Szukana fraza: [Abstrakt = "The design of moveable bridges for pedestrians and bikes requires an analysis and solution of many complex problems. Important factors are geotechnical issues – laying foundations on weak grounds. It is necessary to fulfill the requirements not only of the ultimate limit state, but also the serviceability limit state for a moveable bridge to function correctly. Moreover, to design the piston mechanism it is vital to cooperate with a mechanical engineer. Another important factor described in the paper is the durability of particular elements of the whole structure, what influences the durability of the bridge. Moveable bridges can be generally divided into three groups\: bascule bridges, swing bridges and vertical\-lift bridges. In the paper the Authors discussed only a bascule type of bridge, including a detailed description of the lift mechanism. As an example of the discussed problems, the Authors presented a reconstruction design process of three footbridges into pedestrian and bike moveable bridges."]

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