Colonel Panic wrote:The WTC towers were not homogeneous structures. They were more like a stack of 100 dinner plates made of a very heavy, yet fragile and crumbly material, and held together by pipecleaners.
So the towers were ceramic platters stacked on thin wires???

Were there any paper clips or bungee cords used? Could you find that out for me?
Each tower was supported by a structural core extending from its bedrock foundation to its roof. The cores were rectangular pillars with numerous large columns and girders, measuring 87 feet by 133 feet. The core structures housed the elevators, stairs, and other services. The cores had their own flooring systems, which were structurally independent of the floor diaphragms that spanned the space between the cores and the perimeter walls. The core structures, like the perimeter wall structures, were 100 percent steel-framed.
The World Trade Center project in lower Manhattan last week entered a new phase of construction. A crane placed the first of 76 huge steel columns, shaped like short-handled pitch-forks, that will transfer the load of 101 stories of office space to the substructure. The four-story columns are the largest structural components of the project's twin 110-story towers.
CP has been lying throughout this thread about the composition of the floor decks.
On the 41st and 42nd floors, both towers will house mechanical equipment. To accommodate the heavy loads, the floors are designed as structural steel frame slabs. All other floors from the ninth to the top (except for 75 and 76, which will also carry mechanical equipment) have typical truss floor joists and steel decking.
CP lied about the weight of the towers and the size of the core columns.
Into the towers rising from the excavation are going some 200,000 pieces of steel having a total weight of about 200,000 tons (about 1/5 of the total weight of the structures). Individual columns in the lower core section, measuring 52 x 22 in. in plan, are formed of 5 and 3-in, plate into almost solid steel shafts that weigh up to 56 tons.
CP and Gramsci have been lying about the load bearing responsibilities of the exterior and interior columns.
For record-height towers of New York's World Trade Center, engineers proportion columns to avoid floor warpage when high-strength steels are used for exterior columns and A36 steel for interior columns.
A design procedure that will be used for structural framing of the 1,350-ft high twin towers of the World Trade Center in New York City gives the exterior columns tremendous reserve strength. Live loads on these columns can be increased more than 2,000% before failure occurs.
The structural engineers adopted this particular design because of the great length of the columns, use of different grades of steel and their plan to take wind stresses in the exterior columns only.
Walls resist wind. In designing the record-height towers against wind, Worthington, Skilling, Helle and Jackson adopted a scheme that does not rely on the core at all to take wind. Each tower will act as a vertical, cantilevered hollow tube.
This is probably where mental patients and shills like Gramsci stopped reading, if they read anything about the towers. Gramsci, in May 2007, was still operating under the false assumption that the towers were hollow tubes. Gramsci, in May 2007, thought that the exterior columns
were the only load bearing columns in the buildings! Gramsci, if he could be bothered to read and not just pour more arrogance and deluded bias into his gas tank, could have corrected his mistaken ideas about the WTC designs years ago- but that would have violated the established Gramsci method.
The giant Vierendeel trusses forming the loadbearing exterior walls will provide the required rigidity and strength to resist wind. All the horizontal shear will be resisted by the sides of the building parallel to the wind, and most of the overturning moment will be taken by the exterior walls normal to the wind. For economy in resisting the stresses, the wall columns will be made of high-strength steels, as indicated in the diagram above.
What's really funny is that tube within a tube skyscrapers continue to be built, and continue to be occupied by tenants. In demented Gramsci world, buildings like these are dangerous designs, and should be abandoned. THAT ISN'T HAPPENING. Why aren't the owners of buildings with similar designs to the WTC evacuating them and closing them, as Gramsci would argue needs to be done? They're ticking time bombs, according to Gramsci: "one poke, and down they go".
AMOCO building in Chicago. Tubular construction. It's unusable, according to Gramsci.