LSSBB
Devilish Dictionarian
It shouldn't have.
MM
Ahhh, there's the rub. Shouldn't have, according to what?
Fire causes heat.
Steel expands under heat.
Steel expanding under heat will put stresses on constraining surfaces.
The constraining surfaces impacted by expanding metal will deform if there is no equal and opposite force to balance them.
Sufficient lateral forces on constraining columns will induce them to fail.
Failure of one column carrying a load transfers more load to other columns, falling loads from that column will also impact other columns, and a cascade of damage occurs.
All of this collapsing material goes somewhere... to the bottom of the building, where it has to go somewhere, knocking out the perimeter columns at their base.
The faces of the building, no longer supported, fall down.
Should have failed, then.