We have hit rock at 24-30” on several installs over the years and drilled in, hammered in set rebar with concrete epoxy & in the case of a tracker got an engineered base designed with it pinned to the rock.
Dana Orzel Great Solar Works, Inc. C - 208.721.7003 d...@solarwork.com Idaho Contractor - # 028765 Idaho PV # 028374 NABCEP # 051112-136 <http://www.greatsolarworks.com> www.greatsolarworks.com "Responsible Technologies for Responsible People since 1988" P Please consider the environment before printing this email. From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> On Behalf Of Ray Sent: Wednesday, June 23, 2021 5:39 PM To: re-wrenches@lists.re-wrenches.org Subject: Re: [RE-wrenches] Top of Pole Mount Array on Ledge If you can get anchor bolts in, you can weld on a 1" think plate with gussets to the bottom of the pole. We've had to do this a couple of times in rock. We'll pour enough concrete to get a level base, but the bolts are epoxied into holes in the rock. A good epoxy anchor is stronger than the bolt itself. We've also done combinations, where we can only get 18" of concrete over the rock, then we epoxy in rebar to tie the concrete to the rock, and J bolts set in the concrete to bolt the base plate to. Ray Walters Remote Solar 303 505-8760 On 6/23/21 7:01 PM, Dave Angelini Offgrid Solar wrote: A pole mount can be part of a virtually tracked array system. Gives long hours of power, if that is the reason she wants this. It can be angled for SW 9 months and go south for the winter. It needs another array or combo of arrays for SE and S. If it is some other weird reason she wants this, I would just do it and bill in advance. Tell her only death and taxes are guaranteed! Somebody else will have info on a pole mount with ballast. That would be interesting! There is no danger to your screw guy right? Dave Angelini Offgrid Solar "we go where powerlines don't" http://members.sti.net/offgridsolar/ e-mail offgridso...@sti.net <mailto:offgridso...@sti.net> text 209 813 0060 On Wed, 23 Jun 2021 18:39:55 -0400, "Ben's Solar and Battery" <mailto:b...@mcfeeters.net> <b...@mcfeeters.net> wrote: Hi Wrenches, We typically use SunModo ground mounts with ground screws which we can put just about anywhere as our screw guy has a rock drill. We have one customer who is dead set on a top of pole mount array and will not settle for a typical ground mount with multiple posts. There is shallow ledge all over her property and we feel that digging multiple large holes to find one spot where we might be able to get deep enough would be a waste of time and resources. We have called an underground locator who uses ground penetrating radar and he scanned a few spots, but was unable to give us a good location based on soil types. What are you guys doing in this situation? Are there any alternatives, such as a pole mount with large base and ground screws? I hate saying it can't be done! Thanks! Ben _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org <mailto:RE-wrenches@lists.re-wrenches.org> Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
_______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
