| 摘要 |
An apparatus for the safe, cost-efficient disassembling of a sectionalized tower crane boom is provided that enables disassembling of the boom while the boom is at terminal heights. The disassembling apparatus includes a working platform that may be detachably coupled to an inboard boom section, a pair of independently controlled jibs for lifting and supporting the outermost boom section, and a supporting structure and puller hoist for shifting the position of a detached boom section to a position wherein the center of gravity of the detached section may be generally vertically aligned with the center of support for the disassembling apparatus. Vertical alignment of the disassembling apparatus' and the detached boom section's centers of gravity is provided to assure safe and stable lowering of the apparatus and detached boom section. |
