[TowerTalk] Ground Rods into Concrete Stubs

[Tom Rauch]

> What you're proposing to do has the makings of what is referred to as a
> Ufer ground.  Named for its inventor, the principle of the Ufer ground is
> simple. It is very effective and inexpensive to install during new
> construction. The Ufer ground takes advantage of concrete's properties to
> good advantage. Concrete absorbs moisture quickly and looses moisture very
> slowly. The mineral properties of concrete  and its inherent pH means
> concrete has a supply of ions to conduct current.

I can't imagine how enough parallel surface would ever exist in a 
tower base to make a "very effective" ground!

Thousands of ohms of resistance would seem too high for proper 
lightning protection.

Now if it was a large structure, like a building with welded rebar or a 
steel framework, that might be different. Even then, I'd be more 
comfortable with a real ground OUTSIDE the structure in addition to 
using the rebar.




73, Tom W8JI
w8ji@contesting.com

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