| 摘要 |
A drainage board assembly is provided to prevent deformation of an edge region when installed. A drainage board assembly comprises a drainage board body(10) having the shape of a quadrilateral plate, a plurality of main supports(20) protruding from the drainage board body and forming drainage spaces(7) between a given floor and the drainage board body, a plurality of hooking steps(30) protruding from the drainage board body along one or more side of the drainage plate body, a plurality of auxiliary supports(40) formed along a side opposite the side along which the plurality of hooking steps is formed and holding the hooking steps of another adjacent drainage board body, and a heat isolating space(25) forming an air layer under each main support to isolate heat from the floor. |
