In order to lift the 200t load, the MSG team decided the best crane configuration for the lift consisted of using a boom length of 25.5m and a counterweight of 100t on the AC 700-9 all terrain crane. The star-shaped outrigger bases, which were extended to a length of 12m, provided the necessary stability.
For the AC 500-8 all terrain crane, the team used a boom length of 24m and a counterweight of 140t and extended the outrigger bases to a length of 9.6m. The AC 500-8 crane picked up the tunnel boring machine drive system with nine-part reeving at the hook.
Working together, the AC 500-8 and the AC 700-9 lifted the tunnel boring machine drive system bit by bit to a height of three metres.
“It all came down to how our two crane operators were able to work together with utmost accuracy. They had to stay perfectly coordinated in order to ensure that the weight would remain properly distributed between both cranes at all times,” explains Reinhard Schmitt, crane operator of the AC 700-9.
This made it possible to use a working radius of 14m to lift the drive system off from the heavy goods vehicle, move it over the ship, and then carefully place it.
