| 摘要 |
<p>The roller-mounted free standing elevated working platform is of a sectional three dimensional rectangular framed construction, vertical end panels being of a one piece ladder frame form providing end support for deck planks. A one piece rectangular ring frame ties the feet, havin node sleeves which house spigot and socket joints between the ladder frame legs and the roller fittings. Rails secured by cross bolted yokes tie the tops of the ladder frames including integral light guage guard railing and providing anchorages for transverse safety chains.</p> |
