[TowerTalk] World's toughest fixes - 2000' tower

[Dick Green WC1M]

> IIRC, the Empire State Building is spec'ed to sway in high winds. The
exact
> numbers elude me.

I think that's the case for all tall buildings, and must require some
interesting engineering for various parts to flex properly in response. I
vaguely remember hearing a long time ago about a new skyscraper (can't
recall where) on which the window mountings hadn't been specified correctly.
When the building swayed, panes would occasionally loosen and fall out. Of
course, they did a quick fix. Must have been very expensive because there
are a lot of windows in a tall skyscraper.

73, Dick WC1M

> -----Original Message-----
> From: RICHARD SOLOMON [mailto:w1ksz at q.com]
> Sent: Friday, July 17, 2009 12:54 PM
> To: TowerTalk
> Subject: Re: [TowerTalk] World's toughest fixes - 2000' tower
> 
> 
> 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 at karlquist.com
> > To: jimlux at earthlink.net
> > CC: martin.s.ewing at gmail.com; towertalk at 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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