The steel jacket is a figure of eight shaped steel structure measuring 90m long, 43m wide and 8.7m high, with a dead weight 1,750t. Allstone used 10 Tianjie TJ-S2.43 SPMTs, with 60 axle-lines split up into three groups. The total weight of the load, including load spreading beams and the jacket, reached 2,045t.
Tianjie’s TJ-S2.43 SPMTs use an auto hydrostatic balance and computerized control system, ensuring that the load was spread equally with 34.1t on each axle line. The SPMTs have a maximum capacity of 40t per axle line
There will be around 180 axle lines of Tianjie SPMTs working on the HZMB project until the end of 2013.