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[–] KnightsofHubris 1 points -1 points (+0|-1) ago 

The buildings did withstand the plane impact. They did not withstand the fire. The spray on foam fire retardant is brittle and the plane crash would have stripped the coating off. Bare steel does not do well in fires.

[–] GoodGodKirk 0 points 1 points (+1|-0) ago 

Wut? Are you an engineer? The metal used for the buildings can withstand the fires of jet fuel, especially when encased in cement.

It could weaken the metal, which may bend, but that doesn’t explain the tower falling on itself rather than falling to the side where the support was weakened.

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

Wut? Are you an engineer? Not an engineer but I looked into this pretty deeply, reading comments from some real deal scientists.

Jet fuel did not bring the building down, an ordinary office fire did. The jet fuel probably burned out within 10 minutes. What the jet fuel did do is immediately cause an enormous fire, this is not how normal building fires start.

It's very very well known that steel weakens in fire when unprotected. In Civil War when the Union Army wanted to deny the Confederates the use of the railroads, they would make "Sherman Neck Ties" by heating railroad rails in a campfire and then bending the soft metal around a tree.

https://civilwartalk.com/attachments/sherman-destroying-railroads-jpg.159180/

This image is from a fire test done on an office. The upright columns were protected and the horizontal beams were not and as we can see the beams bowed in the heat. https://www.steelconstruction.info/images/4/42/Cardington_fire_test_afterward.png

The metal used for the buildings can withstand the fires of jet fuel, especially when encased in cement.

This is not how the WTC towers were built. The core of the WTC was steel not concrete. They used spray-on foam fire retardant rated for 2 hours I believe. The Rockefellers wanted giant open office spaces without massive concrete encased columns everywhere. This is was the usual way skyscrapers were built and one reason why the Empire State Building survived the plane crashing into (another was it was a much small plane going much slower) The ESB had tons of concrete and was a much heavier building per square foot. The architect's solution to this was move the interior columns to the center of the building to create a very strong core supporting about 60% of the building's weight. And then put a lattice of thin columns all along the outside of the building. This perimeter columns supported about 40% of the weight. The core columns were so strong, you can still see then standing for like 10 seconds after the clouds of dust pass.

http://911review.com/errors/wtc/imgs/site1074.jpg

but that doesn’t explain the tower falling on itself rather than falling to the side where the support was weakened.

The tower would not fall over on it side. There's no force strong enough to make it tip over. The tops of one of the towers was leaning before collapse but fell straight down because by that point gravity was the strongest force working on it. The Tower was a system of millions of parts and it got its strength from all this parts working together and this system is intended to be strong in a vertical direction. It would not tip over, because it would break apart long before then just due to gravity.

The full collapse of the towers was long and slow. There was plenty of structural damage before the final collapse. When the planes smashed in, they severed many perimeter columns and some core columns. The building still stood because of redundancy built in, the weight was transferred to the remaining columns. This meant the intact columns were now bearing more than their usual weight. The floors at the point of collapse had given out and were sagging inward. The strong connections of the floors to perimeter columns actually pulling these columns inwards from both sides of the building. So the columns at the point of collapse were A. Overloaded. B. Bent in slightly. C. Extremely Hot. Once the final collapse started it was a chain reaction of failure that point, they all went in a split second.

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

Oh yay, an are we sure alt!

That's actually incorrect! It wasn't hot enough to melt that steel:

https://www.tms.org/pubs/journals/jom/0112/eagar/eagar-0112.html