Quote:
Originally Posted by Doc Howl  The impact had nothing to do with the collapse. Where the hole was is irrelevant. |
The hole from the impact on floors maybe 3 to 9, allowed air in to feed the fire. The NYFD stopped fighting the fire at Noon, and the fire burned, getting hotter, till WT7 collapsed at 5:30 PM. Had there been no impact and no hole, ther might have been less air to feed the fire, and the fire might have extinguixhed, or not burned as hot, if ther had been less air from the corner of WT7.
Molten, smoldering metal was found days after the collapse. Molten metal is not from an explosion. Moletn metal is from the beams, wrapped in 2 hour fire retardent material. The fire burned more than 2 hours and weakened the beams. Once enough beams were weak, the weight started to compound on the strongest floor, which gave way to the weight, then there was too much weight for each succssive overloaded floor. Not to mention rivits popping and welds bending.
..