Holy shit my facebook's supposed to be private!View attachment 58373 It was an inside job I tell ya!
But seriously, how does 16% of the weight already supported, collapse the other 84%?
I'm probably wasting my time here but you have a poor understanding of structural engineering. They floors pancaked. The floor just under the crash site couldn't hold the above 16%. It collapsed and added to the weight which collapsed the floor under it, which added to the weight and so on until eventually the collapsing weight was now 50% of the total weight, and it grew from there to eventually 99%.