Just checking in. How's it going.
no concrete core just steel columns!
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no concrete core, just steel columns, as you can see steel column core, the floor, and the sides.
guess your super web site will have to be revised, the story you have was wrong as you can see,
no rebar except on the floors, there is rebar size rods in the floor, those are the things all ripped up in your photos of no concrete core just steel core you keep posting over and over again!
Yes, there was no structural concrete other that that used in the foundation and the floor pans.
The concrete in the floors was estimated at around 3 million pounds per level, which may explain why the pancake theory for the collapses was trotted out in less than a week.
But then, it failed to explain why the walls and central column failed as observed, so a few more attempts were made.
If it wasn't for the collapse speeds being so similar, despite the differences in the applied forces and initiations, I probably wouldn't have a lot of trouble wrapping my mind around the official explanations.
As many people saw, the upper 35 floors of the South Tower tilted to over twenty degrees, an event which should have continued and broken through the damaged central core. Instead of toppling over, all four walls suddenly began to collapse, carrying the upper section straight down, as though it was on an express elevator. The core could occassionally be seen through the smoke and dust, but only long enough to see it crumble as well.
These core columns were three feet by one foot, and over two inches thick; and there were 47 of them in each tower, so anything that could damage them that thoroughly is pretty impressive.
The dust cloud generated was also amazing. Apparently the concrete in the floor pans was being pulverized as the building fell, not when it hit the ground. That whole process was over in less than ten seconds. I think FEMA had it clocked at 8.5 seconds. I'll have to look that up again. It works out to over 7 floors per second, starting at the collapse point.
The North Tower collapse was even more amazing, because it began around the 100th floor. I watched a few different videos several times, and each time, just as the antenna mast sank into the roof, the area around the 100th floor began to compress, and then that whole section just came straight down, tossing sections of steel wall out in all directions.
It was like the wall were made out of particle board. I would have expected the upper 10 floors to be destroyed by the impact at the same rate as the rest of the structure, but it just kept rumbling down. I guess the equal and opposite reaction thing doesn't apply for collapsing buildings.
If the steel hadn't been rushed off to Asia without a thorough forensic analysis, the government would look so suspicious.
So I can see why a lot of people around the world are continuing to ask questions and call for further investigations. I'm also not surprised that they don't want the investigations to be run by the Bush Administration.
As for the question about why so many physicists and engineers are going along with whatever the official story of the month is, just consider how important it is for universities and corporations to be on the good side of government. Endowments and contracts are not easy things to come by.
Oh, and nice job on this thread. Over 150 pages. That's more than they have on Colbert's blog.
