Hi Jim,
A couple of years ago, I used a 60# demolition hammer (aka "jack hammer") to
drive several 5/8" x 10' ground electrodes thru hardpan. One hit a BIG rock.
After several minutes, it finally broke thru. IME, anything smaller than I
used, and I might STILL be out there!
vy 73,
Bryan WA7PRC
Date: Sun, 10 Aug 2014 13:43:44 -0700
>From: Jim W5QM
>Subject: [TowerTalk] rotary or demo hammer for ground rods
>
>Hi gang,
>
>I am in the market for a rotary or demo hammer for remodeling work. I am
>looking at tools that deliver 7-10# percussive force (10-14 joules).What is
>the size recommendation for a rotary or demo hammer for driving ground rods?
>I'm sure that soil conditions play a large part but what is the minimum that
>will drive a ground rod in a timely manner? It would be nice to have a use for
>the tool once the work is done.
>
>Tnx es 73,
>Jim W5QM
>
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