| 摘要 |
A lifting and shoring jack assembly includes a main support assembly having a main column (3), a jack screw (4) slidably mounted within the main column, and a jack nut (5) engaged with the jack screw and bearing on the end of the main column. A load plate (6) mounted at the free end of the jack screw (4) facilitates engagement of the jack assembly with a load to be supported. Extensible side braces (7) are pivotally mounted on the main column (3), and also include load engaging plates (6A) for load-bearing attachment to the load to be supported.
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