| 主权项 |
1. A lifting device for lifting an upper portion of a building which comprises a roof, the device comprising a base plate arranged to be mounted to an edge region of a support and a lifting platform attached to an actuator and capable of vertical movement by means of the actuator, wherein the base plate has a first portion arranged to abut a substantially horizontal face of the support and a second portion arranged to abut a substantially vertical face of the support, and the actuator is adjustably mounted to the base plate such that the position of the actuator is horizontally and/or vertically adjustable relative to the base plate to ensure a plumb lift. |
