[TowerTalk] scariest repairs

[jim Jarvis]

Tall buildings aren't guyed structures, Bill.   I wouldn't expect to  
see 1"/100' deflection
in a guyed tower, unless the guys weren't properly tensioned.   To  
follow your rule,
you'd see 20"-40" side-sway at the top of that tower.   I don't think  
so.

I've been on self-supporters-- you can feel the Tour Eiffel sway in  
the wind, slightly.
The highest I've climbed on a guyed tower was 190', and it was as  
solid as a rock,
even with 30kt winds gusting.

Having said that, I would imagine that you could measure some lateral  
deflection in
the top of the 2000' tower, with wind gusts.   But I doubt it's  
enough to actually feel.

N2EA

That what the "Engineer" said not the tech who does the work :)  the  
spec
from rohn is about 1-2 inches of movement (if I recall correctly) for  
each
100ft at the top.  Even tall buildings move with the wind.   I am  
sure you
can feel movement at the top of that 2000ft tower.

73 Bill N1HWC

On Fri, Jul 17, 2009 at 11:13 AM, Richard (Rick) Karlquist <
richard at karlquist.com> wrote:


> I am near some 2000 foot towers.  According to the engineer
> who built them, they basically don't move at all at the top.
> He says he doesn't notice anything when the wind blows.
>
> Rick N6RK