That's a myth that has been debunked several times. Check the archives.
On 12/22/2011 5:57 PM, Ken wrote:
> On Dec 22, 2011, at 2:18 PM, David Gilbert wrote:
>> I put up an An Wireless HD-70 tower and exothermically welded some
>> ground wires to the base section before it was embedded in the concrete,
>> figuring that down there (roughly four feet below the surface of the
> Poor choice AFAIK. My understanding is that if the tower gets takes a heavy
> hit by lightning, the wire could vaporize and crack the concrete.
> Ken WA8JXM
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