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Re: [TowerTalk] Rohn BPC25G

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Subject: Re: [TowerTalk] Rohn BPC25G
From: "James Wolf" <>
Date: Mon, 14 May 2007 00:26:37 -0400
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>You don't want anything sticking out of the concrete either rebar or a
ground rod. Not because it is a lightning path but because it will corrode
>(rust) and the corrosion will work its way up into the concrete and that
will crack the concrete.

>It is fine to use the rebar inside the concrete as an auxiliary ground for
the tower but it should all be tied together in the concrete so that there
is >no arcing from one piece to another in there.

>It is just as important to build the concrete so that no water accumulates
around any pier pin or j bolts sticking out of the top too. If they rust
down >into the concrete you will have the same problem with the concrete

>Gary  K4FMX


Can you expand on this.  We have used usually two ground rods in a tower
base (where the tower base is imbedded in concrete) for years.  We angle
them in opposite directions out the bottom and attach them to the base and
rebar using brazing and tar to coat the weld.  Only the tower base itself
sticks out the top.  Are you saying that using the ground rods the way we
are, poses a potential base failure due to corrosion?


Jim, KR9U


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