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[TowerTalk] Fwd: Maximum Guy Radius

Subject: [TowerTalk] Fwd: Maximum Guy Radius
Date: Sat, 1 Oct 2011 23:17:02 -0400 (EDT)
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Hi Dorn,
I made some calculations regarding guy wires some time ago. One thing I  
found out was that you gain some stiffness by mowing the guy anchor out some.  
Not considering the sag, the optimum anchor point is about 140%. If you  
include sag you probably have to decrease that a little. I also noted that it 
is  a lot easier to use four guy wires instead of three. The position of the 
angle  is much less critical.
I use 5/16" (11,400#) utility grade wire for my guys which was a lot  
easier to work with than expected. You can check it out at 
73 de,
Hans - N2JFS
In a message dated 9/21/2011 9:33:45 A.M. Eastern Daylight Time, writes:

If I  have a tower of a specific fixed height that I will be erecting,
and I have  plenty of room to do so, I would estimate that I should
gain *some*  additional strength against wind-load by moving the
guy radius from 80% of  height to 100% of height, since this will
move the guy angle closer to  horizontal and reduce the down
force on the tower and increase the  horizontal back-force for
a given guy tension and a given stretch in a guy  due to motion
of the tower.

Can anyone comment from either a  practical experience or
engineering point of view whether this estimate is  sound?


Dorn  Hetzel


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