@Olivier5,
Quote:You don't need "all the heat" to be "transferred". Flammable material (paper, plastic etc.) in large quantities, some of it already burning, fell with the rest of the towers down and into the crater. The fire spread from the bits and pieces that were incandescent to the other flammable material mixed up with other debris.
You've missed the point. The upper block of the North Tower was where the fire was. You're suggesting that in the process of collapse, the upper block somehow maintained its integrity and pushed all else out of its way and made its way down into the basement. The upper block was the most weakened and damaged part of the Tower, and yet you believe that it made its way to the basement. How is it that you believe that in a battle between the damaged and weakened upper block and the lower undamaged core structure below it, the upper block prevailed and made its way to the basement?
Quote:They didn't start pooring water in the crater immediately anyway. The fire raged for a while in that crater, unattended by a devastated and overwhelmed firefighter corp.
Between 9/11 and 9/21, three to four million gallons were dumped on ground zero. This does not include a water leak from the Hudson River by way of outfall lines into the basement or bathtub. There were also leaks from broken water-mains, as well as problems with the water table because of a hole in the slurry wall. The combined water from hoses, rain, and aforementioned leaks collected at the bottom of the bathtub.
So, again, how did the fire from the upper block of the Tower, make it all the way through the intact core structure below it and then plunge into the bathtub area? And even if we allow for that . . . anomaly, how was steel being melted with all the water and fire retardants that I've just mentioned being dumped into that area?
Perhaps now we can move on to why, after a "certain point", the core structure offered no resistance to speak of, and how the energy required to pulverize everything in the building below the impact zone, and the energy required to produce the lateral ejections as seen in photos and videos of the collapse still allowed for enough reserve energy to allow for a virtually freefall descent through the course of most resistance.