<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">It definitely stiffens the pole, and prevents water from rusting it out from the inside.<div>While I might use the stiffening effect to get a couple of extra feet out of the ground, I wouldn't start downsizing your poles because you poured concrete in them.</div><div>I think it would be fair to compare the effect of adding concrete to going to SCH 80 pipe. </div><div>Unfortunately, I don't have any good structural analysis to back that up, but if we have the extra concrete, we try to fill the pole.</div><div>One of these days if I get a research grant, I'll do some deflection tests to try and better quantify this.</div><div><br><div>
<span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div>R. Walters</div><div><a href="mailto:ray@solarray.com">ray@solarray.com</a></div><div>Solar Engineer</div><div><br class="khtml-block-placeholder"></div><div><br class="khtml-block-placeholder"></div><br class="Apple-interchange-newline"></span>
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<br><div><div>On Jul 26, 2011, at 12:49 PM, <a href="mailto:toddcory@finestplanet.com">toddcory@finestplanet.com</a> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><font face="arial" size="4"><p>Wrenches,</p><div> <br class="webkit-block-placeholder"></div><p>Fact or fiction: Adding concrete to the inside of a pole mount pipe makes it stronger.</p><div> <br class="webkit-block-placeholder"></div><p>Thanks,</p><div> <br class="webkit-block-placeholder"></div><p>Todd</p></font><br><br><br>Sent from Finest Planet WebMail.<br>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Options & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org<br><br>List rules & etiquette:<br>www.re-wrenches.org/etiquette.htm<br><br>Check out participant bios:<br>www.members.re-wrenches.org<br><br></blockquote></div><br></div></body></html>