can a jet fuel fire ment steel at 650 degrees?

Question

911 study

Answer 1

Yeah, the national geographic channel had a good documentary on 9/11 recently. It showed how the steel reinforcements buckled and softened from the heat, leading to their inability to hold the weight of the top 20 or 30 floors of building above them. They didn't melt, but rather were tremendously weakened.

Answer 2

No, not hot enough. But it was enough to remove many supporting structures and the resulting weight caused the collapse.

Note that in the past, say 40 years ago, that buildings were 'over-built' and could withstand tremedous damage and remain intact.

Today, money saving is the prime goal, and 'just-enough-material' to be safe if nothing happens is usually the result.

I remember that during WWII, aircraft flying the run to Germany would endure manys hits from ground-fire, some even loosing large sections of wing of tail, yet flying back to England and landing somewhat safely.

Today, an aircraft will crumple like a soft-drink can if any structural member should fail.

Answer 3

FACT: Jet fuel burns at 800° to 1500°F, not hot enough to melt steel (2750°F). However, experts agree that for the towers to collapse, their steel frames didn't need to melt, they just had to lose some of their structural strength--and that required exposure to much less heat. "I have never seen melted steel in a building fire," says retired New York deputy fire chief Vincent Dunn, author of The Collapse Of Burning Buildings: A Guide To Fireground Safety. "But I've seen a lot of twisted, warped, bent and sagging steel. What happens is that the steel tries to expand at both ends, but when it can no longer expand, it sags and the surrounding concrete cracks."

"Steel loses about 50 percent of its strength at 1100°F," notes senior engineer Farid Alfawak-hiri of the American Institute of Steel Construction. "And at 1800° it is probably at less than 10 percent." NIST also believes that a great deal of the spray-on fireproofing insulation was likely knocked off the steel beams that were in the path of the crashing jets, leaving the metal more vulnerable to the heat.

But jet fuel wasn't the only thing burning, notes Forman Williams, a professor of engineering at the University of California, San Diego, and one of seven structural engineers and fire experts that PM consulted. He says that while the jet fuel was the catalyst for the WTC fires, the resulting inferno was intensified by the combustible material inside the buildings, including rugs, curtains, furniture and paper. NIST reports that pockets of fire hit 1832°F.

"The jet fuel was the ignition source," Williams tells PM. "It burned for maybe 10 minutes, and [the towers] were still standing in 10 minutes. It was the rest of the stuff burning afterward that was responsible for the heat transfer that eventually brought them down."

Answer 4

Can somebody holding a hand held torch burn a hole through steel... Yea , ask any welder!!!! Get over it .. 9/11 was not a conspiracy and NO GW did not use satellites to send Katrina to New Orleans and NO chocolate milk does not come from brown cows........

Answer 5

Irrelevant. The steel in those buildings wasn't melted. It bent. When the four corners came apart, gravity took over.

Answer 6

Steel melts at about 1400K but at 40% of this temperature it becomes plastic. so yout 650º becomes 923K which at 66% of its melting point would make the steel very soft ans unable to bear weight.

Answer 7

Heat (I would imagine it more with all the combustables being burned)+ weight caused the steel to bend, resulting in collapse.

Answer 8

Maybe you should study how a furnace works.

Answer 9

MIT graduates have this to say:

http://www.sciam.com/article.cfm?articleID=000B7FEB-A88C-1C75-9B81809EC588EF21&pageNumber=1&catID=4

Answer 10

no but explosives help. yippee mossad and u.s govt