Stair structure, stair structure construction method, main member of stair structure and intermediate member of stair structure

摘要

PROBLEM TO BE SOLVED: To make an overall width of a staircase structure variable.SOLUTION: In a contracted state, a stair landing 400c in a contracted state is formed by connecting a stair landing member 202c of a main member 200c with a stair landing member 203d of a main member 200d without interposing an intermediate member 300c between the stair landing member 202c and the stair landing member 203d. As such, a width of the stair landing 400c in the contracted state is made narrower than a width in an enlarged state. A stair member 201c ascending toward the stair landing 400c is integrated with the stair landing member 202c and a stair member 201d descending toward the stair landing 400c is integrated with the stair landing member 203d. As such, a width between the stair member 201c and the stair member 201d in the contracted state is made narrower than a width in the enlarged state by connecting the stair landing member 202c and the stair landing member 203d to each other without interposing the intermediate member 300c. As a result, an overall width of a staircase structure 100 is made variable.SELECTED DRAWING: Figure 2