In an unprecedented engineering feat, New York City high-rise crews on May 11 successfully hoisted a 150-ft-long replacement luffing boom to the roof of One57, a 1,100-ft-tall residential building under construction in midtown Manhattan, and attached it to an existing tower-crane mast. The new crane is now in service.
In an interview with ENR, construction manager Lend Lease explains how workers pulled off the task, which engineers say has not been done before at such heights.