| 摘要 |
PROBLEM TO BE SOLVED: To provide a cover body for side ditch which reduces the weight sufficiently, while having sufficient strength, and a method of producing the same.SOLUTION: A cover body for side ditch includes a concrete upper plate to close the opening of a side ditch, and a plurality of bar-shaped fiber-reinforced plastic materials, disposed in parallel at predetermined intervals in a top view, inside the upper plate in thickness direction and with a predetermined covering from the lower face of the upper plate. |
