The crane collapse that killed two workers in Manhattan last week may have been due to a rebuilt part removed from another crane because it was worn out. Investigators are focusing on a failed weld on the crane's turntable. The turntable helps the crane to change direction and swivel.

In May 2007, the turntable was removed from another crane after a construction worker noticed it was cracked. New York Crane & Equipment Corp., the crane's owner, installed it on the crane that collapsed after having a welding company fix it. According to Bill J. Smith, president of claims and risk management for NationsBuilders Insurance Services, the repaired turntable was inspected and tested twice before it was installed. In addition to focusing on the cracked turntable, investigators are also looking into the frequency of inspections and maintenance on the crane. The crane is reportedly 24-years-old.

Prosecutors have launched a criminal investigation, and three other agencies are looking into the collapse. This is the second collapse of a crane in Manhattan in the last two-and-a-half months.

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