One day, many years ago, I was on the observation deck of the Empire
State Building. There was a crowd of schoolgirls there with chaperones.
I had a 2" steel Ball Bearing that I placed on the steel floor. Now it was
a rather windy day. Shortly the ball started moving back and forth. One
of the chaperones asked me why the ball was moving, I told her the ball
was not moving. After a bit of thought, they quickly moved the group to
the elevators !!
IIRC, the Empire State Building is spec'ed to sway in high winds. The exact
numbers elude me.
73, Dick, W1KSZ
> Date: Fri, 17 Jul 2009 09:13:13 -0700
> From: richard@karlquist.com
> To: jimlux@earthlink.net
> CC: martin.s.ewing@gmail.com; towertalk@contesting.com
> Subject: Re: [TowerTalk] World's toughest fixes - 2000' tower
>
> 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
>
> jimlux wrote:
> > Martin Ewing wrote:
> >> Inquiring minds want to know: why is 2000 ft scarier than 20 ft? More
> >> time to think on the way down?
> >>
> >> Morbid humor, I know, but it's something I consider when I feel a need
> >> to climb my 20 ft roof mount. ;-)
> >>
> >> 7
> >
> > THe top of a tall mast moves around a LOT more in the wind than a
> > shorter one.
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