In order to facilitate the disassembly of the internal climbing tower cranes, our company has independently developed a complete series of derrick cranes combined with the highest design standards in Europe. The economical and reasonable construction schemes of dismantling internal climbing tower cranes can be realized. Compared with the traditional tower crane dismantling method, it has the advantages of convenient construction, simple operation, safety, reliability, complete self-disassembly and so on. Derrick cranes of all kinds of tonnages can provide comprehensive roof disassembly and assembly schemes to achieve the smallest workpieces carried artificially.