| 摘要 |
<p>A fall-prevention ladder (100) comprising:
a single central stile (40) or a pair of lateral stiles, parallel to one another, destined to be fixed rigidly to a building structure;
a plurality of rungs (1) rigidly fixed to the central stile or lateral stiles, each rung having a substantially plate-shaped conformation and a longitudinal axis (2), the rung comprising a central wall (3), at least a first lateral wall (4) and a first bend (10) substantially parallel to the longitudinal axis interposed between, conjoining and demarcating, the central wall and the first lateral wall, where the rung is fixed to the stile or stiles by means of a respective weld (38) developing on at least a face of the two faces of the rung along at least a portion of the edge of the rung adjacent to the respective stile, and where each rung exhibits a pair of drain holes (37) passing through the central wall, the minimum distance of the edge of each drain hole from the stile that is closest being less than or equal to 3 cm.</p> |
