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Originally Posted by balderdash111
WTC was hit by one of the WTC towers as they collapsed, so it was not just fire. Most of the pics you see are from the north, which faced away from the towers, so you do not see the damage on the south side.
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In 1991 One Meridian Plaza in Philidelphia (38 floor building) burned for 18 hours and gutted 8 floors. Building 7 collapsed at 5:20pm eastern time, not 6 hours after firefighters were alerted to fires in the building (the building is estimated to ahve caught fire roughly an hour after the second strike). Compare these two events. The One Meridian fire was substantially larger than the fire in WTC 7, and it burned longer. Yet not only did the Philidelphia tower not implode and collapse in 6.5 seconds, it did not collapse at all. Who said that one of the towers hit the WTC 7?
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Originally Posted by balderdash111
See above. (And I recall seeing detailed schematics of WTC 7 floor plans in at least one report from the feds, so I'm not sure what your point is on floorplans being classified....other than adding a layer of spookiness)
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You had them before they were classified. i called about 6 months ago and they will not release them anymore. Your source had them before this classification was in place. No spookiness about it.
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Originally Posted by balderdash111
we've been through this before. A rigid structure would tip over if the support were taken out from one side. Like a tree being chopped down.
A building is not a tree. It collapses upon itself if it fails.
I'm not an engineer, but I suspect Martian is right when he says they are designed to do this.
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Buildings are partially flexable and partially rigid. I've never seen a building touch the ground during a severe wind storm, but I have seen them sway. What we are talking aobut is degrees of flexability versus rigidness. The building is made from a steel structure that takes quite a bit to bend, and steel supports CAN SNAP when put under enough pressure. The problem is that the rigidness claim doesn't hold up. If the structure of the building was as flexable as you claim, what's to stop the supports on the opposite side of the building BEND and the building falls onto one side? This is all moot of course, because steel can't be melted by airplane fuel, and therefore the structure should have not given at all - whether snapping or bending.
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Originally Posted by balderdash111
I don't believe the top did collapse first. I assume you are referring to the slight drop in the antenna before the building collapsed to suggest that the top fell first. But wouldn't that also be consistent with the central core beginning to collapse somewhere near the impact, thus lowering all of the structure resting upon it?
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These puff lines are above the airplane entry hole. This isn't just the antenna falling. The upper floors poofed first. Poof lines (forgive me I don't know the technical term) can only be formed when the floor below is solid, othewise the necessary compression wouldn't be enough to blow out smoke, dust and debres.