Text 22280, 52 rader
Skriven 2006-01-01 12:33:23 av Roy Witt (1:1/22)
  Kommentar till text 20641 av MIKE ROSS (1:167/133.0)
Ärende: WTC fire         (was; Lack of Gratitude
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01 Jan 06 00:28, MIKE ROSS wrote to Roy Witt:

 MR> "Roy Witt" bravely wrote to "Peter Knapper" (31 Dec 05  11:50:20)
 MR>  --- on the heady topic of "WTC fire         (was; Lack of Gratitude"

 RW>> A basic engineering assessment of the design of the World Trade
 RW>> Center
 RW> RW>> dispels many of the myths about its collapse. First, the
 RW> RW>> perimeter tube design of the towers protected them from failing
 RW> RW>> upon impact.
 RW>> The outer columns were engineered to stiffen the towers in heavy
 RW>> wind, and they protected the inner core, which held the gravity
 RW>> load. Removal of some of the outer columns alone could not bring the
 RW>> building down. Furthermore, because of the stiffness of the
 RW>> perimeter design, it was impossible for the aircraft impact to
 RW>> topple the building.

 RW>> However, the building was not able to withstand the intense heat of
 RW>> the jet fuel fire. While it was impossible for the fuel-rich,
 RW>> diffuse-flame fire to burn at a temperature high enough to melt the
 RW>> steel, its quick ignition and intense heat caused the steel to lose
 RW>> at
 RW> RW>> least half its strength and to deform, causing buckling or
 RW>> crippling. This weakening and deformation caused a few floors to
 RW>> fall, while the weight of the stories above them crushed the floors
 RW>> below, initiating a domino collapse.


 MR> From watching a Nova special about that WTC engineering assessment, I
 MR> recall it concluded, not so much that the steel lost its structural
 MR> integrity during the fire but, that the connecting system of the
 MR> floor joists to the outer shell was inadequate. The girder system was
 MR> being held by a single bolt and this is the part that failed
 MR> prematurely. In other words and in hindsight had the girder been
 MR> riveted or soldered in place the WTC might still be standing today.

I saw the same special which came to that same conclusion. Only it was on
either the History Channel or The Learning Channel. Or it could have been
the Discovery channel.

 MR> BTW I don't think you are so stupid, just thick as a brick!

Just keep polishing your mirror..

 MR> 2nd BTW... HAPPY NEW YEAR!!!

Same to you.


Roy
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 * Origin: Hacienda de Rio de Guadalupe * South * Texas, USA * (1:1/22)