| 摘要 |
The invention relates to a jib/counter-jib structure for a free-standing tower crane, formed by partial sections, each section comprising: a lower lattice structure (9) having a fixed structure and provided with end couplings (11) for connecting same to other consecutive sections; and an upper lattice structure (10) formed by side panels (12) which are joined to the lower lattice structure (9) by means of hinged or removable couplings (13), such that the panels (12) of the upper lattice structure (10) can be removed or lowered in relation to the lower lattice structure (9) in order to transport the section. |
