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sethnintendo said:


Okay say the jet fuel did weaken the steel enough.   Do you really think that the steel would be weaken on all sides of the building evenly to have the buildings collapse onto themselves perfectly.  To me it would seem that the side that got hit would make the building topple over from that side.  However, according to you and the official explanation all the sides must have burnt and weakened the steel evenly.


The steel weakens the most where the fire is strongest, these beams can no longer bear load. Extra load is therefore put on surrounding load bearing beams. This eventually causes mass collapse in the direction of the force acting upon it - gravity acts downwards not sideways.

The actual physics behind the collapse are well explained

http://www.civil.northwestern.edu/people/bazant/PDFs/Papers/466.pdf

You clearly have misunderstandings of 'the official explanation' and the physics involved if you think that for a building to collapse upon itself all sides must have been equally weakened.