>In a message dated 11/28/02 8:16:12 AM Pacific Standard Time,
>w2up@mindspring.com writes:
>
>> 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.
>
> Another thing you can do is to put the ground rods in the ground
>horizontally. You'll still get half of a hemisphere of influence which might
>be better than a short rod.
If you're going to lay them in a trench, you don't need the strength (and
cost) of a steel rod. Get some thin-wall copper tubing at the local
hardware store. I used two-inch copper strap at the bottom of fifty-foot
trenches.
73, Dick
--
Dick Flanagan W6OLD OOTC CFII Minden, Nevada
Visit http://www.cvrc.net
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