Events similar to 9/11: Pirelli Tower, Empire State Building

rubbish

 

What is the slenderness ratio of the central core?

 

its newtons fault!

you arent seriously going to take this to the land of crazy as it appears you are attempting to do are you?

 

Please tell me how columns are a force.

 

you believe the core will collapse under its own weight, by all means show your cipherin

and what does holding it straight have to do with +/-force?

 

That's utter bull(*)(*)(*)(*),and you know it '.... Nonetheless, the structural engineers of the World Trade Center ended up following draft versions of the new 1968 building codes.[32] The tube-frame design, earlier introduced by Fazlur Khan, was a new approach that allowed more open floor plans than the traditional design that distributed columns throughout the interior to support building loads. The World Trade Center towers used high-strength, load-bearing perimeter steel columns called Vierendeel trusses that were spaced closely together to form a strong, rigid wall structure, supporting virtually all lateral loads such as wind loads, and sharing the gravity load with the core columns. The perimeter structure containing 59 columns per side was constructed with extensive use of prefabricated modular pieces, each consisting of three columns, three stories tall, connected by spandrel plates.[32] The spandrel plates were welded to the columns to create the modular pieces off-site at the fabrication shop.[33] Adjacent modules were bolted together with the splices occurring at mid-span of the columns and spandrels. The spandrel plates were located at each floor, transmitting shear stress between columns, allowing them to work together in resisting lateral loads. The joints between modules were staggered vertically, so that the column splices between adjacent modules were not at the same floor.[32]'

 

The core columns do not depend on the perimeter columns. See the picture. The core columns are standing by themselves and they are taller than the perimeter columns because the perimeter columns depend on the core columns. The core columns have to be erected first. See how massive the core columns are and all the bracing between them? There are 48 core columns and they don't need the perimeter columns. The floors depended on the perimeter columns and core columns.

 

more fun and games.

these OSHugger people seem to think the core was a single 1000 ft tall column.


where does the craziness end?

 

I hope with indictments for fraud and mass murder.

 

True believers are not interested in the facts so it is pointless to try and talk sense to someone like Wizard.

 

Sure they are but people like you never offer any facts.

 

You mean the facts presented are ignored by the truthers. Plenty of facts. What do truthers present? Assumptions, opinions, scenarios including things that don't even exist.

 

yeh here ya go

look at the size of that core and these guys think it cant support itself LMAO



just eyeballing it, it looks to me like the core is about 60% of the building.

those jets must have been set to robo-destructo mode to wipe out the core like that, and all at the same time too so it fell straight down!! Amazing what they can do with jets now days

 

Wrong truthers present baseless claims and assertions they do not present facts.

It is you and other truthers ignoring the facts and you know it.

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Can you produce a mathematic equation showing how it should have fallen?

Oh thats right you have no conprehension of math and confuse it with cartoons

 

<sigh> they aren't THAT much taller thal the perimiter columns....But you know that too,don't you?

You're just being intentionally misleading because you cannot admit being wrong...

 

The kinetic energy of the falling building is approximately as much energy as five hundred forty one-thousand-pound blockbuster bombs or about as much energy as a small nuclear weapon. Koko would like us to believe that the building would not be affected by that energy at any point.

 

Uh, go back and read what I wrote.

 

I sit corrected

 

Caught up in the moment.

 

nothing new there.

 

For you

 

I obviously know a lot more about it than you do. The 48 core columns were the main structural columns for the buildings. The perimeter columns were the lateral structure for wind loads etc, and floor support. What we are looking at in that picture is four of the 48 core columns on the upper stories. See the Z bracing. That Z bracing prevents lateral movement. Those core columns on the upper floors were smaller than the base core columns. The outside dimensions of the upper floor core columns were 36" x 16" and the steel was 2" thick. There is no way a jet airplane made of aluminum and offices fires destroyed those core columns.

 

well since there are so many experts on this board I figured I better draw them a picture so they can figure out what part the core is.

the yellow shows the outside dimensions of the core, the cyan the outside dimensions of the facade.

how does a small fire weaken so many columns at once so they all cut loose at once?





it seems everyone understands the design except debunkers.

 

First of all once again no one said they were destroyed only weakened.

Second it is only your uninformed opinion that it could not have happened you can offer no proof that there is no way for a jet crash and fire to weaken them that way.

Show your evidence

 

Obviously as usual,you talk a good game,but fail in the finals....the core was PART of the buildings structure,NOT all of it...One depended on the other....