16-08-2013, 03:13 AM
There were no kingpins in the twin towers. These were highly redundant structures, including the connections, and random heating would not have worked to break things loose. Getting enough momentum going in all three cases required significant assistance in the beginning of the collapses for overloading of floors and a cascade causing columns to be unsupported etc. to then finish the job of destroying the buildings.
The connections are the weakest link in any structure, but the word weakest does not mean weak. It is relative to the other items and if the weakest link can handle several times the load, the structure is considered robust by any measure.
There were also no kingpins in WTC 7, and in that case its top section did act like a pile driver after its momentum was generated by eight stories of its entire core being pulled symmetrically between floors 7 through 14.
The connections are the weakest link in any structure, but the word weakest does not mean weak. It is relative to the other items and if the weakest link can handle several times the load, the structure is considered robust by any measure.
There were also no kingpins in WTC 7, and in that case its top section did act like a pile driver after its momentum was generated by eight stories of its entire core being pulled symmetrically between floors 7 through 14.