Throughout the summer, a crane—perched on a barge in the Chicago River adjacent to the project site and with a ringer rated at 660 tons—has been erecting steel for the building. But even with a colossal 30-ton lifting capacity and a reach roughly equal to a city block, it was still unable to lift some of the largest pieces for the project, and some of the parts that would typically be fabricated in the shop had to be left off and finished in the field.