My brother-in-law used to have an office on the 85th floor of the Sears
Tower. When the wind blew - it seems to do that often in Chicago - his
pictures would lean out from the wall.
Regarding the guyed/unguyed question, take a look at the guyed tower
study on K7NV's web site for Yagistress, at
<http://k7nv.com/notebook/towerstudy/towerstudy1.html> Guyed towers
obviously *do* deflect.
73, Pete N4ZR
On 7/17/2009 2:59 PM, Dick Green WC1M wrote:
>> 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@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@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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>>>> http://lists.contesting.com/mailman/listinfo/towertalk
>>>>
>>>>
>>>>
>>> _______________________________________________
>>>
>>>
>>>
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>>>
>
>
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>
>
>
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