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--></style></head><body lang="EN-US" link="blue" vlink="purple"><div class="WordSection1"><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">Eric:</span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black"> </span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">Have you considered driven-pipe? Hereabouts there are several contractors set up with Bob-cat mounted drivers for corral fencing. They are also equipped to weld.</span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black"> </span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">We have been using driven pipe for DPW LGM arrays. Recently we came upon a steep E-W slope that needed a low profile PV. Every off-the-shelf solution requires a 90 degree angle between the verticals and the horizontals. This would make an array very tall down-slope. The contractor was able to drive verticals and then custom fit “horizontals” parallel with the slope. See image below. We used only the top brackets and rails from the LGM package and it worked out quite well. We moved the verticals out-board 8” front and back and wrapped the entire assembly in 1”X2” stock fencing to prevent access to wiring.</span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black"> </span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">One local jurisdiction requires no engineering for structures less than 6’ in height. Others require engineering on all ground mounts, so you see the response can be varied. We have found a couple structural engineers that are quite reasonable in cost, typically $300-400.</span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black"> </span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">Driven pipe passed structural analysis for us only for low tilt arrays. High-tilt arrays became impractical due to requirements to drive pipe excessively deep. Engineering did allow us to reduce the amount of concrete on the packaged designs provided by DPW.</span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black"> </span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">Good luck,</span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black"> </span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">William</span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black"> </span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black"><img width="800" height="1067" id="Picture_x0020_2" src="cid:image002.jpg@01D18B3D.132BAB70"></span><span style="font-family:"Arial","sans-serif";color:black"></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black"> </span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><img width="64" height="28" id="Picture_x0020_1" src="cid:image006.jpg@01D18B3D.132BAB70" alt="Gradient Cap_mini"><br>Lic 773985<br><a href="http://www.millersolar.com/">millersolar.com</a><br>805-438-5600</span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black"> </span></p><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> RE-wrenches [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b><a href="mailto:eric@harvesthesun.com">eric@harvesthesun.com</a><br><b>Sent:</b> Thursday, March 31, 2016 10:19 AM<br><b>To:</b> RE-wrenches<br><b>Cc:</b> <a href="mailto:Ian.isbell@thatsbyers.com">Ian.isbell@thatsbyers.com</a><br><b>Subject:</b> [RE-wrenches] Helical Anchors for Ground-Mount</span></p><p class="MsoNormal"> </p><div><p class="MsoNormal">We're considering moving away from concrete footings where appropriate on GM projects. I am have not used any helical anchor systems and am curious about the efficiency of the helical anchor system in resi applications. Specifically, am I going to need soil compaction tests and/or geo survey with a P.G. stamp? What is the AHJ going to be looking for? As always, I appreciate any input! </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Eric Stikes</p></div><div><p class="MsoNormal">Founding Director & CEO</p></div><div><p class="MsoNormal">Good Sun Solar, A CA non-profit corp.</p></div><div><p class="MsoNormal"><a href="http://www.goodsun.life">www.goodsun.life</a></p></div><div><p class="MsoNormal">(530)798-3738</p></div></div></body></html>