>Sent:</B> Friday, October 26, 2012 2:36 PM<BR><B>To:</B>
RE-wrenches<BR><B>Subject:</B> [RE-wrenches] Wattsun Tracker
Foundations<o:p></o:p></SPAN></P></DIV></DIV>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Hey Wrenches,<o:p></o:p></P>
<DIV>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<DIV>
<P class=MsoNormal>I planning some AZ-225 tracker installs, and I would like
to avoid full excavation for slab/pier type and opt for the drilled pier
option. The pier is supposed to be 30-36" diameter and 9.5' deep.
This would require a terex reedrill or similar rig. If you know of
a firm with that equipment in Wisconsin please contact me off
list.<o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<DIV>
<P class=MsoNormal>Also, one site has a high water table, so any tips on
pouring in that environment would be welcomed.<o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<DIV>
<P class=MsoNormal>Thanks<o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<DIV>
<P class=MsoNormal><o:p> </o:p></P>
<DIV>
<P class=MsoNormal><SPAN class=apple-style-span><B><SPAN
style="FONT-FAMILY: 'Helvetica','sans-serif'; COLOR: black; FONT-SIZE: 13.5pt">Ryan
Harkins</SPAN></B></SPAN><B><SPAN
style="FONT-FAMILY: 'Helvetica','sans-serif'; COLOR: black; FONT-SIZE: 13.5pt"><BR><SPAN
class=apple-style-span>NABCEP Certified Solar PV Installer /</SPAN><BR><SPAN
class=apple-style-span>Project Manager</SPAN></SPAN></B><SPAN
style="FONT-FAMILY: 'Helvetica','sans-serif'; COLOR: black; FONT-SIZE: 13.5pt"><BR><SPAN
class=apple-style-span>
</SPAN><BR><BR><BR></SPAN><o:p></o:p></P></DIV></DIV></DIV>
<P>
<HR>
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