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originally posted in:Liberty Omega
2/1/2015 11:25:51 PM
35
Jet fuel burns at 800 to 1500 degrees; steel melts at 2700 degrees (F)
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1 ReplyEdited by DukeOfStuffing: 2/2/2015 12:38:12 AMThermite. At any rate, wouldn't it be funny if a wealthy oil tycoon in the middle east recreated replicas of the towers and flew a plane into them for experimentation sake? Further, what of the building that wasn't hit by a plane?
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17 RepliesEdited by Bolt: 2/2/2015 12:39:27 AMTo refute that particular argument; steel may not [i]melt[/i] until it reaches 2700 degrees Fahrenheit, but it will lose a significant amount of its strength at far lower temperatures. Remember, "melting" implies the steel is entirely liquid. You'd surely agree that a warm hot dog will deform much more easily than a frozen one, even though they're both solids. Steel classified as "Structural Steel" is designated with a "Critical Temperature" which is the temperature at which it can no longer support the weight it's stated to. This is usually determined as the point at which the yield strength (the amount of stress a material can endure without deforming) drops down to 60% of the strength it has at room temperature. This value varies based on the type of steel (steel is an alloy of carbon and iron, so different concentrations of those, and even the temperature/speed at which they are heated and cooled can have huge changes on their material properties), but in the US, most structural steel has a Critical Temperature between 1000 and 1300 degrees Fahrenheit, a range within the range you gave for burning jet fuel.
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Edited by Woupsea: 2/18/2015 7:13:04 PMPeople don't take into account that the building had been hit by a plane, which probably damaged the building's support structure to a point where melting wouldn't be necessary. The steel doesn't have to melt for the buildings stability to be breached And then there's also the office supplies burning, heating units, electrical fires, etc
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By poptart got weak as -blam!- after I put it in the microwave for fifteen minutes but it didn't melt.
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3 Replies>ˢʷᵉᵃʳ ᵗᵒ ᵍᵒᵈ ᶦᶠ ᵃᶰʸ ᵒᶠ ʸᵒᵘ ᵐᵒᵗʰᵉʳʳᶠᵘᶜᵏᵉʳˢ ᶜᵒᵖʸ ᵃᶰᵈ ᵖᵃˢᵗᵉ ᵗʰᶦˢ ʸᵒᵘ ʷᶦᶫᶫ ᵇᵉ ᶦᶰ ˢᵉʳᶦᵒᵘˢ ᵗʳᵒᵘᵇᶫᵉ
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Traces of thermite were find at ground zero [spoiler]No sign of a plane has been found[/spoiler]
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Steel may not melt but it also bends and warps at lower temperatures. Not to mention a giant -blam!-ing plane hit the building as well
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I have a few "jet fuel can't melt steel beams" memes somewhere. Steel beams do however loose structural integrity at 800 degrees. Accompanied by 400k pounds of plane. Kinda self explanatory.
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>American Steel lelelelelelelelelelelel
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So your logic states that steel is impervious unless melted? Ok.[spoiler]I can't believe I'm taking this bait...[/spoiler]
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5 RepliesOne fourth of Americans think 9/11 is a conspiracy, one fourth of Americans are idiots. Coincidence? I think not.
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They were built like shit.
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How did the passport survive the collapse and the plane crash.
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Isn't this a meme?
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1 ReplyIt didn't need to fully melt. I imagine heating steel up would substantially weaken it. Also a plane crashing into it wouldn't have helped.
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You're a few years late to the party, Dustin. [spoiler]By the way, load bearing steel used in buildings will weaken at temperatures of about 1300 degrees Fahrenheit. The steel weakens and the load that it is bearing will deform and crush the steel bars. Thus, the building is literally crushed beneath it's own weight.[/spoiler]
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[quote]To refute that particular argument; steel may not [i]melt[/i] until it reaches 2700 degrees Fahrenheit, but it will lose a significant amount of its strength at far lower temperatures. Remember, "melting" implies the steel is entirely liquid. You'd surely agree that a warm hot dog will deform much more easily than a frozen one, even though they're both solids. Steel classified as "Structural Steel" is designated with a "Critical Temperature" which is the temperature at which it can no longer support the weight it's stated to. This is usually determined as the point at which the yield strength (the amount of stress a material can endure without deforming) drops down to 60% of the strength it has at room temperature. This value varies based on the type of steel (steel is an alloy of carbon and iron, so different concentrations of those, and even the temperature/speed at which they are heated and cooled can have huge changes on their material properties), but in the US, most structural steel has a Critical Temperature between 1000 and 1300 degrees Fahrenheit, a range within the range you gave for burning jet fuel.[/quote]
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3 RepliesBad b8 bad
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1 ReplyEdited by CrazyLincoln: 2/2/2015 8:03:31 AMHow did this happen Dustin? Well, have you ever heated up a piece of metal to bend it? Did you notice how it didn't melt when you bent it? Hmmm, I wonder what would happen when the structural metal beams start to bend? It's a god damn mystery.
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1 Reply[quote]To refute that particular argument; steel may not [i]melt[/i] until it reaches 2700 degrees Fahrenheit, but it will lose a significant amount of its strength at far lower temperatures. Remember, "melting" implies the steel is entirely liquid. You'd surely agree that a warm hot dog will deform much more easily than a frozen one, even though they're both solids. Steel classified as "Structural Steel" is designated with a "Critical Temperature" which is the temperature at which it can no longer support the weight it's stated to. This is usually determined as the point at which the yield strength (the amount of stress a material can endure without deforming) drops down to 60% of the strength it has at room temperature. This value varies based on the type of steel (steel is an alloy of carbon and iron, so different concentrations of those, and even the temperature/speed at which they are heated and cooled can have huge changes on their material properties), but in the US, most structural steel has a Critical Temperature between 1000 and 1300 degrees Fahrenheit, a range within the range you gave for burning jet fuel.[/quote]
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Initial impact took out a chunk of supports, damaged a lot of others to the point of near-uselessness. Then those heated enough to become malleable, and subsequently gave way, which kickstarted a domino effect.
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because God.
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You were rekt by silent.
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George bush harnessed the power of satan to elevate the heat and explode the building next door.
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Oh god not another -blam!-ing conspiracy theorist.
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The building didn't need to completely melt to collapse, just needed to be weak enough so that the support couldn't hold up the rest of the tower.
