| 摘要 |
An apparatus, system and method for raising and lowering a building, wherein a yoke receives the end of a building lifting beam and travels vertically on a vertical guide. The yoke is connected to a jack, and the yoke and jack are provided with independently releasable locking means. In operation, the jack is locked on the guide at an initial supporting position to allow the yoke to move, and then the yoke is locked on the guide to allow the jack to move to a new supporting position on the guide, allowing the yoke to climb up and down the guide through alternating component lockings and movements. |
