Quote from ShadowXIX: "I dont have to ask myself since I know the answer. Because I know how it was designed and how forces like inertia and gravity
work, as you clearly dont.
Maybe this will help you understand how the floors in the towers were created.
This might be a bit much for you to take in though"
Whoa, and here i was thinking we had a healthy and intelligent debate going on with intelligent participants. Why the condescending attitude? Have i
said something that demands that i be patrinized? Just who do you think you are speaking to, a child? Quite the opposite. I have a Civil Engineering
degree, Do you?
Review of videotape recordings of the collapse taken from various angles indicates that the transmission tower on top of the structure began to move
downward and laterally slightly before movement was evident at the exterior walls. This suggests that collapse began with one or more failures in the
central core area of the building.
FEMA claims in their conclusion:
The fire-performance of steel trusses with spray-applied fire protection, and with end restraint conditions similar to those present in the two
towers, is not well understood, but is likely critical to the building collapse.
www.serendipity.li...
In a Nutshell, FEMA is claiming trusses that supported the floors were not solidly attached to their end supports, the exterior wall and the interior
core structure. Just heat from the alleged burning fuel caused the trusses to expand falling off their supports resulting in the 'collapse' of the
North Tower. Many have seen warehouses with their steel trusses supporting the roof. These trusses may or may not be attached to their supporting
walls. HOWEVER, the North Tower is a 110 story skyscraper not a warehouse!
The design concept of tubular framing (the so-called tube within a tube architecture) has been employed in the construction of many of the world's
tallest buildings. These include the John Hancock Center (1105 ft), the Standard Oil of Indiana Building (1125 ft), the World Trade Center Towers
(1350 ft), and the Sears Tower (1450 ft). In fact, most modern skyscrapers use this design, a design which uses a specially reinforced perimeter wall
to resist all lateral loading and some of the gravity loading, and a heavily reinforced central core to resist the bulk of the gravity loading. The
lateral loading (horizontal force) on the building, is mainly due to the wind while the gravity loading (downward force) is due to the weight of the
building (i.e., due to gravity).
In the tube within a tube architecture, it is of vital importance that the horizontal forces on one wall be transfered to the other walls, so that the
entire structure will bend to the minimum extent possible. It is also of vital importance that these horizontal forces be transfered to the central
core so that the entire structure bends uniformly as one unit.
This is achieved by the use of a composite flooring system, which is designed to act (in essence) as one super-large beam. The idea is to connect the
steel joists supporting the concrete slab, to the slab,
The combined steel joist-concrete slab, has sufficient strength to transfer the lateral loading to the core and the other walls, so that the building
bends as little as possible, but when it does bend, it bends as a unit.
The Sixty State Street Building (Bosten) has solid steel beams spanning the gap (of up to 40 feet) between the central core and perimeter wall.
TO TOPPLE THE TOWER cutter charges would be placed: 1) on the exterior columns, 2) at the intersection of the floor assembly to the wall, and 3) on
the inner core support columns and cross beams. Video analysis indicates that one floor was taken out simultaneously with the whole core structure
being blasted to pieces.
I have plenty of pictures and diagrams to go with all this, i just don't know how to post them. Any help would be appreciated.
[edit on 12-11-2005 by Master Wu]
[edit on 12-11-2005 by Master Wu]