McLaren Observes Over 25 Tower Cranes for NYCDOB

A plumbness check was performed on this tower crane, located at 640 8th Avenue, on April 15.

McLaren Engineering Group answered the New York City Department of Buildings’ (DOB) urgent call the only way it knows how: with efficiency and quality.

In the wake of a March 15 accident at East 51st Street, the DOB tabbed McLaren to assist in the emergency inspection of its tower cranes at various sites throughout Manhattan, Brooklyn, and the Bronx. The inspections began on March 29 and are currently ongoing, with as many as 12 different McLaren engineers being dispatched throughout the City to execute the necessary observations.

To date, McLaren has observed a total of 28 cranes at 23 unique sites.

McLaren responded to the DOB’s immediate request as part of the firm’s on-call contract with the DOB. The crane observation’s scope includes peer review of drawings and procedures; observation of crane tie-ins, crane masts, and crane mast foundations; and witness of the erection, jumping and dismantling of the assorted cranes. All data will be compiled into a comprehensive report, which will include recommendations and follow-up sketches/plans.

With over two dozen cranes inspected, McLaren has developed a non-destructive testing program for the cranes’ structural elements. This program calls for visual inspection of all manufactured crane parts, crane tie-ins, and the welds associated with each.

Primarily in Manhattan, the cranes are of various types, ages, and styles. As of April 26, 28 cranes had been observed, including 15 routine inspections, 18 jump observations, four new crane assembly observations, four crane disassembly observations, and 17 plumbness checks.