ROOF FLOOR BOARD FOR MULTISTORY PARKING GARAGE AND ITS DRAINAGE SYSTEM

摘要

PURPOSE:To prevent rain water from leaking out to the lower floor of a multistory parking garage and to efficiently drain the rain water. CONSTITUTION:The open face of the upper face of a rectangular frame-shaped frame body 5 is spreadly provided with plates 6,7 having a nearly U-shaped section. The plate 6 on one side is formed into a gutter-shaped part 13 to drain rain water. The plates 6 are spreadly provided on both sides with the gutter- shaped parts set inside, and the plate 7 on the other side is spreadly provided on the central part between both the gutter-shaped parts. A groove between the plates 6, 7 serves as a drainage groove 19. The upper part of a side plate 3 corresponding to the end of the drainage groove 19 is provided with a notched part 20 for draining the rain water. In addition, a hole 21 is drilled on the part corresponding to the end of the gutter-shaped part 13 of a side plate 3. The rain water having fallen on the upper face of a floor panel body 1 flows into the gutter-shaped part 13 through gaps between the drainage groove 19 and the plates 6, 7, and is drained outside through the notched part 20 and the hole 21.