This is a channel-bridge over the River Elbe and joins the former East and West Germany, as part of the unification project. It is located in the city of Magdeburg, near Berlin. The photo was taken on the day of inauguration.
It only needs to be designed to withstand the weight of the water! Why? A ship always displaces an amount of water that weights the same as ship, regardless of how heavily a ship may be loaded.