[TowerTalk] Rohn raised guy mounts

[Wayne Kline]

I do not have specs for the raised guy anchors I have installed over the years. BUT   my rule of thumb  is 60/40    These were for towers in the 140 plus feet.  But  started with 12 to 14 foot length of 12 in I beams  ¼ web.    A few were sawn  at a 45 degree  angle and drilled for the jaw turnbuckles. Other   used a same piece of I beam gut  down the middle   web and drilled to bolt to the flange face and then for the holes of the Jaw  end of the turnbuckles.

 As for the holes min was 6 foot depth    perindicular to the tower and 4 foot width.  The bottom web was drilled  6 hole pattern  to slide in the  1/2 inch rebar .

As for concrete  I fill the hole 50%  and then back fill with tamped ground…  I am not in favor of the FULL   hole fill. IMO it’s like a cork in a wine bottle, wonce the friction of the walls in over come it POPS out ….. where the buried DEAD man has allot of earth to over come /



My .02



Wayne W3EA



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From: TowerTalk <towertalk-bounces at contesting.com> on behalf of Fred Keen via TowerTalk <towertalk at contesting.com>
Sent: Monday, March 19, 2018 5:53:45 PM
To: towertalk at contesting.com; Ed Sawyer
Subject: Re: [TowerTalk] Rohn raised guy mounts

We installed raised guy posts similar to Eds. I bought 8" wide flange beams (I beams) 12' long and had 3/4" rods 36" long welded to the front and rear (three each side) of the flat faces of the beams about 8" apart on the lower 3 feet of the beam. We then set the bottom 4' of the beam into a 4' x 4' x 4' hole and and filled with concrete.
This allows me to mow with approximately 8' height clearance around the base.
The tower is 70' Rohn 45, with guy connections at 33' and 66'. The top 20' of the guys are phillystran.It supports a Force 6BA 40-10meter yagi, 80 meter rotatable dipole and 6meter yagi.
Note, you should take into account the guy spacing as shown in the book going to the ground will be different for the top and middle guys. I would use the dimensions for the top guys. This you can do with a scaled graph chart.

Good luck with your venture.
Fred KC5YN






    On Monday, March 19, 2018, 12:17:08 PM CDT, Ed Sawyer <sawyered at earthlink.net> wrote:

 The ones I have seen were home made.  12 or so ft of building construction
grade steel I beam with a few guy attach holes drilled near the top of one
end and a couple of holes for some steel rods to be passed through on the
bottom end.  The lower 4 ft or so is buried in concrete with the steel rods
going through at right angles to the I beam.



Ed  N1UR

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