| 摘要 |
PROBLEM TO BE SOLVED: To provide a storage staircase that is subjected to addition of a storage function while simplifying a structure.SOLUTION: In a storage staircase, a plurality of treadboards are vertically arranged at predetermined intervals between stringers. Each of the plurality of treadboards has a stepping part that is formed by making a front end of the predetermined treadboard extended forward with a predetermined width from a front end of the treadboard higher by one step than the treadboard, and a storage part that is formed by making a rear end of the predetermined treadboard extended backward with a predetermined width from the front end of the treadboard higher by one step than the treadboard. |
