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-boun...@lists.re-wrenches.org [mailto:re-wrenches-
boun...@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
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