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Politics : Bush-The Mastermind behind 9/11? -- Ignore unavailable to you. Want to Upgrade?

To: TigerPaw who wrote (16055)	9/20/2006 12:29:05 AM
From: David Howe	Respond to of 20039

<<< When the truss sagged it no longer acted as a brace for the side walls, but instead actually began pulling the walls inward. The walls were already damaged and parts of them were getting hot too. This eventually led to the outer walls being pulled in as a kink at some point, and then the upper part of the building was no longer supported. >>> Good explanation. I was oversimplifying how the joists (trusses) affected the columns as they deformed (sagged). Actively deforming the columns is an even more logical explanation than simply disconnecting and removing horizontal bracing of the columns. The picture gets clearer and clearer.