DRAIN BOARD AND STRUCTURE FOR PLANTING IN BUILDING USING THE SAME

摘要

PURPOSE: A drain board and an afforestation structure using the same are provided to be steadily laminated to withstand big loads enough. CONSTITUTION: A drain board(100) comprises a plurality of column portions(110), one or a plurality of drainage channel portions(120), a plurality of uneven joints(130). The column portions are arranged side by side. The drainage channel portions form a drainage channel between the column portions side by side with the column portions. The joints are formed along a direction crossing over one side of each column portion in order that a plurality of the drain boards is connected each other.