| 摘要 |
PROBLEM TO BE SOLVED: To prevent the edge part of a floor pan from undulation and flexure and to heighten waterproofness by bending the edge part of the floor pan downward to provide a downward rib edge part hangingly, and erecting a wall panel and a door frame on the upper face of the edge part of the floor pan along the edge part. SOLUTION: The edge part of a floor pan 1 is bent downward to integrally provide a downward rib edge part 4 hangingly. The upper face of the edge part of the floor pan 1 provided hangingly with the downward rib edge part 4 therefore becomes a flat face without anything protruding upward. A wall panel 2 and a door frame 3 are erected on the upper face of the edge part of the floor pan 1 along the edge part. At this time, the door frame 3 can be erected in an optional place on the upper faces of three-side edge parts of a washing place side part of the floor pan 1. The installed position of the door frame 3 can therefore be set corresponding to various different construction sites, and the increase of rigidity of the floor pan edge part can prevent undulation and flexure and heighten waterproofness. |
