High Quality Content by WIKIPEDIA articles! The 2003 Chicago balcony collapse was a disaster that occurred on June 29, 2003 in the city of Chicago, resulting in the deadliest porch collapse in United States history. An overloaded balcony collapsed during a party in an apartment building, killing thirteen people and seriously injuring fifty-seven others. The ensuing investigation was highly critical of the way the balcony was built, finding a large number of errors in its construction which ultimately resulted in the collapse. However, the building`s owner continues to blame overcrowding on the balcony for its complete structural failure, although he has taken steps to strengthen the balconies at his properties to prevent a recurrence of the disaster. The accident resulted in sweeping inspections of similar structures across Chicago, with 1,260 cases being actioned by the city authorities.