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[TowerTalk] INFO NEEDED-Setting tower in hardrock

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Subject: [TowerTalk] INFO NEEDED-Setting tower in hardrock
From: mcduffie@scottsbluff.net (Gary McDuffie, Sr.)
Date: Fri, 29 Oct 1999 08:32:55 -0600
On Fri, 29 Oct 1999 06:46:00 -0500, Jeffrey C. Rowsey wrote:

> My plan is to go to the local equipment
> rental shop and rent a backhoe with a jack hammer attached.  I used one to dig
> the footings for my house and it worked real well.  I've got to get a 4'x4'x7'
> hole in pure rock.

I'm no expert, just offering a first impression question about this.
Can you maintain a good shape to the hole in rock?  Shape of the hole is
of some importance too, in order to maintain tipping strength.  If it is
a guyed tower (original post is gone), it only needs to have vertical
and horizontal strength, not anti-tipping grip.  Of course, at 7' it
will have some grip.  I worry about the jaggies on the sides breaking
under tipping forces in the case of a self-support role.

gm
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