When possible, they will unbolt components. Otherwise, they will use band saws. All work will be done during daylight hours and all workers will be in view of each other at all times, says Kielar. Derricks and other equipment were assembled over the Aug. 1 weekend. Initially, for expediency, instead of employing the approved scheme, workers, using independently hung safety lines, walked on the runways and on a work platform installed across the net's doughnut.
Workers first remove all loose debris on a level.
Then, they dismantle the scaffold, starting at its north face. The last thing to be detached are the struts, says Velivasakis. In New York City, where zoning requires high-rise building setbacks, external hoists with substantial backstructures are common. This structure was designed by ubs, also the designer of scaffold towers for restorations of the Statue of Liberty and the Washington Monument, for each platform to withstand 100 psf. A total of two platforms or the equivalent can be fully loaded at any one time.