| 摘要 |
PROBLEM TO BE SOLVED: To provide a spring-up type steel-made inspection bridge taking measures to cope with snowing, at the same time, lightening it as much as possible so as to build it by human power only and constructing it as divided/ built-up structure. SOLUTION: A spring-up type steel-made inspection bridge is equipped with bridge girder units A connecting a plurality of vertical and horizontal girders in the shape of a rectangular frame, walking board units B having size capable of being piled up on them to mount, hinges C connected to the side ends of the bridge girder units A in a state capable of freely rising and falling and a fixing device D for fixing a rising state. Then, the walking board units B stretches net or lattice-like treads to rectangular frames. A plurality of kinds of bridge girder units having different lengths are prepared, and they are properly combined with each other to connect them so as to have a required length.
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