Holt,<div><br></div><div>I have no experience with this but Unirac just announced a ballasted ground-mount system for commercial / utility systems:</div><div><a href="http://www.unirac.com/mounting-solutions/isys.php">http://www.unirac.com/mounting-solutions/isys.php</a></div>
<div><br></div><div><br></div><div><a href="http://www.unirac.com/mounting-solutions/isys.php"></a>Best regards,</div><div>Nik</div><div><br></div><div><br></div><div>--<br>Nicholas Ponzio<br>Building Energy<br>1570 South Brownell Road<br>
Williston, VT 05495<br><br>t: 802-859-3384 x15<br>f: 802-658-3982<br><a href="http://www.BuildingEnergyVT.com">www.BuildingEnergyVT.com</a><br><br>"Building Solutions for a Sustainable Future"<br><br><br>
<br><br><div class="gmail_quote">On Wed, Jul 8, 2009 at 3:33 PM, <span dir="ltr"><<a href="mailto:holtek@sbcglobal.net">holtek@sbcglobal.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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<div>Situation:</div>
<div>ROCK - limestone ledge on cliff. Surface is relatively smooth with little
to no grade in a 30' x 30' area. Basically a largeslab of limestone about
4' thick.</div>
<div>Question:</div>
<div>Anyone haveexperience with some type of ballasted mount system for
either fixed or tracked array in this type of environment?Boring
holeswill be very expensive. I've seen the precast bellshaped
ballasting on commercial projects, wondering if there is a way to do that on
residential size array of 5 to 10kw.</div>
<div>Thanks in advance.</div>
<div><br></div></div></blockquote></div></div>