The general contractor, crane owner and operator at Columbus Square face fines of up to $25,000 after a piece of a crane crushed a sidewalk covering this afternoon. There were no injuries as a result of the incident, which occurred at 775 Columbus Avenue, as The Real Deal first reported this afternoon. The 13-story rental building is under construction as part of the new five-building Columbus Square complex. The accident occurred while workers at the site were dismantling a mobile crane, said a spokesman for the Department of Buildings. One of the crane’s counterweights — used to balance the load the crane is lifting — struck a sidewalk shed, causing part of the structure to collapse. [more]