[TowerTalk] Ground rods

[Jim Thomson]

I drove in 4 x 8'  copper clad steel grnd rods a few years back. 
We used a rented electric jack hammer.  The trick is, for driving in
grnd rods, you require the special attachment piece, instead of the normal
asphalt blade/star bit etc.    The special attachment piece consisted of a hollow
steel tube, thickwall,which was designed for the specific task of pounding in grnd rods.

Below my lawn/soil, is hard clay.   The jackhammer drove the 8' rods ion very easily.
The tops of all rods were driven in well below grnd level, then cad-welded.   We used 3
at the tower base....and a  4th one, 40' away, just outside the basement window. 
Compression lugs used on all 3 x tower legs.  2 ga cu wire used on the 3 x tower legs. 
A 40' length of bare 2ga cu wire was C clamped at tower end.... then ran just below the soil,
to the 4th grnd rod, and cadwelded.   Then  2 ga insulated cu, from 4th grnd rod to inside of
basement, where it terminates on a large  1/4"  thick, AL plate. [SPG]

Later........ Jim   VE7RF