ZTL546（ZTL6062）是中天智能塔机的主力机型。它最大起重量为24t，端部吊载6.2t，工作幅度60m，独立高度可达42.3m，标准节可配置ZL25、ZH205B。

        ZTL546（ZTL6062）is the main type of ZTM intelligent tower crane. It has a max load of 24t, a tip load of 6.2t, a jib radius of 60m, and an independent height of 42.3m. The standard mast section can be equipped with ZL25、ZH205B.

       中天动臂式塔式起重机尾部回转半径小，在拆建改建工程中，可有效避免塔机起重臂与周围建筑物相撞情况的发生，适用于场地狭窄的工地，并可在高层建筑施工中发挥其独特优秀。它具有超大起重力矩，作业幅度广，适合钢结构高层建筑施工需要。动臂式自升塔机采用回转平台机构新型设计，可有效改善受力状态，增强水平刚度。

      During the demolition and reconstruction projects, the small tail swing radius of ZTM luffing-jib tower crane can effectively prevent the boom of tower crane colliding with the surrounding buildings. It applies to the site with narrow space, and can play its unique advantages in the high-rise building construction. With super large lifting torque and wide operating range, it also applies to steel structural high-rise building construction. The luffing self-lifting tower crane adopts new design of slewing platform mechanism, which can effectively improve the forced state and enhance the horizontal stiffness.