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[SEAOC] Re: [SEAOC] Re: [SEAOC] Re: [SEAOC] Re: [SEAOC] ASD vs. LRFD Survey Summary

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At 10:30 AM 6/12/96 -0700, Julie Mark Cohen wrote:
>On Wed, 12 Jun 1996, David Owens wrote:
>
>> At 09:16 AM 6/12/96 -0600, Christopher Wright wrote:
>> >>fine. The most common reason given for switching to LRFD is that it results
>> >>in slimmer, more efficient designs.
>> >
>> As in Tacoma Narrows, perhaps?
>
>The Tacoma Narrows Bridge collapse was a design and systems-oriented 
>problem.  Torsion can be limited somewhat by increasing member sizes, 
>but can by understanding overall geometry and behavioral response.


Dear Julie Mark-

What do you mean-exactly-by a systems-oriented problem? They had to add
trusses-and did it to most of the bridges in America.


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