| 摘要 |
<p>The present invention relates to a tread for stairs using useless materials in grating, made of a large lattice structure to allow drainage and, more specifically, to a tread for stairs using useless materials in grating to allow the useless materials remaining after grating to be used for a thread for stairs. To achieve this, the tread for stairs using useless materials in grating comprises: a plurality of tread bars made of a bearing bar as a useless material in grating; and a tread main body which has one or more joints which are alternately inserted and fixated to the tread bars to make up the treads by alternately fixating the tread bars and the joints.</p> |
