| 摘要 |
PROBLEM TO BE SOLVED: To provide a cover for a passage, which can bring about a non-slip effect and increase strength. SOLUTION: The cover for the passage covers a section such as an opening of a joint part or a side ditch between the floor surfaces of right and left buildings built via the joint part. The cover is composed of a frame, which is supported on the edge of the opening of the joint part or the side ditch, many bar members made of a metal plate, which are fixed to the frame at prescribed intervals, and plural protrusions which are respectively formed on the top surfaces of the bar members so as to protrude upward at prescribed intervals.
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