The work was carried out by coupling our ZEEVANG and ZIJPE together lengthwise so that we had a surface area of 65 x 22.80 meters. Two heavy load spreaders were constructed on this each with two towers. The sliding system belonging to the customer was placed on these towers. 

A difficulty with removing the old sections and replacing these with the new bridges was that we had to position ourselves across the current where there was a maximum draft of 2.85 meters. We kept the barge in position using two boats, and two heavy 2500 kg delta flippers with 2 x 25 ton winches kept the pontoons in position in the current. We used two smaller winches to position the pontoons precisely.
The maximum current was calculated at 1.5 m/s. This was not a problem when removing the old sections and sailing the first new bridge section back into position. 

But then it began to rain in Austria and the current became much too fast. Eventually, after a delay of two weeks the last piece was sailed into position with the current back down to exactly 1.5 m/s.