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Originally posted by Essan
Now, whether that means it was a construction or design fault (the conspiracy no one wants to address!),
Only the small secrets need to be protected. The big ones are kept secret by public incredulity. - Marshall McLuhan (media guru)
UNDERNEWS SPECIAL REPORT
Dec 15, 2003
From the Progressive Review
Edited by Sam Smith
Since 1964, Washington's most unofficial source
www.prorev.com...
PROGRESSIVE REVIEW SPECIAL REPORT
The World Trade Center's Dirty Secret
The first story below, column one in Sunday's Times, involves a matter the Review has been following since the month after the attack on the WTC. Even this report, however, does not suggest the depth of the scandal - the probability that most of the deaths at the WTC were not due to the crash of the planes but to the grossly negligent construction of the buildings in violation of fire standards dating back as far as 60 years. Involved are not merely design flaws, as one might gather from the Times article, but the deliberate circumventing of city fire codes by having the World Trade Center exempted from them. To get some sense of the seriousness of the matter, compare the understated Times report with the criminal charges filed in the recent Rhode Island music hall fire or with last century's Shirtwaist Triangle fire. We have also included earlier accounts to give a better picture of this largely suppressed story
The building is being promoted as the safest skyscraper in the U.S.[56] According to Silverstein Properties, the owner of the building, it "will incorporate a host of life-safety enhancements that will become the prototype for new high-rise construction".[57] The building has 2 ft (60 cm) thick reinforced-concrete and fireproofed elevator and stairway access shafts. The original building used only drywall to line these shafts.[58] The stairways are wider than in the original building to permit faster egress.[58] Steel columns are encased in much thicker fire protection, which consists of a medium-density, portland cement-based product that adheres well to the steel columns, among other advantages over alternate types of spray-applied fire-resistive material.[59
Originally posted by thedman
The "theory" or more correctly ravings that the buildings were designed
to fail 30 years later as part of some conspiracy is absurd.
sheet roo
None of the chiefs present believed a total collapse of either tower was possible. Later, after the Mayor had left, one senior chief present did articulate his concern that upper floors could begin to collapse in a few hours, and so he said that firefighters thus should not ascend above floors in the sixties.
It is known that structural steel begins to soften around 425°C and loses about half of its strength at 650°C.4 This is why steel is stress relieved in this temperature range. But even a 50% loss of strength is still insufficient, by itself, to explain the WTC collapse. It was noted above that the wind load controlled the design allowables. The WTC, on this low-wind day, was likely not stressed more than a third of the design allowable, which is roughly one-fifth of the yield strength of the steel. Even with its strength halved, the steel could still support two to three times the stresses imposed by a 650°C fire.
Originally posted by Aim64C
I would like to point out that, when this happened, I was not at all surprised to learn both towers had collapsed. Buildings are simply not designed to have planes flown into them. Plain and simple. Tower + impact + structural damage + fire = collapse of said tower.
The early news reports noted how well the towers withstood the initial impact of the aircraft; however, when one recognizes that the buildings had more than 1,000 times the mass of the aircraft and had been designed to resist steady wind loads of 30 times the weight of the aircraft, this ability to withstand the initial impact is hardly surprising. Furthermore, since there was no significant wind on September 11, the outer perimeter columns were only stressed before the impact to around 1/3 of their 200 MPa design allowable.
Originally posted by Aim64C
Same concept, here. While the total force exerted on the structure in heavy winds is far greater than that of the airliner - it is distributed across the entire surface of the structure and successfully countered by each level of supports. A plane is not only much harder than air - it also has much more concentrated mass and velocity - meaning it is going to cause damage to the structure.
Originally posted by ULTIMA1
Originally posted by Aim64C
Same concept, here. While the total force exerted on the structure in heavy winds is far greater than that of the airliner - it is distributed across the entire surface of the structure and successfully countered by each level of supports. A plane is not only much harder than air - it also has much more concentrated mass and velocity - meaning it is going to cause damage to the structure.
But the point is the evidence still states the planes did not cause enough damage to cause the collapse.