Jeff,
That looks like a really useful product. As an ex-geologist, I would
recommend caution in using this for an application where the soil may
be subject to slippage. On a steep slope, you will likely want to
dig down to a solid layer that will not move. Bedrock would be ideal.
Drake
At 09:30 PM 4/24/2009, you wrote:
We have an upcoming install for a residence subject to Homeowners
Association controls and they have demanded that the array be
mounted on the ground, not the roof. The client has a huge yard,
but the south facing yard area for the array slopes down fairly
steeply. Of course this is ideal for tilt angle so we can keep the
array just high enough above the ground to crawl under to wire and
put down sheeting material to reduce grass growing.
However, this will be a real bear to get a tractor or Bobcat on this
steep slope to auger holes for the concrete piers, and then get the
concrete down to the pour. So I started checking and found a
company selling a self-drilling 2-1/2" galvanized pier that you
auger into the ground with a 3/4" drive wrench. After auger drills
itself all the way down, you add an extension tube that is
adjustable in height. It would be perfect for my application, but I
am afraid its too good to be true.
Here is a video link for the product.
<http://www.youtube.com/watch?v=Syl-MKD-1BE>http://www.youtube.com/watch?v=Syl-MKD-1BE
My concern is will my racking start to move downhill if these posts
start to tilt over from the side loading, and will the pull out of
the ground from a major wind uplift.
Thanks,
Jeff Yago
----------
Netscape. Just the Net You Need.
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Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
740-448-7328
740-856-9648
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