39 Specials Specials for the Maasvlakte 2 Harbour of Rotterdam This Block Clamp is specially developed and produ- ced for PUMA by TGS for placing concrete blocks with a weight of approx. 42 ton in to the sea at the 2nd Maasvlakte by Rotterdam NL. TGS produced all grabs for the 2nd Maasvlakte , about 25 in total. This civil engineering project jointly managed by Van Oord and Boskalis, they will reclaim land for the use of the Port of Rotterdam. One of the main tasks for TGS was to restack 20.000 blocks weighing 43.000 kg . The blocks which were used for the creation of the first defence wall in the early 1930, needed to be lifted out of the water and realigned. The grab/clams for replacing had to be designed at a maximum empty weight of 5mt.