[TowerTalk] Towers on Rock Ledge

[Geoff]

I dug down to the ledge and then had 2" diameter holes drilled down 8' at
the guy angle.
Installed power company rock anchors, locked in place and filled the rest of
the hole with "Pour Rock" to seal.
That was 11 years ago and no problems whatsoever with a total of 4 towers.

The anchors are 3/4" diameter with heavy galvanizing; easy to attach Rohn 3
and 5 level equalizing plates.

G


----- Original Message ----- 
From: "Martin Ewing AA6E" <aa6e at arrl.net>
To: <towertalk at contesting.com>
Sent: Monday, August 18, 2003 12:51 PM
Subject: [TowerTalk] Towers on Rock Ledge


> Folks,
>
> Is there any general information available on siting towers on rock?  I
have
> granite ledge just a foot or less down, so digging the big hole in the
ground
> won't do the trick here.
>
> I suppose one needs "local engineering", but maybe there is some design
info to
> help get me oriented.
>
> Tnx / 73,  Martin, AA6E
>
> _______________________________________________
>
> See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
>
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