Quote:
Originally Posted by Vjo
Not enough to perfectly pancake a metal frame imo.
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They didn't fall over, they fell down.
The concrete floor - which weighed tons - was supported by the core and the outer walls. When the support of the outer walls was gone, there was nothing holding these floors up. One floor fell, falling onto the floor below it, causing a pancake effect.
On top of this, while the the core and the outer walls held the concrete floors in place, the concrete floors helped to hold the other walls in place. When the floors collapsed, they took down the other walls with them.