... ,Now we offer tower cranes with maximum lifting loads form 2.5t to 16t, which include QTG25, QTZ25, QTZ31.5, QTZ40 ... series 3008Maximum rated Torque(KN.m)250Maximum lifting load(t)2.5Maximum working amplitude (m) 30 Hoisting Height (m)Independent 25 ... mast∠140x10 ∠125x10∠100x10 Q235BParallel height of lifting beam (mm)1040 the loading and unloading in the workshop of factoryQTZ 25 Series tower crane