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Politics : GOPwinger Lies/Distortions/Omissions/Perversions of Truth -- Ignore unavailable to you. Want to Upgrade?

To: TigerPaw who wrote (46842)	5/16/2005 3:25:06 PM
From: Wayners	Read Replies (1) \| Respond to of 173976

The WTC indeed were supported by their exterior columns, like a tube. Now imagine removing a section of that support tube from a blast. The lack of support collapses one side of a tower by one or more stories. Now there is an overturning moment/force couple between the weight of the building at the center of gravity and the resultant reactions from the remaing columns at the exterior of the tube. The remaining columns would now be in tension from overturning moment. If those columns were then to fail in tension, the building then topples over. Horizontal shear on the remaining columns..it would be like having the building sitting on a ramp, and whether it would slide of the ramp. Without knowing a lot more information, it would be difficult to see what the tension forces or shear forces would be on the columns and what those columns strenths or allowble tensile stresses really were.