In a message dated 97-01-05 19:56:46 EST, firstname.lastname@example.org writes:
>What about leaving the re bar cage alone, and installing a dedicated
>ground conductor within the foundation which would be connected to the
>tower itself above the foundation and would be laid within the
>foundation a few inches from the exterior? If the conductor were
>something like galvanized steel strap, there would be little potential
>for electrolysis with the rebar and j bolts. Any comments???
What you're describing IS the rebar cage or something similar. If you
don't have it connected to the rest of the system, then you still have the
voltage potential differences and possible (probable?) arcing. Your goal for
your ground system is to have everything tied together. Don't forget that
you can have an induced ground strike that doesn't come down the tower but
comes from earth from a nearby strike.
The concrete has lye in it and other nasty chemicals so corrosion and
dissimilar metals is always a factor. Unfortunately there's not much you can
do about it. All of the techniques and materials under discussion are the
accepted practices and materials used by commercial builders and installers.
Don't feel compelled to re-invent the wheel or come up with a non-standard
73, Steve K7LXC
TOWER TECH -- professional tower supplies and services for amateurs
FAQ on WWW: http://www.contesting.com/towertalkfaq.html
Administrative requests: towertalk-REQUEST@contesting.com
Sponsored by Akorn Access, Inc & KM9P