No, but heat WEAKENS it and fire DOES produce heat you know. Heat can weaken steel to a point that it fails. Were you aware of that?
Can you answer a simple question for me? If steel can't catch fire (like I apparently thought it did

), can you explain why they put fireproofing on steel beam and columns?
even a guess would suffice at this point.
I am well aware of the properties of steel...and the temperatures and durations of the fire are not sufficient to cause such a collapse or to create molten metal...thermal cutting however would explain both...
If there were steel core columns in the core, which there weren't as can be seen here in the area to the right of the fince, lightly arced vertical elements,
Thermite cutting of vertical surfaces is very difficult and requires a fixture. Such a fixture requires access to all faces of a box column. It surrounds the box column creating a vessle for the thermite which is liquid when burning. It will quickly penetrate, but it must sit in a very undisturbed mass, for the entire time, or penetration will not remain focused and the severing operation is compromised.
When such cutting is done a substancial amount of over kill is calculated in which essentially makes an event where a considerably larger amount of steel is melted, than actually needs to be cut. With that much molten steel, a lot of it from the upper elevations downwards, is going to be falling and flipping all over the place. Be cognizant of the claim of 47 columns, the fact of aprox. 40 foot pieces around GZ, = 1,300 cuts. Molten blobs of steel will be randomly scattered around the building for over a hundred feet.
We did not see any of that. Nor did we see any column cut in such a way at GZ. The appearance is very distinct, rounded, not linear, as the molten thermite leaves the vessal and applies its burning mass with gravity on the steel. It begins to fall along the plane of the box column wall. Messy.
Do we see any molten steel here?
No, we see a massive and amazingly uniform debris wave of sand, gravel and concrete.
Geeeeeeeeeeeeee, I wonder where all that came from?
The nano thermite explosive is a strict fantasy.
http://i224.photobucket.com/albums/dd121/88Badmachine88/IH1.jpg
Ordinary high density, high explosives were used everywhere above ground.
Here is the delay and detonation pattern at the towers on 9-11. Who knows enough to identify what kind of an auditory quality it has and why?
Here is a comparison to the most dense, practically, and fastest used in a
[ame="http://youtube.com/watch?v=tZRAbUcUkIc"]Linear shaped charge[/ame]