[TowerTalk] Tower buried section legs -- Buried in Concrete orBelow

[john at kk9a.com]

I concur. Also you would need a lot wider chunk of concrete to bury a
section.

John KK9A


To:	<towertalk at contesting.com>
Subject:	Re: [TowerTalk] Tower buried section legs -- Buried in Concrete
orBelow the Concrete?
From:	"Jeff DePolo" <jd0 at 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