Hi Roundhead,
I've taken the liberty of breaking your compound question into reasonable clauses.
Certainly. My history lesson proves that thermal expansion is a well-known physical phenomenon and has been for a long time. It's a response to attempts by other posters to imply that thermal expansion was instead a concept newly fabricated by NIST.
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The reason wtc7 was the first building to fall victim to "this scourge" (if indeed it was, rather than simply the first for which the contribution of thermal expansion was recognized) is that it can only happen in a structure that is designed to take advantage of various fire safety systems such as sprinklers, heat-resistant coatings, and fire departments (for instance, it would not happen in a structure designed for fire safety through compartmentalization) but for which those systems fail or their limits are exceeded, AND when various factors such as the length of spans, the locations of fires on multiple floors, and a column carrying an unusually large proportion of the total load all align to create a vulnerability.
I haven't read the wtc7 report yet, so I don't know what physical tests they conducted. However, I would not be surprised if they did not perform tests to directly determine the thermal expansion coefficient of steel, as that data is available in any engineering handbook of physical constants. (They probably didn't conduct their own tests of the strength of earth's gravitational field either.)
Where did they state that they came to an illogical conclusion?
Or is that your claim? In which case you're welcome to provide evidence (or at least a coherent rantionale) for it.
Please support this claim by specifying these other options, in comparable detail to what NIST explained about its conclusions at the press conference. Include the causes and the actions of the underlying physical processes, the specific structural members affected, and the rationale for how those phenomena account for the observed behavior of the building.
Respectfully,
Myriad
The building collapsed at virtually free fall speed. Several studies have been done(Including by Legge)which show from observing a certain point of the building as reference, and timing and calculating its speed, it was "virtually" free fall speed. It fell though basically air, through the path of MOST resistance, the structure itself.
Billowing clouds of dust are a characteristic of CD.
Controlling the rubble pile by pulling in the exterior columns to fall inward, are evidence of a sucessful CD
The kink in the Penthouse is a telltale sign of symetrical widespread interior column failure.An attribute of a sucessful demo, and easy to note on demo videos for a comparison.
Reports by witnesses state the bottom floor was blown out prior to the onset of destruction.This characteristic is common on demo's.
Witnesses state the building was cordoned off and the collapse expected as early as 3:00 in the afternoon. This is always done prior to a demo, its collapse is expected and the area is cleared.
Pile debris was removed prior to researchers being able to study it.This IS done on a CD because the cause is already known, no reason to examine the pile.
Deputy Chief Hayden:"It came down about 5 o�clock in the afternoon, but by about 2 o�clock in the afternoon we realized this thing was going to collapse".
Emergency worker:it was horrifying... about a second later the bottom floor caved out and the building followed after that... we saw the building crash down all the way to the ground... we were in shock." - 1010 WINS NYC News Radio
Rescuer 3: "The building is about to blow up. Move it back!"
"We are walking back. There's a building about to blow up. There's flame and debris coming down."
The buildings collapse, if it was a CD, in the aftermath did exactly what a designed CD should do. In other words, building 7, in aftermath, looks exactly like what a Cd should look like, if sucessfull. Symetrical, no or virtually no collateral damage, neat tidy debris pile.
7 exhibited all of the features of a CD, nothing doesnt fit, it displays all the signature characteristics.
In short
7 looks exactly like a cd
It demise was predicted ahead of time
Its rubble was removed before researchers could study it(and removed by cd company)
It, if not a CD(cd's are of course a common occurance)would have to be explained away as something that isnt a common occurance, but would still feature all the same characteristics)
This hasnt been done.
Asymetrical damage doesnt agree with complete and symetrical near freefall failure.
No metal from the supposed failure area has been studied to support this "anti theory" of fire being the only cause.NO PHYSICAL EVIDENCE SUPPORTS FIRE AS A CAUSE, of the building being pulverized and destroyed
Where are multiple, huge concrete floor pieces in the rubble. Much as an eathquake can bring a building down, and photographic evidence shows it leaves large pancaked floor sections visible in the rubble, 7, if falling down only because of fire, should mimic this attribute, as both are in fact gravity collapses, and fire doesnt pulverize concrete. This is an extremely important point. Fire damage and earthquake damage should result in similar loking debris piles with intact or semi intact piles of floors visible.
Fire has never before brought down completely a steel framed building, and many have been on fire, longer, and more widespread.
The collapse was predicted, in spite of the fact the ultimate explanation for the buildings demise was a first time in history failure, that nobody in the city could have possibly have thought of in a historical perspective.
If it was a CD, its perfectly logical to predict demise ahead of time, and get people back and rope it off, in fact its normal.
If its fire alone, its illogical to predict demise, there is no precedent.
There is overwhelming evidence to state that CD is the cause regarding 7. Its fits the video evidence perfectly, it fits the resultant debris pile perfectly, it would explain why its demise was predicted ahead of time perfectly, and would also explain why its rubble was not studied, if CD was trying to be hid as the culprit.
