[RE-wrenches] helical screw piers

Larry Brown sunmountain at netstep.net
Mon Jan 26 04:24:26 PST 2009


Wrenches,
We used a company called techno Metal Post   
( www.technometalpost.com ) I believe it is a franchise arrangement  
with the main company in Canada. Here is a business opportunity if a  
franchise does not exist in your community.
They are screwed into the ground while hydraulic pressure is applied.  
We received a stamped engineering report after completion that  
identified how many posts were set,  to what depth and how much  
hydraulic pressure had been applied for load bearing capacity
It requires a special unit designed for this purpose
We set 8 posts in 2 rows of 4 and then attached a UniRac U-LA Ground  
Mount racking system for 28 Sanyo 200's
The posts in this case were 2" schedule 40 galvanized steel pipe  
ready for the UniRac mounting system
They also shot the elevation and cut each pipe to the proper height  
so that the relationship between the front row of pipes and the back  
row of pipes was set to receive the racking system and then the  
mounting rails would be at latitude for this site.  We supplied the  
heights that were required.
Many other uses for these screw piers.  Pictures on their website

Larry



On Jan 26, 2009, at 1:48 AM, ASAP POWER! 2 wrote:

> Sounds like we gots to have it.  Larry, any pics?   If I assume  
> correctly, these are literally screwing into the ground in place of  
> a concrete footing.  such that you can place/attach a structural or  
> pipe column or its part of the screw.   I can call some local  
> rental yards and do some internet searching, but is there a brand  
> name to the screw, driver, or a specialized 4WD unit?  How many did  
> you drive for 5.6kW?
>
> I had contacted the outfit that advertised on TV/web for a while a  
> couple of years ago, but wasn't impressed, however, thought maybe  
> with the right soil it could be exceptional tool for quick guy wire  
> anchoring purposes for wind towers.   This sounds like something  
> more substantial.
>
> Thanks,
> Peter D.
>
> From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches- 
> bounces at lists.re-wrenches.org] On Behalf Of Larry Brown
> Sent: Sunday, January 25, 2009 5:58 PM
> To: RE-wrenches
> Subject: Re: [RE-wrenches] helical screw piers
>
> Eric,
>
> We just used helical screw piers on a 5.6kw ground mount
> The site was difficult due to its slope and soft because the frost  
> had come back out after some warm days
> There was an excellent chance that a concrete truck would have  
> gotten stuck and a back hoe would have made a mess
> The 4 wheel drive unit that drives the helical screw piers had no  
> trouble navigating the terrain, did no damage to the site, was in  
> and out in less than a day.
> The piers were in two parallel rows and all were within 1/2" of our  
> string, though that is in the skill of the operator
> In very rocky soil it might be more problematic
>
> Larry Brown
> Sun Mountain
>
>
> On Jan 25, 2009, at 8:05 PM, Eric Andrews wrote:
>
>> Does anyone have any experience using Helical screw pier footing  
>> for ground mount racks?
>>
>>
>> Eric
>>
>>
>>
>> _______________________________________________
>> List sponsored by Home Power magazine
>>
>> List Address: RE-wrenches at lists.re-wrenches.org
>>
>> Options & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches- 
>> re-wrenches.org
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out participant bios:
>> www.members.re-wrenches.org
>>
>
> _______________________________________________
> List sponsored by Home Power magazine
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Options & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re- 
> wrenches.org
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out participant bios:
> www.members.re-wrenches.org
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20090126/e05e48d4/attachment-0003.html>


More information about the RE-wrenches mailing list