| 摘要 |
PROBLEM TO BE SOLVED: To provide a floor structure easy to construct as a floor structure of a veranda or balcony of housing, excellent in drainage and design in laying surface, and in particular excellent in the outer looking of rear surface of a base. SOLUTION: Placement and fixation of folded-plate-like board, having an uneven surface of recesses and protrusions are mounted onto a base composed of front/rear side beams and both gable members to thereby form a floor substrate, and thereon floor decoration members are laid so that water flowing down from the decoration members are received in the recesses of the folded- plate-like boards for drainage. Drainage ends of the recesses of the boards face a gutter part so that the drainage thereof may flow down to a gutter part formed at the front or rear beam, and lontitudinal opposed ends of the boards are positioned at the front and rear beams. Floor joists are laid on both the beams, and the joist may be fitted in recessed portions on the rear sides of the protrusions of the boards.
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