Drawing: The buildup of the steel plinths; the total height is 1600 mm and a 400 mm reinforced concrete slab will transfer the forces into the bedrock. Installation of steel plinths As mentioned, all CJ70 design units have the same footprint, but the steel plinths must be installed very precisely in the footprint, both horizontally and vertically. Therefore, we have compiled a very detailed drawing (verified by third-party company) of the theoretical footprint. We must be able to have a touchdown on all nine steel plinths at the exact same time. The maximum deviation from the theoretical footprint should not exceed 40 mm in the horizontal plane. The height differences of the steel plinths within one leg should not exceed 18 mm, as this would cause RPD (Rack Phase Difference) problems. After installation of the steel plinths and before opening of the dock gate, two independent survey companies finally verified the footprint. We managed to install the steel plinths perfectly within the tolerances. Steel plinths are being submerged for forward leg – note the red top plate
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