Special phone company grout, no doubt. :-)
http://www.baroididp.com/idp/products-applications/products/grouting-products/idp-550.page
On Sun, Jan 18, 2015 at 11:43 PM, Ken <wa8jxm@gmail.com> wrote:
> Would grout provide an adequate electrical path to the rock ground?
> Does the rock itself provide an electrical ground?
>
> Ken
>
> > On Jan 18, 2015, at 11:05 PM, Mickey Baker <n4mb@arrl.net> wrote:
> >
> > The solution was to
> > deploy a construction crew with a 48" x 1 1/4" hammer drill bit, to drill
> > two holes to a depth of 48" and attempt to drive the rod beyond that. If
> > that worked, the hole was grouted shut around the rod. If it didn't work,
> > the rod was to be cut to 48" and each end grouted into the two holes,
> both
> > connected to the booth with #6 solid copper.
>
>
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