Weeks 533 is a 500-short-ton (454 t) capacity Clyde Iron Works model 52 barge-mounted crane which is the largest revolving floating crane on the East Coast of the United States. It was originally ordered for bridge construction and has since been used in several notable heavy lifts.

A crane vessel, crane ship, crane barge, or floating crane is a ship with a crane specialized in lifting heavy loads, typically exceeding 1,500 t for modern ships. The largest crane vessels are used for offshore construction.