[Top] [All Lists]

[TowerTalk] Fwd: Fwd: Fwd: Maximum Guy Radius

Subject: [TowerTalk] Fwd: Fwd: Fwd: Maximum Guy Radius
Date: Mon, 10 Oct 2011 15:03:44 -0400 (EDT)
List-post: <">>
Hi Bill,
I just calculated the torque on the tower element and compared them with  
manufacturer recommended maximum torque. I found a small difference between a 
 stiff ground mounting and flexible ground mounting. I also tested 
different  locations of the guy wire attachment and selected the "best" point. 
That's why  the guy wires are attached 16 feet from the top. I did not make any 
calculations  of stress on the individual legs (which I probably should have 
done to know for  sure everything is within limits) but reasoned that; as 
the tower is suppose to  be self-supporting it should be better with guy 
wires. As I have the guys  anchors at the 100% point I am not concerned that 
things will go wrong. Better:  If it goes wrong it will be regardless what I 
You are right though, the stress on the tower legs is critical as it is  
what makes the tower stand.
Hans - N2JFS
In a message dated 10/7/2011 6:45:24 P.M. Eastern Daylight Time, writes:

I wondered, because I'd always  heard that Tower leg compressive stresses 
were a critical factor. Did you  monitor them?
My tower has four guys, but mostly for access and stability  rather than 
stress. (It is a folding unit) It is interesting to follow the  tower leg 
forces and the Guy stress as the wind direction is rotated from the  "between 
leg" direction to the "In Line" direction for different numbers of  anchors.

On 10/6/2011 7:54 PM,  _HansLG@aol.com_ (  wrote:  

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 

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 

(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.



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