| 摘要 |
PROBLEM TO BE SOLVED: To reduce cost by making upper and lower width of all inclined side plate of external stairs and a horizontal side plate in external corridor the same and improve the design property of a joining part of these side plates. SOLUTION: External stairs 10 are joined to an end on one side of an external corridor 20. Upper and lower width of an inclined side plate 11 of the external stairs 10 becomes equal to that of a horizontal side plate 21 of the external corridor 20. Moreover, the height of a lower end of a joining end face of the inclined side plate 11 is made equal to that of a lower end of a joining end face of the horizontal side plate 21 to join the side plate 11 and the side plate 21 vertically. Moreover, an upper end part of joining end part of the side plate 11 is formed in the shape cut by an extension line of an upper side of the side plate 21. By joining the inclined side plate 11 and the horizontal side plate 21 as mentioned above, the holding of a joining part does not become complicated and troublesome. That is cost is reduced by making upper and lower width of the side plates 11, 21 the same and unifying members, and the design property can be improved. |
