Tacoma Narrows Bridge:
http://en.wikipedia.org/wiki/Tacoma_Narrows_Bridge_(1940)
Real Life Experience informing Good Engineering Practice. The value of
understanding frequency and resonance.
Rich
NU6T
-----Original Message-----
>From: David Gilbert <xdavid@cis-broadband.com>
>Sent: Jan 18, 2010 9:41 AM
>To: TowerTalk <towertalk@contesting.com>
>Subject: Re: [TowerTalk] Guying a tower....Heresy to follow.....
>True statement!
>
>
>Doug,
>
>What you originally stated, and what I originally responded to, was
>"real life experience which trumps any theory any day." I totally
>disagree with that statement, with countless historical examples to
>prove the point.
>
>Actually, engineering DOES have all the answers given total knowledge of
>conditions and proper application of theory. We don't always have that
>full knowledge, of course, but that isn't the fault of "engineering" per
>se. Trial and error is often what teaches us when we didn't fully
>understand something, but it is engineering that lets us effectively
>apply that new knowledge to the next situation.
>
>I will agree that many things are over engineered, but everyone has
>their own impression of where that line should be drawn when safety or
>financial liability is involved ... such as with towers.
>
>Dave AB7E
>
>
>> Dave
>>
>> Where did I say that one should not engineer something? My words were
>> 'over engineer'.
>>
>> Experience and engineering have to work together. Too many folks
>> believe that 'engineering' has ALL the answers and completely discount
>> experience. Engineering does not have all the answers. That is my
>> point. A lot has been and is learned from 'trial and error'.
>>
>> Doug
>>
>> I'll run the race and I will never be the same again.
>>
>> -----Original Message-----
>> From: towertalk-bounces@contesting.com
>> [mailto:towertalk-bounces@contesting.com] On Behalf Of David Gilbert
>> Sent: January 18, 2010 10:12 AM
>> To: TowerTalk
>> Subject: Re: [TowerTalk] Guying a tower....Heresy to follow..... True
>> statement!
>>
>>
>> Let me clarify for you ... there is a huge difference between not over
>> engineering something and not engineering anything at all. Basing a
>> decision solely upon experience falls into the category of not
>> engineering anything at all, and that includes ignoring force vector
>> formulas because your tower hasn't yet failed and not wearing a climbing
>>
>> belt/harness because you haven't yet fallen.
>>
>> Dave AB7E
>>
>>
>> Doug Renwick wrote:
>>
>>> Most can not see any similarity between what I said and what you are
>>> saying. Sheesh, why do I dislike spin doctors.
>>>
>>> Doug
>>>
>>
>>
>>
>>
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