reply to post by lunarminer
Originally posted by lunarminer
Well, I shouldn't even comment on this subject.
That's certainly true.
So much has been said on every possible side of the issue. I doubt that there are any open minds left to persuade.
With you so far.
I am constantly amazed at how little people know about the construction techniques used on the WTC.
Including yourself, of course, who probably knows less than people who know little.
The WTC was not a steel frame construction. It was a concrete frame with pre-stressed cables at 3000 psi. It was the first time that buildings
over 50 stories to use this constuction technique.
Sources please. What prestressed cables are you talking about?
This type of construction has a basic weakness and that is, if enough of the cables in a single column fail, then the entire column fails. If
enough columns fail, then the entire structure fails as the remaining columns are overstressed and the cables within them also fail.
Anyone want mustard with that. It's complete baloney.
When the cables fail and the 3000 psi of potential energy is released, the column blows itself apart along its entire length, looking like it
was exploded.
More baloney.
This is why so many people are fooled into thinking that a controlled explosion brought down the towers.
Complete hogwash. Luny is inventing structural engineering as he goes.
As the fuel from the jets burned, it started to cook the columns. As the columns heated up, the strength of the cables within the columns
changed. If you don't know, metals are weaker the closer they get to their melting point. At 3000 degrees, the jet fuel heated the columns enough to
cause the cables to fail.
Complete nonsense as anyone on any side of the 9/11 story knows. Temperatures never got close to 3000 degrees. I think something like 675 degrees
centigrade was about as high as they could find in tests conducted after the collapse.
After 45 minutes of cooking, the cables within the columns started to fail causing further stress on the remaining columns. As a cable fails,
the remaining cables must bear more stress, until the column fails.
Sources please on the cables.
As more and more columns fail, the remaining columns are having more and more stress placed on them. Until finally all the remaining columns
failed at the same time, because the weights that they were forced to bear exceeded their maximum strength.
This isn't even worth comment.
So, that explains WTC 1 and 2. What about WTC 7?
WTC was subjected to huge stesses. The impact of the planes into the WTC measured .7 and .9 on the richter scale. Then the collapse of those towers
measured 2.1 and 2.3.
These would not be considered huge stresses on the richter scale and would not be expected to damage buildings. Quakes of this magnitude are frequent
around the world.
Debris from the towers fell on WTC 7, that can be seen in the videos. Then there was the huge blizzards of debris from the remains of the
towers. Don't forget that WTC 7 was at the center of those blizzards. All of this happening in short succession over stressed the cables within the
columns of the building.
Source please on the cables.
Those of you who do not work with metal cables may not know this, but once you overstess the cable, the damage is done. The cable is weakened
and may not fail immediately but may fail minutes, hours, days, or weeks later. Don't forget that these cables are tensioned to 3000 psi, that is a
huge amount of potential energy.
This is all baloney. I think I read somewhere that a Great White Shark bites down with a pressure of 18,000 pounds per square inch.
One other thing that I have not seen anywhere else is this fact. The WTC was a giant tuning fork. Once struck by the planes, they would have
vibrated at around 550 KHz. This type of vibration would do immense damage to both the towers and the surrounding buildings. The frequency was too
high to hear but based on the force of impact the sound must have been in the hundreds of decibels. Each of the cables within the columns, and the
columns themselves would have resonated with this frequency.
Just like the wine glass that shatters when exposed to its resonant frequency, the columns would have eventually failed. This is simple physics.
Complete, utter baloney. Everything, we are told, does have a resonant frequency, but what you say above is nonsense.
[edit on 2-1-2009 by ipsedixit]
[edit on 2-1-2009 by ipsedixit]
