| 摘要 |
The flight of steps on a steel support structure, has a beam support carrier as a central carrier (30). Spaced plates (23), at the carrier (30), each support the steps (5). Each step (5) on each under plate (23), is positioned by at least two rotary axes (27,28). The walking surfaces (22) on each step (5) are of artificial stone, wood overlays or they are metal steps. |
