[Top] [All Lists]

[TowerTalk] Fwd: Fwd: Maximum Guy Radius

Subject: [TowerTalk] Fwd: Fwd: Maximum Guy Radius
Date: Thu, 6 Oct 2011 20:54:58 -0400 (EDT)
List-post: <">>
Hi Bill,
With"stiffness" I mean how much the tower will move for a specific wind  
pressure. In my calculations I assumed that the tower moved 1" for a give 
wind.  Then I calculated how much the tower moved for the same wind force with  
different guy anchor point. I found that minimum move was for an anchor 
distance  of ~142%. (probably sqr(2)) under the assumption of no guy wire sag 
(which is  impossible).
I was just "playing around" with a spread sheet and was interested to see  
where the optimum point was. 0% anchor point is no good for obvious reason 
but  an anchor point very far away is not good either as the guy wire is 
springy and  a too long wire will allow the tower to sway in the wind.
That's when I saw how much less critical the angle is between the wires  
when you are using four guy wires instead of three.
Hans - N2JFS
In a message dated 10/6/2011 3:57:02 P.M. Eastern Daylight Time, writes:

When anyone uses the words "stiffness" and  "optimum", I want to ask 
"Stiffness of what?" and "With respect to what  criteria?"
Also- what type of tower?  Why Utility and not  EHS?

On 10/1/2011 10:17 PM,  _HansLG@aol.com_ (  wrote:  

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 

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 

is  a lot easier to use four guy wires instead of three. The position of 

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


TowerTalk mailing list
<Prev in Thread] Current Thread [Next in Thread>