As the building ascends it tapers. As it goes down the supports thicken. When lighter parts fall onto slightly less lighter parts and successfully break up the floors below, heavier floors are accumulated. You don't need to use Bazant's 'indestructible rigid upper block' hypothesis as the only possible explanation. You could also rely upon what actually happened: a virtual block which engulfs floors as it moves downward, constantly changing mass and morphology, swallowing up increasingly heavier floors, which in turn are more capable of destroying increasingly heavier floors.

Have you ever established if the floor supports got thicker and stronger moving downwards too? Or are you strictly dedicated to an unrealistic column-on-column impact scenario instead of a perimeter peeling funnel?

Originally posted by snowcrash911
As the building ascends it tapers. As it goes down the supports thicken. When lighter parts fall onto slightly less lighter parts and successfully break up the floors below, heavier floors are accumulated. You don't need to use Bazant's 'indestructible rigid upper block' hypothesis as the only possible explanation. You could also rely upon what actually happened: a virtual block which engulfs floors as it moves downward, constantly changing mass and morphology, swallowing up increasingly heavier floors, which in turn are more capable of destroying increasingly heavier floors.

Have you ever established if the floor supports got thicker and stronger moving downwards too? Or are you strictly dedicated to an unrealistic column-on-column impact scenario instead of a perimeter peeling funnel?

Are you talking about the floor supports for the slab outside the core. I never claimed floor supports got thicker. I am sure they did not.

Are you saying the core of the building above the impact zone did not come down on the core below? You are talking the pancaking stuff which the NIST says did not happen.

How many connections were there to each floor. How could fire make them give simultaneously when some were more than 200 feet apart?

psik

Originally posted by psikeyhackr
Are you talking about the floor supports for the slab outside the core. I never claimed floor supports got thicker. I am sure they did not.

Yes. So the energy required for floor overload (save the mechanical floors) remains the same, then.

Originally posted by psikeyhackr
Are you saying the core of the building above the impact zone did not come down on the core below?

Yes, but not necessarily by column-on-column impact. Were the core columns designed from one piece from top to bottom?

Originally posted by psikeyhackr
You are talking the pancaking stuff which the NIST says did not happen.

I'm talking ROOSD. Remember?

Originally posted by psikeyhackr
How many connections were there to each floor. How could fire make them give simultaneously when some were more than 200 feet apart?

WTC 2 tipped and then lost its fulcrum. No simultaneous failure there. WTC 1 core failed first, pulling in the floors, triggering ROOSD. This is initiation. From then on, ROOSD. Some core columns much lower didn't fail in the case of WTC 1. They failed subsequently from Euler buckling. They were unbraced way beyond what they could stand, so they self-buckled.

I acknowledge your mass distribution argument, but I don't see how or why it matters when this is the failure mode.

Cafe owner Marcelo de Souza said his livelihood had been destroyed and his possessions had "turned to dust", the Associated Press reported

I think it's obvious that the United States Space Beam -Death Ray had something to do with the dustification of this building. Someone call Judy Woods for verification!

Originally posted by psikeyhackr

The JREF nitwits

Hmmmm....

psikeyhackr
Banned
Join Date: Apr 2008
Location: Sol III
Posts: 470

470 posts..Would that not make you a nitwit too?

Originally posted by psikeyhackr
"Tipped and lost its fulcrum", what rubbish.

The bottom of the top 29 stories move horizontally more than 20 feet. No official source even tries to explain it. The don't even talk about the center of mass of those 29 stories.

I don't see your point.

Originally posted by psikeyhackr
That is why I only discuss the mass distribution and collapse in relation to the north tower. What happened to the south tower is far more weird. So the pancake collapse rubbish of floors outside the core isn't worth stooping to respond to.

Whatever floats your boat.

Originally posted by snowcrash911
As the building ascends it tapers. As it goes down the supports thicken. When lighter parts fall onto slightly less lighter parts and successfully break up the floors below, heavier floors are accumulated.

This is where you make the mistake of assuming something you have no evidence, or precedence for.

You make the assumption that falling part are going to break what they are falling on.

You don't seem to take into consideration the laws of action/reaction, equal opposite reaction and conservation of momentum.

A lighter part is never going to cause a heavier part to break. I think you assume because the lighter part is falling and has momentum that it will break the heavier part, but it doesn't work that way. The forces at impact on both parts will be the same, third law of motion, equal and opposite in direction. For example if the momentum of the falling part increases the forces on BOTH objects increases, remaining equal.

So if the forces are equal, how can the smaller mass break the larger mass? It can't, the falling mass would be resisted by the larger mass. Simple basic physics.

Also do you realise that the sagging truss hypothesis assumes the 5/8 bolts must have been stronger than the columns? Do you think the bolts were stronger than the massive box columns? If you do then how did the bolts break at all in your hypothesis?

Did you notice the contradictions abound yet?

Originally posted by ANOK
The North tower also shows the same, top collapsing independent of the bottom, it just didn't tilt as much...

And there was a huge difference in the amount of tilt The south tower portion was double the height also. The additional 15 stories farther down would be heavier also.

The lack of interest in the tilted top portion of the south tower by the physics profession truly amazes me. Aside from the complete destruction of the buildings that tilted top is the most impressive thing about 9/11. People talking about floors pancaking in the south tower and ignoring that tilt are truly bizarre.

psik

Was it a steele framed building with an Iron Core? Comparing the projects which were probably built by the mafia with materials gone missing to the apex of human architecural engeneering at the time is a bit of a stretch. Else we can give them things like the CCTV building, which was lit like a torch and did not even suffer a partial collapse.

Originally posted by snowcrash911

I'm talking ROOSD. Remember?

Originally posted by psikeyhackr
How many connections were there to each floor. How could fire make them give simultaneously when some were more than 200 feet apart?

WTC 2 tipped and then lost its fulcrum. No simultaneous failure there. WTC 1 core failed first, pulling in the floors, triggering ROOSD. This is initiation. From then on, ROOSD. Some core columns much lower didn't fail in the case of WTC 1. They failed subsequently from Euler buckling. They were unbraced way beyond what they could stand, so they self-buckled.

I acknowledge your mass distribution argument, but I don't see how or why it matters when this is the failure mode.

I don't even try to remember what that stupid acronym means. Th OO is Open Office. It is a tube-in-tube structure. That covers it.

The columns in the core were connected by horizontal beams. Even if the columns miss each other the horizontal beams must impact. But that is what keeps getting disappeared in these so called debates. And then we don't have data on how much thicker the beams got down the building. That would affect the weight of steel on each level.

If the floors outside the core simply pancaked then the core should have remained standing with not much damage. And then stacks of floors were never found in the debris.

psik