reply to post by pteridine
"The duration of (air, not steel) temperatures near 1000 degrees C was about 15 min to 20 min. The rest of the time, the calculated temperatures
were near 500 degrees C or below." (NIST, 2005, p. 127, emphasis added.)
"NIST contracted with Underwriters Laboratories, Inc. to conduct tests to obtain information on the fire endurance of trusses like those in the WTC
towers...All four test specimens sustained the maximum design load for approximately 2 hours without collapsing." (NIST, 2005, p. 140, emphasis
added).
You may read more here:
wtc7.net...
If you're going to attempt to bring up the pictures of rescue workers looking at molten metal, Steven Jones states, within the article, that he is
not sure whether they are looking at molten metal or a work light.
Maybe something like this:
"the empirical test results established that this type of assembly was capable of sustaining a large gravity load, without collapsing, for a
substantial period of time relative to the duration of the fires in any given location on September 11th." (NIST, 2005, p. 141).
NIST, in their "Final Report," does not address the rapid (free fall) and symmetrical collapse of the buildings. Nor does it make mention of the
North Towers' antenna dropping first.
In regards to Molten Metal...
"They showed us many fascinating slides ranging from molten metal which was still red hot weeks after the event, to 4-inch thick steel plates sheared
and bent in the disaster." (Structural Engineer, September 3, 2002, p.6).
"In the first few weeks, sometimes when a worker would pull a steel beam from the wreckage, the end of the beam would be dripping molten steel,"
Fuchek said. (Walsh, 2002).
Also from NIST:
"12. Did the NIST investigation look for evidence of the WTC towers being brought down by controlled demolition? Was the steel tested for explosives
or thermite residues? The combination of thermite and sulfur (called thermate) "slices through steel like a hot knife through butter."
NIST did not test for the residue of these compounds in the steel.
The responses to questions number 2, 4, 5 and 11 demonstrate why NIST concluded that there were no explosives or controlled demolition involved in the
collapses of the WTC towers.
Furthermore, a very large quantity of thermite (a mixture of powdered or granular aluminum metal and powdered iron oxide that burns at extremely high
temperatures when ignited) or another incendiary compound would have had to be placed on at least the number of columns damaged by the aircraft impact
and weakened by the subsequent fires to bring down a tower. Thermite burns slowly relative to explosive materials and can require several minutes in
contact with a massive steel section to heat it to a temperature that would result in substantial weakening. Separate from the WTC towers
investigation, NIST researchers estimated that at least 0.13 pounds of thermite would be required to heat each pound of a steel section to
approximately 700 degrees Celsius (the temperature at which steel weakens substantially). Therefore, while a thermite reaction can cut through large
steel columns, many thousands of pounds of thermite would need to have been placed inconspicuously ahead of time, remotely ignited, and somehow held
in direct contact with the surface of hundreds of massive structural components to weaken the building. This makes it an unlikely substance for
achieving a controlled demolition.
Analysis of the WTC steel for the elements in thermite/thermate would not necessarily have been conclusive. The metal compounds also would have been
present in the construction materials making up the WTC towers, and sulfur is present in the gypsum wallboard that was prevalent in the interior
partitions."
NIST did not even check.
Yours,
THE AQUARIAN 1