tower crane QTZ50 tower cranes Model: QTZ50; tower cranes for sale Jib length: 50m; mobile tower cranes Height: 37.5/ 33m; construction tower cranesTip load: 0.9~ 1.0t; china tower cranes Max load: 4t. tower cranes suppliers Section of mast section: 15002 x 2200 16102 x 2500 tower crane manufacturersMain chord of mast section: 140x140x14 160x160x14/ Q235B or Q345B