| 摘要 |
PROBLEM TO BE SOLVED: To provide a drainage structure for a building capable of totally simplifying a structure for draining the water such as rain water. SOLUTION: End parts 6A, 7A of a side beam 6 and a girder 7 as a structural material of a balcony as a building, are abutted and joined to a column 4 through intermediate members 11, 12, and a water collecting pit 29 composed of a water collecting pit body 30 and water collecting pit auxiliary bodies 31, 32 is mounted along the longitudinal direction of the column 4 at a lower part of a place where the end parts 6A, 7A are gathered. The rain water flowing down from the drains 42, 43 of the side beam 6 and the girder 7 also used as a gutter member, is received by the water collecting pit auxiliary bodies 31, 32 and discharged to the external of the balcony, and further the water collecting pit auxiliary bodies 31, 32 are slidable in the circumferential direction of the column 4 to the water collecting pit body 30 to be moved to the positions of the side beam 6 and the girder 7 mounted at an opening angle corresponding to the shape of a site.
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