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Originally posted by Zaphod58
So what you're saying is that steel is stronger than solid concrete reinforced with steel? So why don't they build EVERYTHING out of steel then if that's true?
Originally posted by twitchy
Um yeah, we're saying that Steel is stronger that solid concrete reinforced with steel. As to why don't we build everything out of solid steel, well I honestly don't think your thinking that through.
If we played rock paper scissors, and instead we used steel, aluminum, and concrete and you showed concrete and I showed steel, I just honestly think I should win that round, don't you? (Of course if we showed super aluminum, well that beats steel and concrete.)
If you need evidence of that, take a sledge hammer, most of which have a steel head, and smash it into a concrete block of whatever size and mass you desire as hard as you can, and see what your results are. Is the steel in the sledge hammer head still intact? Now repeat the experiment, this time using steel reinforced concrete and bash in say your steel (rebar) reinforced concrete basement wall with the steel sledge hammer, feel free to share your results with the group.
Originally posted by Zaphod58
Whether it was one engine, one engine and the landing gear (which it was), or the entire plane, the fact remains that it went COMPLETELY THROUGH the Empire State Building, which was a concrete and steel structure.
According to your logic it shouldn't even have gone through the building AT ALL, and should have crumpled up and fallen to the street below.
The plane exploded within the building. There were five or six seconds - I was tottering on my feet trying to keep my balance - and three-quarters of the office was instantaneously consumed in this sheet of flame. One man was standing inside the flame. I could see him. It was a co-worker, Joe Fountain. His whole body was on fire. I kept calling to him, "Come on, Joe; come on, Joe." He walked out of it.
Originally posted by talisman
...
If Water can cut through steel, and a Plane create a Hole in the Empire State Building. Then I have no problem believing that a 767 went right through STEEL on 9/11.
...
Originally posted by bigbrain
Where have you studied physics? Among the Zulu?
Originally posted by bigbrain
Where have you studied physics? Among the Zulu?
In 1980, abrasive-waterjets were used for the first time to cut steel, glass, and concrete. In 1983, the world's first commercial abrasive waterjet cutting system was sold for cutting automotive glass. The first adopters of the technology were primarily in the aviation and space industries which found the waterjet a perfect tool for cutting high strength materials such as Inconel, stainless steel, and titanium as well as high strength light-weight composites such as carbon fiber composites used on military aircraft and now used on commercial airplanes. Since then, abrasive waterjets have been introduced into many other industries such as job-shop, stone, tile, glass, jet engine, construction, nuclear, and shipyard, to name a few.
Originally posted by twitchy
Well gee, I wonder what load bearing means? I guess the building above the two points of impact were by your logic weightless, or perhaps unsupported? Talk about 'deceptive'.
Originally posted by mister.old.school
Steel members under stress from load do not also have increased mass... in fact, the amount of stress on load bearing members may contribute their their ability to bend and/or break from sudden kinetic energy.
Originally posted by twitchy
Originally posted by mister.old.school
Steel members under stress from load do not also have increased mass... in fact, the amount of stress on load bearing members may contribute their their ability to bend and/or break from sudden kinetic energy.
Yes yes... Mass, Stress, Loads... Semantics.
So if I stand a steel beam up by itself, and knock it down with a sledge hammer made of say this super aluminum even, then I take the same steel beam and put a couple thousand tons of weight pressing down on it, are you honestly going to try to tell me that the steel beam is going to come flying out of that just as easily as the freestanding one did? Even according to you it will make it easier to knock out? Come on now, I watched Mr. Wizard when I was a kid.
Originally posted by billybob
that's probably why NIST assigned such a ridiculously low safety factor to the core and perimeter. they said 1.6, or 1.7 or something, when in fact, the "engineering record" published a figure of 20 !!!! for the perimeter.