| 摘要 |
<p>A collapsible metal cage containing a plurality of metal main bars (52a-d) rotatably connected to a plurality of links (50), and a method for using the cage. Connecting means (54) are provided for the rotatable connection between the main bars (52a-d) and the links (50). The method comprises assembling the collapsing cage by rotatably connecting the main bars to the links, collapsing the cage for ease of transport, transporting one or more cages to a construction site, expanding the cage to the required shape, and installing the cage.</p> |
