The world's fastest luffing-to-trolley automatic changing tower crane.

The jib can operate in the range of 10°~87°, the maximum stop angle of the jib in out of service state is 74°( 16m ), which is about 10° larger than the traditional boom. The length of the counter jib is 7.1m. Compared with the luffing crane mode, the trolleying efficiency is increased by more than 50% , and the 50m trolleying distance is shortened from 2 mins to 1 min. Compared with the luffing jib tower crane of the same tonnage level, the lifting performance is about 8% higher and the luffing speed is about 30% higher. The minimum working radius is shorter, which is more conducive to internal climbing  and anchorage installation and removal.