Reply #99: I think that's called an evasion of the question

[LARED]

To be specific let me pose the question this way.

The core columns are connected to the perimeter columns via floor joists at each floor. The floor joist connections are simply a few small bolts holding the joist in place on a steel support connected to the column. These connection are designed in a way to allow movement for expansion and story drift as the wind moves the building. The floor system does stiffen the whole structure, but it is not designed to withstand dynamic tension or compression like you would see in a collapse.

So, the question is what is wrong with my theory and perhaps you can explain why you think your tree truck analogy wholes water, and why you think the top section should have stayed intact.