[TowerTalk] Advice needed on embedding guy anchor rod in concrete deadman

[john at kk9a.com]

I have put in a number of these.  I use a concrete form underground (I know
that it is now disturbed soil) and attach a 2x4 to the front that sticks up
above the form.  I also make a little wooden bracket and bolt the anchor to
it using the turnbuckle holes. So the top of the anchor is supported by the
wood bracket which I nail in the ground with repar and the middle is
supported by the 2x4 sticking up above my form. The bottom of the anchor is
just hanging in space waiting for concrete.

John KK9A



To:	towertalk at contesting.com
Subject:	[TowerTalk] Advice needed on embedding guy anchor rod in
concrete	deadman
From:	"Richard (Rick) Karlquist" <richard at karlquist.com>
Date:	Fri, 10 Jun 2016 20:08:00 -0700

I'm planning some concrete deadman guy anchors
using Rohn GAC303 or Endurance Helix4-54 anchor
rods, to be embedded in the concrete.  I am
looking for suggestions on how to fixture
the rod correctly to prepare for the concrete pour.
Obviously, I need to get both the azimuth and
elevations angles correct so that the guy cable
pulls in a pure axial mode, without putting
a deflecting load on the rod.  I'm trying to
brainstorm some positioning technique.  Any
suggestions?  How about if I pre-attach the
rod to a rectangular piece of plywood at the correct
elevation angle.  Then I mount the plywood
such that it is square and plumb with respect
to the foundation perimeter?

Alternately, I tie the bottom of the rod into
the rebar cage and install a temporary post
in the ground that will support the top of the
anchor rod.  Seems difficult to get this post
correctly positioned in 3 dimensional space.

Surely someone has solved this problem before.
I don't remember seeing any previous discussion
of it on TT.

Rick N6RK