One of the only things that NIST actually came up with that wasn't a part of the Bazant and Xhou theory,was it's claim that the sagging of the floor trusses pulled the outer columns inward and this started the buckling of the columns.
They tried to validate this theory by putting floor trusses to furnace tests that were run by Underwriters Labs..it was a failure as the NIST testing showed that the trusses would not have sagged and deformed enough to have had this effect at all.
They actually over exageratted the sagging a lot just to make it fir this theory/guess.
This particular bowing, and what you keep harping on about was easily disproved by
simply looking at the videos. The videos show that the antenna on the roof dropped
before even the edges of the roof did, and the antennae were held up by the core
columns.
What this signifies is that the core columns failed before the wall columns did. It also suggests that the hat truss, that connected the core to the wall columns, was severed very quickly at the beginning of the collapse, something that "fire" certainly could not have done.
Looking at the movement of the roof of WTC 1 it shows that it started its downward acceleration apparently with no slow movement, no slow sagging characteristics as one would expect to see if the steel were being slowly damaged and approaching its failure point by fire.
When you say "easily" have ejected those beams..You don't seem to understand that those "beams" were actually outer perimeter columns that weighed 100's of tons and were ejected laterally for great distances. Fire damages steel slowly, it takes time. Not all the building was damaged. The lower portions were constructed of larger, thicker components, that physically should have provided enough resistance to cause significantly longer duration times of collapse and not a mere few seconds short of actual FF.
The crushing effect of the top, according to the NIST/Bazant theory, is said to have easily overcame the more robust and undamaged sturdy lower parts, without so much as having any resistance to overcome.
Physicists have taken the videos of the tower, specifically the top damaged parts and analyzed it and applied measurements, and calculations, that show it essentially did not hesitate AS IT WAS COMING DOWN THROUGH THE UNDAMAGED BUILDING, and instead showed a constant acceleration that was measured.
FF of the towers was said to have to be 417meteres or (1,368 ')
417 meters =0.5 gt^2
=9.22 SECONDS
and we have estimates that range from 10 seconds in the 9-11 commission report, to 10 -15 secs. in other estimates. This is said to not be physically possible as the upper block, had parts of it that were turning into dust, and parts were flying off of it AWAY from being part of the crushing down upper mass.
The upper part had to overcome the initial resistive forces of the lower. This would have been visibly noticeable. It was not.
NIST did not bother to explain what happened to the WTC after so called collapse initiation. They simply state collapse was inevitable without even providing any scientific data to back up this assertion...And you people side with an unproven guess that has no data??
Another interesting tidbit about the NIST/Bazant theory is that it was written 1-2 days AFTER the "collapses". This is a suspiciously fast time to gather your evidence, do your calculations, and come up with a thesis. There are many things that have been shown wrong about this theory that NIST attached itself to provided in the link I posted and that Dawgshit made a fool of himself over LOL!
