[TowerTalk] rotary or demo hammer for ground rods

[Bryan Swadener via TowerTalk]

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
>