dadams2k11
ID10T Error
Very interesting.Maybe designed to be hit by an aircraft full of fuel at combine 250 tons but not the likelihood of 2000 degree heat from the fires caused the steel structure to fail. Steel bends at around 300 degrees but melts at 1300 degrees. It would have been a furnace inside there directed through the lift shafts directly down. A number of people died on the ground floor immediately after the impact due to fire balls down the shafts.
Also you need to be reminded a building is designed by humans, especially back then, they can only calculate for eventualities, what happens in reality can be very different.
What happened in the aftermath is very much debatable.
Why did WTC7 collapse?