Vote
15 Total Votes
There are two reasons;
1. The planes hit the towers at high speeds lowering the structural integrity of the building.
2. The jet fuel caught fire and caused an explosion in the tower itself which in turn caught fire.
It was not just one reason.
Structural Steel does not catch fire, plus, there was molten Steel at the site.
I can understand a Fire Raging, but that will not bring down a building held up with Structural Steel.
How long would it take a fire to travel 'downwards' to affect the strength of a metal building?
In the surrounding area, there were cars which had their paint and metal scorched. However certain materials were intact, such as the sirens on the police cars, which would melt at a lower temperature then metal.
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