| 摘要 |
The disclosed staircases are characterized in that they are provided with supports or hangers (4). Said supports and hangers traverse the steps (5) through holes (9). Posts (3B) traverse the steps (16) through holes (15) provided in said steps. The upper end of the supports or hangers (4) is provided with a slot (10) which receives the stiffening element (1) to which is fixed astride an upside down U-shaped longitudinal (2) with rounded edges. The assembly of these modules is fixed by means of fixing elements. The steps (5 or 16) bear on the pegs (6 or 7) which are inserted in the holes (9a) provided in the supports or hangers (4) as well as in the posts (3B or 3E).
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