Rainwater guide stairs, precast concrete blocks and blocks for rainwater guide stairs

摘要

To provide a rainwater guide stair, a precast concrete block and a block for rainwater guide stair, capable of effectively draining water without attaching a separate member to a stair and capable of efficiently draining rainwater by reducing the possibility that rainwater flows like a waterfall.SOLUTION: A rainwater guide stair 1 is provided with a step nose part 10 formed in a convex curved surface, a riser plate part 30 which is communicated from the step nose part 10 and is formed to be inclined backward from the upper side to the lower side, a tread surface 20, and a drain part 40 which is formed lower than the tread surface in the vicinity of the riser part or the riser part of the tread surface 20, and the boundary between the drain part 40 and the riser plate part 30 is formed of a concave curved surface.SELECTED DRAWING: Figure 1