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[–]thefadd 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (1 child)

There are no “core columns.” The core has nothing to do with how those buildings keep themselves up. Steel buildings are built using exoskeletons propped from outside.

The buildings’ external walls collapsed. Otherwise, the collapse would have looked differently. That’s why the fire argument holds no water.

[–]raven9 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

The steel core strcture was integral. The floor trusses were suspended between it and the perimeter steel structure.