[TowerTalk] Guy Wire Tension Calculation

[K9MA]

Does anyone have a reference for calculating worst-case guy wire tension 
for a 3-wire system? The only thing I'm unsure of is the effect of wind 
direction. One source states that worst case is for wind 30 degrees one 
side of a guy, and is 1.15 times the force with the wind aligned with 
the guy.  The 1.15 factor is easy to calculate, but is that really the 
worst case?. It's also clear that, with the wind exactly between two 
guys, the tension in each is the same as when the wind is aligned with 
one guy. Whether 30 degrees really is the worst case direction seems a 
non-trivial calculation.

Note that I'm not asking about calculating the effect of vertical angle, 
etc., as that's straight-forward. I'm just interested in the worst case 
horizontal component of guy wire tension as a function of wind direction.

73,

Scott K9MA

-- 
Scott  K9MA

k9ma at sdellington.us