For Barry, if the shale is that impenetrable, would it not be an impervious
layer to water, hence you might have a pool of water on the layer and
therefore a better ground than my sandy soil that the water drains through
very fast.
For the rocks. One hame near by was on an old creek bed. No water, just
hard surfaced rocks. He had to dig a deep large hole put the rods in then
back fill and wash to make anything worthwhile.
The electrical code here has changed, no ground rods, but a large plate
about 18in deep. A number of these might be the answer.
Chris opr VE7HCB
At 04:13 PM 2002-11-28 +0000, Barry wrote:
>Chuck,
>I went through this about a number of years ago. Here' we have a lot of
>shale about 4 feet down. I typically use a sledge hammer to get the rods
>in. Once, I rented a Bosch electric jack hammer (60 lbs as I recall) and
>ground rod driver. Most of them still wouldn't penetrate the rock. So, I
>cut them off at ground level with a hack saw, and just put more in the
>ground.
>Barry W2UP--
>Barry Kutner, W2UP Internet: w2up@mindspring.com
>Newtown, PA Frankford Radio Club
>
>
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