| 摘要 |
PROBLEM TO BE SOLVED: To strengthen a resisting force against load even if it a simple and small elevated crossing bridge, and prevent failure such as collapse by an earth quake by providing the dedicated elevated crossing bridge for light cars other than heavy cars on a railroad crossing, an intersection, a small river or the near place thereof where a traffic jam is violent. SOLUTION: Right and left bending parts of a steel plate surface 5 wherein a central part is high are fixed on steel columns or concrete parts in right and left bridge piers. An incision part is provided on an upper part of the center of the steel plate surface 5, and a vertical surface of a steel beam 12 fitted pinching in the incision part is bend downwardly at right and left parts raised at the central part by using joints 20 to be fix to the concrete part. Steel lumbers such as the steel beam and support steels (an upper part of the center is attached on a lower surface in the steel beam) under a lower surface of a central zone for road traffic are made thicker. Moreover, it is constituted to easily with stand a load by especially using the steel plate surface 5 for only the part.
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