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Steven
E. Jones 1.mp3 --- Steven
E. Jones 2.mp3 Must hear this! This sound file is
a Power Point presentation, you can follow along looking
at the pictures at this web page Here.
Or if you are already at the picture site, you can download
the mp3s and hear Dr. Jones speak about the pictures.
Why Indeed Did the WTC Buildings Collapse? |
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Diagram of the WTC construction,
see more here, Jim Hoffman's site is a great physics
study of what happened. Hear
interviews with Jim Hoffman, a research scientist,
at the Guns and Butter Archives, scroll down to January
21st 2004 and January 28th 2004, it is well worth listening
to. |
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Why
Did the World Trade Center Collapse? Science, Engineering,
and Speculation
Thomas W. Eagar and Christopher Musso
There have been numerous reports detailing the cause
of the World Trade Center Tower collapse on September
11, 2001. Most have provided qualitative explanations;
however, simple quantitative analyses show that some
common conclusions are incorrect; for example, the steel
could not melt in these flames and there was more structural
damage than merely softening of the steel at elevated
temperatures. Some guidelines for improvements in future
structures are presented. Learn
More
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Observations
of paint cracking due to thermal expansion. Of the
more than 170 areas examined on 16 perimeter column
panels, only three columns had evidence that the steel
reached temperatures above 250 ºC: east face,
floor 98, inner web; east face, floor 92, inner web;
and north face, floor 98, floor truss connector. Only
two core column specimens had sufficient paint remaining
to make such an analysis, and their temperatures did
not reach 250 ºC. ... Using metallographic analysis,
NIST determined that there was no evidence that any
of the samples had reached temperatures above 600
ºC. (p 90/140)
The highest temperatures estimated for the samples
was 250 ºC (482 ºF). That's consistent with
the results of fire tests in uninsulated steel-framed
parking garages, which showed maximum steel temperatures
of 360 ºC (680 ºF). How interesting then,
that NIST's sagging truss model has the truss heated
to 700 ºC (1292 ºF). Learn
More --- NIST
Final Report PDF
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Minoru
Yamasaki, architect and designer of the WTC, had been
reported saying "We designed the towers to take
multiple 707 jet strikes." Some have falsely stated
that this statement was made after (and in reference
to) the collapse of the towers. This is clearly not
true though, because Minoru Yamasaki died on February
6, 1986. Learn
More |
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Underwriters
Laboratories Executive Speaks Out on WTC Study "The
buildings should have easily withstood the thermal stress
caused by pools of burning jet fuel." - Kevin Ryan
Read
More
06/12/2005: 9/11 Whistle blower Kevin Ryan, former Underwriters
Laboratory Executive speaks out about the US government's
official hypothesis on how the WTC towers came down.
Read
More |
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NIST
for further investigation |
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University
of Manchester (UK) professor of structural engineering
Colin Bailey said there was a lot to be gained from
visualising the structural response. "NIST should
really show the visualisations, otherwise the opportunity
to correlate them back to the video evidence and identify
any errors in the modelling will be lost," he said.
Learn
More |
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