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If you have eyes, you will see I have been insulted WAY more than I have insulted anybody else (if I even have for that matter) so you're biased point is void.
A building collapsing in its footprint, evidenced by the outer walls being on top of the collapsed building, can only happen from a controlled implosion demolition.
The buildings used high-strength, load-bearing perimeter steel columns called Vierendeel trusses that were spaced closely together to form a strong, rigid wall structure. There were 59 perimeter columns, narrowly spaced, on each side of the buildings. In all, the perimeter walls of the towers were 210 feet (64 m) on each side, and the corners were beveled. The perimeter columns were designed to provide support for virtually all lateral loads (such as wind loads) and to share the gravity loads with the core columns.[46] Structural analysis of major portions of the World Trade Center were computed on an IBM 1620.[47]
Typical WTC architectural floor planThe perimeter structure was constructed with extensive use of prefabricated modular pieces, which consisted of three columns, three stories tall, connected by spandrel plates. The perimeter columns had a square cross section, 14 inches (36 cm) on a side, and were constructed of welded steel plate.[48] The thickness of the plates and grade of structural steel varied over the height of the tower, ranging from 36,000 to 100,000 pounds per square inch[49] (260 to 670 MPa). The strength of the steel and thickness of the steel plates decreased with height because they were required to support lesser amounts of building mass on higher floors.[48] The tube-frame design required 40 percent less structural steel than conventional building designs.[50] From the 7th floor to the ground level, and down to the foundation, the columns were spaced 10 feet (3 m) apart.[51] All columns were placed on bedrock, which, unlike that in Midtown Manhattan, where the bedrock is shallow, is at 65–85 feet (20–26 m) below the surface.[52]
The spandrel plates were welded to the columns to create the modular pieces off-site at the fabrication shop.[53] The modular pieces were typically 52 inches (1.3 m) deep, and extended for two full floors and half of two more floors.[48] 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 the column splices between adjacent modules were not at the same floor.[48
Originally posted by jimnuggits
Anybody here ever worked with steel?
It's an impossible medium, because you have to keep it incredibly hot to work with it, ie bend, manipulate.
Jet fuel and office furniture would not create enough heat, with any kind of flame that would last long enough to completely melt the steel supports.
It may have reached melting temperature, but not nearly long enough to cause a molten puddle that lasted for literally months.
Next...?
Originally posted by Averysmallfoxx
reply to post by SkepticAndBeliever
Let me show you how we do things here man. THIS is an article validating earlier claims that Tower 7 had collapsed around an hour earlier than it had. I am still looking for the coverage of the cnn anchor whom stated 7 had collapsed when in reality, she was overlooking the view and in the background tower 7 is still up. This is supposed to be live coverage. Around 5-7 minutes before it does, the anchor suddenly loses signal or something like that. 7 was the eyesore of the mess of a cover up 9/11 turned out to be, that and maybe the pentagon hit....where those RR engine casings go eh??
Tower 7 prematurely reported down
[gvid]
Originally posted by dadgad
SkepticBeliever. Give up alright, this is a forum for intelligent people. Stop talking about gravity. What removed the mass to cause near free fall, free fall acceleration? Im guessing your fantasy
Originally posted by liejunkie01
reply to post by ANOK
A building collapsing in its footprint, evidenced by the outer walls being on top of the collapsed building, can only happen from a controlled implosion demolition.
Wrong...
The World Trade Centers towers walls were the structural strength in th building. If you would take the time to look this up you would know this and not keep typing false information.
The buildings used high-strength, load-bearing perimeter steel columns called Vierendeel trusses that were spaced closely together to form a strong, rigid wall structure. There were 59 perimeter columns, narrowly spaced, on each side of the buildings. In all, the perimeter walls of the towers were 210 feet (64 m) on each side, and the corners were beveled. The perimeter columns were designed to provide support for virtually all lateral loads (such as wind loads) and to share the gravity loads with the core columns.[46] Structural analysis of major portions of the World Trade Center were computed on an IBM 1620.[47]
Typical WTC architectural floor planThe perimeter structure was constructed with extensive use of prefabricated modular pieces, which consisted of three columns, three stories tall, connected by spandrel plates. The perimeter columns had a square cross section, 14 inches (36 cm) on a side, and were constructed of welded steel plate.[48] The thickness of the plates and grade of structural steel varied over the height of the tower, ranging from 36,000 to 100,000 pounds per square inch[49] (260 to 670 MPa). The strength of the steel and thickness of the steel plates decreased with height because they were required to support lesser amounts of building mass on higher floors.[48] The tube-frame design required 40 percent less structural steel than conventional building designs.[50] From the 7th floor to the ground level, and down to the foundation, the columns were spaced 10 feet (3 m) apart.[51] All columns were placed on bedrock, which, unlike that in Midtown Manhattan, where the bedrock is shallow, is at 65–85 feet (20–26 m) below the surface.[52]
The spandrel plates were welded to the columns to create the modular pieces off-site at the fabrication shop.[53] The modular pieces were typically 52 inches (1.3 m) deep, and extended for two full floors and half of two more floors.[48] 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 the column splices between adjacent modules were not at the same floor.[48
en.wikipedia.org/wiki/Construction_of_the_World_Trade_Center
Here is the floor truss design.
[atsimg]http://files.abovetopsecret.com/images/member/2b8d283b3f47.png[/atsimg]
The floor trusses connect to the outer truss design. The skin if you will, takes the brunt of the load.
Again if you would take the time to look at the engineering facts and the true design of the buildings you would hopefully understand how they came down...Quit getting your "facts" from the uninformed. It makes you look less credible....You need to focus on another topic because this one is a done deal.
Originally posted by dadgad
reply to post by SkepticAndBeliever
oh you piece of /.... that is pure fantasy and a insult to common sense. 50% is/might be possible, however only if the heat source is centered at one point. Office fires wont do that, they never did and they never will. Stop spreading myths.
Originally posted by notsoperfect
reply to post by dadgad
There are three shills on top of the OP on this disinfo campaign. You know who they are..
They have prepared even the drawings ready to display...
The building's core housed the elevator and utility shafts, restrooms, three stairwells, and other support spaces. The core of each tower was a rectangular area 87 by 135 feet (27 by 41 m), and contained 47 steel columns running from the bedrock to the top of the tower.[48] The columns tapered after the 66th floor, and consisted of welded box-sections at lower floors and rolled wide-flange sections at upper floors. The structural core in 1 WTC was oriented with the long axis east to west, while that of 2 WTC was oriented north to south. All elevators were located in the core. Each building had three stairwells, also in the core, except on the mechanical floors where they were located outside the core.
The large, column-free space between the perimeter and core was bridged by prefabricated floor trusses. The floors supported their own weight, as well as live loads, provided lateral stability to the exterior walls, and distributed wind loads among the exterior walls. The floors consisted of 4-inch (10 cm) thick lightweight concrete slabs laid on a fluted steel deck with shear connections for composite action.[4
The floors supported their own weight, as well as live loads, provided lateral stability to the exterior walls, and distributed wind loads among the exterior walls.