[RE-wrenches] Top of Pole Mount Array on Ledge

[Dana Orzel]

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                       dana at 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-bounces at lists.re-wrenches.org> On Behalf Of Ray
Sent: Wednesday, June 23, 2021 5:39 PM
To: re-wrenches at 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  offgridsolar at sti.net <mailto:offgridsolar at sti.net> 
text 209 813 0060

On Wed, 23 Jun 2021 18:39:55 -0400, "Ben's Solar and Battery"  <mailto:ben at mcfeeters.net> <ben at 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 





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