| 摘要 |
PROBLEM TO BE SOLVED: To prevent rainwater from entering from a part between a girder or the like even if a long period of time elapses. SOLUTION: In a balcony 1 in which a common joist member 14 is provided in a scope surrounded by a side wall W, an end girder 4, and a front girder 6 and floor plate members 11 are spreaded on the common joist member, the floor plate member is a rectangular floor plate member formed by covering a core member by rubber, a rising wall 26 made of rubber is integrally formed over whole length of a side fringe on the side fringe, protruding bars 27 continuous over whole length on the rising wall are formed on an outer face of the rising wall, and the rising wall is fixed on three faces, namely, side faces of tight and left end girders and a side wall face or a side face of the front girder while the protruding bars come into pressure contact when the floor plate members are to be sequentially connectedly laid on the common joist member.
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