Quote:
Originally Posted by Vulcan
How I understand it is the first two towers imploded because the airplane and explosion took out the centre columns. The damage on tower 7 was one side only, which should result in falling to one side or at least twisting. This didn't happen so they're claiming it was the heat of the fire that weakened the connections. This iron is covered with flame ######ant plus the sprinkler systems should have come on. The only people I might listen to for an explanation would be demolition experts who take great pains and months of work to make a controlled implosion but this just happened all by itself.
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Twisting and falling to one side simply will not happen with a building of that weight that is built the way it was. Like other people said, this isn't a Jenga tower, its a massive building that weighs many many tons.
The way the building was built if you take out one support structure the other collapse under the weight. So the side structure was damaged by the debris. Then the inside structures eventually became warped due to fire. The building then collapsed.
For the record the building did not entirely collapse in a controlled fashion. It severely damaged other buildings around it.
"When 7 World Trade Center collapsed, debris caused substantial damage and contamination to the
Borough of Manhattan Community College's
Fiterman Hall building, located adjacent at 30 West Broadway, to the extent that the building is not salvageable. As of August 2007, Fiterman Hall is undergoing deconstruction.
[51] The adjacent
Verizon Building, an
art deco building constructed in 1926, had extensive damage to its east façade from the collapse of 7 World Trade Center, though was able to be restored at a cost of US$1.4 billion."
I know its wikipedia, but the sources it links are pretty solid.