The five-storey store had been altered repeatedly, including the addition of an unplanned fifth floor and the relocation of heavy air-conditioning units onto an inadequately supported roof. Support columns had been cut to fit escalators.
On the morning of the collapse, cracks were widening and management was warned. Customers were not evacuated; executives left the building. The structure failed at 5:57 pm, killing 502 people and injuring nearly 1,000.
The disaster led to sweeping reform of South Korean building inspection and criminal liability for construction and management negligence.
Why this event still matters
Historical incidents shape the rules that protect people today — building codes, evacuation policy, warning systems and inspection regimes almost always trace back to a specific disaster. Studying Sampoong Department Store Collapse alongside current events is how preparedness improves.
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