12-08-2013, 04:04 PM
Tony Szamboti Wrote:This is just pure nonsense.
No it's not. If the 98th floor were intact and had its frame solidly connected it would fall as one unit as the structure below it failed. This would give the illusion of the collapse starting at the 98th floor but would really be the first level that fell as one unit appearing to be the fail point. Truth is the remaining damaged area below it is what gave out and the intact 98th floor flat is what fell into it.
But this doesn't really answer the majority of what was said. You tend to answer in one-line protests as if we were coming to you for your opinion and begging for your approval. If you watch the Perdue video the core suffered serious damage compromising the main center support area beneath the antenna. As Jeffrey explained the load was redistributed and the antenna 'floated' on the remaining intact core above the damage zone. It was benefiting from the redundancy of the rescuing members. However the damaged core suffered a fatal blow and was heated by fires that caused the floors and core members to slowly sag into this void. Eventually it applied lateral stress that overcame the redundancy of the rescuing members the load had been shifted to and gave way. The failure mode exhibited this by having the intact core from 98 up drop into the void in the core. This is a very obvious failure pattern. The core below the antenna dropped and yanked in the perimeter columns dropping the whole section as you see. Just like the pneumatic dust jets you are seeing, it happens right in front of you if you know what you are looking at. Meanwhile we once again have you protest with a one-liner while avoiding answering the obvious difference in the dust plumes between the 98th floor and further down that disproves them being explosives.