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Re: [TowerTalk] pipe anchors

Subject: Re: [TowerTalk] pipe anchors
Date: Sat, 29 Oct 2011 12:48:00 -0400 (EDT)
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My GUESS would be that 4" galvanized pipe would work.  I would  sink it  
about four feet in a base about 3 x 3 x 1.5 feet of  concrete.  That would be 
in a hole 3 x 3 x 4 so you would only fill  the hole up 18 inches with 
concrete and back fill the rest with the  dirt from the hole.  if it was in my 
backyard, I would sleep well at night  with the set up.  You might be able to 
get by with less, but do you really  want to try.  Towers make a big boom 
when they come down.
The three anchor bases would need a total of 1.5 yards and your  base for 
the Rohn 25 will need another yard or so.  If your concrete  company has a 5 
yard minimum (many do) simply pour the rest into the three  anchor holes.  
They will never go anywhere...for sure.
As an extra you might want to dump concrete down the pipe...stops  the pipe 
from filling with water and adds some strength.  If you do I would  order 
the mud with small agregate for easier pouring.
In a message dated 10/29/2011 4:09:54 P.M. Greenwich Standard Time, writes:

I live  on a small city lot and am in the process of installing a 40 ft 
Rohn 25G  tower in my back yard with a pier pin base. I'd really like to 
avoid using  screw in anchors in such close quarters and would prefer to 
use an  elevated guy anchor like pipe set in cement. I originally thought 
that 11  ft would be great to clear my roof line but have been told that 
would  require a pipe larger than what I can obtain around here. Revising 
my  plans a 4 ft high pipe in the corners of the back yard would still be  
better than going to ground level. Can anyone give me an approximate  
idea as to what size pipe and what size base might be needed?

My  tower is 40 ft, I would have at most 12 lbs of wind load on it, my 
soil is  a pretty heavy clay with no sand and no rock at least down to 4 
ft., our  wind zone is said to be 70 MPH. Any input would be greatly  


Richard /  N5YPJ

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