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Politics : Bush-The Mastermind behind 9/11?

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To: Rock_nj who wrote (15876)9/18/2006 11:46:16 AM
From: Don Earl  Read Replies (2) of 20039
 
PS. RE: "Demolition professionals always blow the bottom floors of a structure first, but the WTC tower collapses began at the upper levels, where the planes hit the buildings."

Actually, this isn't true. How they blow a structure depends on the structure. The King Dome in Seattle would make a good example of where sideways blasts were used to create a sort of domino effect.

A question in the back of my mind for a long time is if it would even have been possible to implode buildings as tall as the twin towers from the bottom up? You have that massive core built to resist huge shear forces. The debris at the bottom would pile up quickly and irregularly. And if the central core got hung up even a little bit, the building would start to fall sideways.

My guess is the buildings were brought down the only way they could have been, and that the bottom up method wouldn't have worked on quarter mile tall, tower type buildings.
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