Quote:
Originally Posted by Fanu
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The steel in that video is only 1 inch thick, not exactly the size of an exterior or core column in the WTC. Also notice how the steel needed to be heated to about
980 degrees celsius to bend. There's no proof of the WTC steel actually reaching those temperatures. The evidence actually shows that the steel never reached that high of temperatures. Furthermore, only certain areas would be heated to high temperatures, not the entire building, the rest would have near 100% strength and be cold steel.
The following information is taken from
NIST, Federal Building and Fire Safety Investigation of the World Trade Center Disaster: Mechanical and metelllurgical Analysis of Structural Steel.
FOR WTC TOWERS:
"Finally, in the several columns with known pre-collapse fire exposure, metelllographic
analysis provided no conclusive evidence that the steel exceeded 625 Degrees Celsius, based on calibration in furnace exposure studies of WTC steel reported in NIST NCSTAR 1-3E." page 99
Fire Exposure of
Exterior Panel Sections: "
NO steel was recovered which experienced temperature excursions above 600 degrees celsius for any significant lenght of time as a result of the pre-collapse." page 101
Fire Exposure of
Core Columns: "The
columns did not exceed 250 degrees Celsius." page 101
FOR WTC 7:
"Although
NO steel was recovered from WTC7, a 47-story building that also collapsed on September 11, properties for steel used in its construction were estimated based on literature and contemporaneous documents"- page: abstract iii
Also... The first tower to collapse was only exposed to heat for 56 minutes...
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