QTZ63(5010) tower crane 1. Max. load: 6t,max load moment is 544kn·m. 2. Jib length: 50m. 3. Tip load: 1.3t 4. Free standing height: 30m 5. Max. height: 120m 6. Size of mast section: 1.6*1.6*2.5 reliable performance,good looks, reasonable price and advanced safety features, also is the ideal construction machinery of Small and medium-sized construction enterprise.