I concur. Also you would need a lot wider chunk of concrete to bury a
section.
John KK9A
To: <towertalk@contesting.com>
Subject: Re: [TowerTalk] Tower buried section legs -- Buried in Concrete
orBelow the Concrete?
From: "Jeff DePolo" <jd0@broadsci.com>
Date: Mon, 08 Feb 2016 23:50:58 -0500
I have no reason to doubt that's the case, but unless there was a real good
reason to do it, I would almost always be biased towards a pier pin. The
encased bottom section provides some resistance to axial rotation, and if
the tower is designed and guyed properly with respect to the design loads,
that should be a non-issue -- the guy wires (double-guyed if necessary)
and/or torque arms/triangles should be doing the work, not the base. The
buried base could be argued to provide a bit more lightning protection, but
a properly-designed and properly-installed ground system makes that a moot
point as well. If anything, the pier foundation would require less concrete
than a buried base as the only stress is compression with a pin.
So, what's left that would make the buried base preferable over a pier pin?
Saving a few minutes of time when stacking the bottom couple of sections is
hardly a reason in my book :-)
73.
--- Jeff WN3A
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