Comment: Several statements you make are simply not true

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Several statements you make are simply not true

Steel does not melt at the temps you state, it is actually much higher than 1300F, about 2200 if I ember correctly. Steel does however lose a lot of its strength at around 1200F as the heat expands the carbon lattice structure in the alloy which reduces strength and hardness signifcantly (about 90%)

Materials in the building could definitely have burned at 1200F, a standard wood buring stove can reach temps of 1100F, and that is with the air supply intentionally restricted. Give kerosene plenty of air and it will indeed burn at 1200F. Consider the building as a stove, and the center stair column as a big chimney at least 500' high, and normal wind velocities at the roughly 1000' altitude where the planes struck....there was plenty of air, almost a blast furnace actually. This is why materials continued to come out of the buildings and fall to ground long after the planes hit, nmuch of the paper and debris was simply being blown out of the buildings by the wind.

Josh Brueggen
Jack of all Trades
Precinct Commiteeman Precinct 5 Rock Island Co Illinois