The most practical method of erecting the SkyPark was to prefabricate each of the 14-main steel segments off-site, truck them to the site, lift them into place and assemble them on top of the tower. Taking a cue from bridge building, the design team engaged Swiss/French company VSL to assist with the complicated lifting. VSL employed a strand jacking process (the largest and longest of its kind), utilizing hydraulic jacks to lift the box girders to the top of the towers and slide them into place. The two largest sections to be lifted were the 80-meter (262-foot) long, 1.70-metric ton (1,400-ton) pair of box girders that would form the cantilever. At a lifting speed of 14 meters (46 feet) per hour, it took over 16 hours to lift the girders and slide them into place (see Figure 11).