| 摘要 |
PROBLEM TO BE SOLVED: To provide a temporary stair with a stair landing capable of being temporally installed in one span among supports erected by legs and the multistage construction method of the temporary stair, in which high-place assembly operation in a shaft is not required. SOLUTION: A floor material 30 for a scaffolding adjacently having a floor section 40 for a stair landing and an open ceiling section 50 in a double level is stretched over beam materials 20 among supports 10 erected by legs at four corners. The floor section 40 for the stair landing of the floor material 30 for the scaffolding is vertically arranged alternately. The upper end side of a stair 60 is connected on the open ceiling section 50 side of the floor section 40 for the stair landing of the floor material 30 for the scaffoling at an upper stage, and the lower end side of the stair 60 is placed on the floor section 40 for the stair landing of the floor material 30 for the scaffoling at a lower stage or a ground section and a temporary stair A is mounted. A plurality of floor materials 30 for a narrow-width scaffolding may also be disposed as the floor material 30 for the scaffolding at each stage. The floor materials 30 for the narrow-width scaffolding are stretched vertically between height corresponding to one stage of the multistage temporary stair bilaterally alternately, and the stair may also be set up between the floor section 40 for the stair landing of the floor materials 30 for each scaffolding and the open ceiling section 50. A beforehand assembled temporary stair is fixed into a shaft, temporary stairs for extension are extended to the beforehand assembled temporary stair while excavating the ground bottom section of the shaft, and the temporary stair A is constructed in the shaft. |
