Abstract
The reasons for the ever-increasing ship traffic and ship size are given, the site-dependent choice of high-level fixed bridges versus low-level movable bridges is discussed and the different types of movable bridges are described in general terms in an introduction. Next, one lift bridge, three swing bridges, and one bascule bridge are described in more detail, including older bridges that at the time of being designed and built had innovative, unique features. The examples comprise bridges in Brazil, Egypt, France, Germany, Iraq, Malaysia, Spain, and Turkey. At the end, a totally new type of bascule bridge is presented: the double balance beam bridge (DBBB). The design of movable bridges requires an uncommon and extremely demanding interaction between civil, mechanical, hydraulic and electric engineering; here we concentrate on the civil engineering aspects.
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