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Originally posted by Griff
Originally posted by apex
Actually, as you heat steel up, you'd be surprised how much it can weaken, so from an engineering standpoint, it isn't really surprising that it came down.
How much does steel have to heat up to weaken? BTW, NIST found only ONE piece of steel that went over 250C. That's not enough to weaken it for collapse.
and considering the outside wasn't built to hold too much of it up
It was designed for 50% of the wieght. I wouldn't call that "not too much".
(combined with loss of the core), it isn't really surprising it came down, is it?
This is where you lost me. What loss of core? What was the mechanism for loosing the core?
Originally posted by apex
I mean, that particularly in the north tower, the plane went straight into the core of the structure, and that along with the loss of the outside brought it down. (or have I just metaphorically shot myself in the foot with this?)
Originally posted by esdad71
Being from NY, I would have been there with the onlookers. Until that first tower came down, No one knew what would happen. After that all bets were off and people scrambled for their lives.
Originally posted by FlyersFan
The buildings didn't suffer 'minority damage'. It was rather major.
Watching them as they were burning, and looking at the HUGE
holes in them, many Americans figured they were coming down.
Rudy isn't the only one who stood there thinking that they were going
to fall. Being a non-civil engineer, I figured they'd fall over sideways.
Originally posted by 27jd
How do you cut down a tree from the top?
Originally posted by spiritp0wer
Guiliani should be hanged at the World Trade Center site for not backing the people in his State.
Hang this son of a bitch.
Originally posted by selfless
The towers were structurally engineered in a manner that could allow 10 planes to crash into them and not fall...
If you think it's common sense that the towers would pancake onto them selves from a plane crash into the building,
Originally posted by FlyersFan
That's how us lay folks (non-civil engineers) would say it .. we were surprised that it fell in on itself instead of falling outwards like a tree being cut down.
Originally posted by Griff
How much does steel have to heat up to weaken? BTW, NIST found only ONE piece of steel that went over 250C. That's not enough to weaken it for collapse.
Originally posted by FlyersFan
No. Re-read what I said.
I said that I thought it would FALL OVER ... like a tree getting cut down. I said that when it came straight down it was a surprise. However, I do indeed think that it's entirely probable that having a big plane full of fuel hitting the trade center would definately bring it down. It just came down different from how I thought it would.
Originally posted by selfless
The towers were structurally engineered in a manner that could allow 10 planes to crash into them and not fall...
Originally posted by SR
Originally posted by selfless
The towers were structurally engineered in a manner that could allow 10 planes to crash into them and not fall...
1 - I don't believe that those structures could possibly stand 10 big planes full of fuel pounding into each of them at such an excessive rate of speed ... no freak'n way.
2 - What ever engineer(s) said that they could ... they are wrong. Plain and simple. Engineers are humans and they make mistakes and who ever said that, they made a whopper of a mistake. that's insane.
Do you have a background in engineering that would make your claim credible?
Originally posted by selfless
People, this means you have to stop using oven steel trays in the oven or else it will melt!!!! wait...... no it doesn't.
Oh no I'm in trouble, i some times put it to 450c....
Originally posted by selfless
The towers were structurally engineered in a manner that could allow 10 planes to crash into them and not fall...
Originally posted by Griff
Originally posted by SR
Originally posted by selfless
The towers were structurally engineered in a manner that could allow 10 planes to crash into them and not fall...
1 - I don't believe that those structures could possibly stand 10 big planes full of fuel pounding into each of them at such an excessive rate of speed ... no freak'n way.
2 - What ever engineer(s) said that they could ... they are wrong. Plain and simple. Engineers are humans and they make mistakes and who ever said that, they made a whopper of a mistake. that's insane.
I agree on both accounts. One plane took out 15% of the outer columns. Just simple math tells us that 10 planes would do 150% damage. That's one and a half buildings.
Originally posted by apex
Maybe you missed his post further up the page saying he made a mistake.
In any case, oven trays will be a different steel to that used for making skyscrapers. And he didn't say melt, at the right heat it will have a lower strength, it will look the same macroscopically, but microscopic level analysis shows it is different.
Originally posted by apex
Maybe you missed his post further up the page saying he made a mistake.
Originally posted by selfless
But the damage was mostly cosmetic, wasn't it?
Originally posted by Griff
Originally posted by selfless
But the damage was mostly cosmetic, wasn't it?
You're mostly right. But, the columns that were severed would be considered structural damage. I was just agreeing that 10 planes was an exageration. Not that your thought process was flawed.