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Narasimham wrote:
> Phil Carmody wrote:
> > "Richard Henry" <pomerado@xxxxxxxxxxx> writes:
> > > Narasimham wrote:
> > >
> > > > Sorry,it is not so as we gather.As Progenoskes also observed,Tacoma
> > > > Narrows Bridge was a new physics/mechanics situation as a strange
> > > > unsteady state aerodynamics phenomenon that had not been encountered in
> > > > engineering situations up till that point of time...naturally not
> > > > mathematically modeled to be handed down to practising design
> > > > engineers.The failure analysis commitee also cleared them of any
> > > > charges of negligence. Even in late nineties a Boeing aircraft
> > > > empennage was destroyed at Japan Norita airport due to such
> > > > causes.However the degree of goofitude in Hyatt Hotel is an order of
> > > > magnitude higher.
> > >
> > > The Hyatt Hotel walkway was not built as designed, so it is hard to
> > > fault the designer.
> >
> > Not built as *originally* designed. They changed the designs because
> > they were not practical from the manufacturing standpoint. It was
> > built in accordance with the new designs. Designers somewhere, and
> > the people who reviewed and signed off those designs, are to blame.
> >
> > And you *can* fault the original designer too for designing something
> > for which the components and construction were practically impossible.
> >
> > Phil
> > --
>
> If you build 10 stories above the foundation, the foundation has to
> take the weight of 10 stories in compression.If you hang 10 stories
> down from the ceiling,the ceiling has to take the weight of 10 stories
> in tension.What prevented adoption of floorwise tapering I-Beams or
> welded taper tubes? It is the speed needing to ignore blind
> spots.Granted things are more clear in hindsight.However insistence on
> routine elementary but mandatory structural checks by a second party in
>
> large constructions e.g., by finite element analysis would have
> routinely eliminated such loopholes when elemental modeling would be
> considered.This is not maths but managerial practice of safety concern
> in engineering. But"Safety does not sell."
Ummm - Remember - Most everything, built, designed, engineered,...
Is completed by the LOW bidder - You get what you pay for...
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