| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a grating and its manufacturing method which can change a width of a second bearing bar in a height direction, and can adjust a height position of the second bearing bar by employing means which uses a cut of a main first bearing bar, or a cut of a third bearing bar having the same irregularities on its upper face as the second bearing bar.SOLUTION: A grating 100 comprises a first bearing bar 11 processed into an arbitrary surface shape at its upper face, and having irregularities, and a second bearing bar 12 formed by longitudinally cutting the first bearing bar 11, and formed shorter in a width of a height direction than the first bearing bar 11. The second bearing bar 12 is arranged between the first bearing bars 11 by one or two or more pieces.</p> |
