I_Dont_Know859
Hoo-ah!
Spiritshotgun said:Apparently, you don't realize that planes have been crashing into buildings for years yet not a single one of them has fallen, the same is said for the empire state building, same situation, it did not fall. the twin towers were built to withstand occurances shuch as 9/11, buildings do not collapse in on themselves in a convenient little pile, that only happens during a demolition, which is what 9/11 was. An excuse for george jr to finish what his daddy started. A plane does not bring a building down.
I believe from my research that the planes did cause the building to collapse. Simple facts of temperatures are:
1) 1535ºC (2795ºF) - melting point of iron
2) 1510ºC (2750ºF) - melting point of typical structural steel
3) 825ºC (1517ºF) - maximum temperature of hydrocarbon fires burning in the atmosphere without pressurization or pre-heating (premixed fuel and air - blue flame)
Diffuse flames burn far cooler.
Oxygen-starved diffuse flames are cooler yet.
The fires in the towers were diffuse which means they were well below 800ºC.
Their dark smoke showed they were oxygen-starved particularly in the South Tower.
The towers steel frames didn't need to melt because the towers collapsed by losing some of their structural strength which and that required exposure to much less heat. Lots of twisted, warped, bent and sagging steel was found at the site. This results when steel tries to expand at both ends, but when it can no longer expand, it sags and the surrounding concrete cracks. Thus making the building unstable. This is just my conclusion of course, just food for thought.