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[–] WedgeSerif 61 points 46 points (+107|-61) ago 

Fire did not "melt" steel beams. It softened them. If you'd paid attention in your high school chemistry class, you would know that a single atom or molecule has a melting point, but a mixture of substances does not. Steel is a mixture (alloy) of iron, carbon, and tin. As it heats, it softens, like candle wax. If you look at photos of the debris at Ground Zero, you'll see steel beams twisted and bent as if they were made of clay.

The way the Twin Towers were designed contributed to their collapse. Each tower was basically a hollow steel tube with another tube containing elevators running up the middle. Each floor was supported by cleats attached to these tubes. As the fires raged, the cleats and their supports softened, leading to the failure of one floor. Again, because of the buildings' design, when one floor collapsed, the weight of the building was transferred to the other floors, which were also being weakened by the burning jet fuel. A positive feedback loop then commenced, with each floor failing more quickly than the last due to the increasing stress put on them. Finally, the stress was too much for the building, and the entire structure failed.

The building in London wasn't nearly as tall/massive/heavy as the Twin Towers, and it had a more internally stable design than could withstand the stress the fire put on it. It also, from what I could tell, had a significant amount of concrete in its construction, which the Twin Towers did not.

Or, you could just be a retard and blame the Jews.

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[–] dkyuss 17 points 54 points (+71|-17) ago  (edited ago)

Specifically we are talking of WTC 7 that was not hit by planes. No jet fuel.

Memory refresh https://youtu.be/nc9Xad6ooPo?t=25s

Now try again.

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[–] SuperConductiveRabbi 17 points 8 points (+25|-17) ago 

It was hit by debris and was engulfed in flames for hours. An entire face of the building was missing. (Which, by the way, destroys the theory that the WTC "collapsed in on itself." Massive debris were thrown everywhere by both the collisions and collapses.)

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[–] Synthicide 8 points 7 points (+15|-8) ago  (edited ago)

Maybe WTC 7 collapsed because it was bombarded with giants chunks of a colossal building falling on it.

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[–] o0shad0o 4 points 0 points (+4|-4) ago  (edited ago)

The reason WTC 7 failed from the bottom is almost half of the bottom two ten floors was a giant room containing an electrical substation, backup generators and diesel fuel tanks to run them.

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[–] NotAnOctopus 24 points -10 points (+14|-24) ago 

Where in his reply did did he say anything about jet fuel? Sorry but his answer is spot on.

Now try again.

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[–] TeranNotTerran 5 points 41 points (+46|-5) ago 

I must be retarded for thinking the free fall speed of the collapse was suspect. Or for being curious about Bush's brother getting the security contract for the building weeks before. Or for the debris being shipped off as soon as possible.

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[–] somefuckingguy15 8 points 36 points (+44|-8) ago 

Or the owner silverstien taking out a large insurance policy against the building two weeks before.

Or the fact that it happened while all the Jews were out of the building for a holiday.

The coincidences line up.

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[–] ShineShooter 0 points 2 points (+2|-0) ago 

Here's a gif of the moment.

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[–] 9516060? 1 points 2 points (+3|-1) ago 

What about ol' (((lucky larry)))

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[–] illuminalto 1 points 1 points (+2|-1) ago 

You're not retarded, you're looking at a shill.

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[–] Banned4Truth 6 points 16 points (+22|-6) ago 

. A positive feedback loop then commenced, with each floor failing more quickly than the last due to the increasing stress put on them. Finally, the stress was too much for the building, and the entire structure failed.

What bunch of malarkey. Positive feedback loop? lol Each floor should have subsequently slowed down the initial collapse as the kinetic energy is dissipated with each collapse past the impact zone and fires. Buildings are designed to stand, not fall.

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[–] Crux 2 points 5 points (+7|-2) ago 

It is actually called the collapsing principal. It is how martial artist break a bunch of bricks so long as there are spacers between them.

[–] [deleted] 0 points 0 points (+0|-0) ago 

[Deleted]

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[–] Robobob 12 points -7 points (+5|-12) ago 

Wrong

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[–] BigBlackSpook 12 points 11 points (+23|-12) ago 

Fuck off, your nose is comming through my monitor