| 摘要 |
PROBLEM TO BE SOLVED: To provide a tread structure of stairs excellent in safety, at a low cost. SOLUTION: For the tread structure for putting a cover member 20, having an L-shaped section together with the upper surface section 21 and the front section 22 on an upward corner section of the front end section of a tread 10, the cover member 20, is constituted of a flexible synthetic resin, and further, a notch section 13 is provided to the corner section of the tread 10, and the cover member 20 is mounted, so as to cover the notch section 13 to form a buffer space A covered with the soft synthetic resin in the corner section.
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