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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