Aug 11, 2019 · For a typical tower crane Maximum unsupported height – 80 meters (265 feet) Maximum Reach – 70 meters (230 feet), Maximum Lifting Power – 19.8 tons (18 Metric Tons), 300 tonne-meters. unterweights – 20 tons (16.3 Metric Tons). If the crane height is more than 265 feet, then some means of sturdy support is required.