塔式起重机具有起升高度大、有效幅度宽、工作面广的特点,除了完成吊装作业外,还能完成垂直和水平运输任务,因而在建筑工业化中占有十分重要的地位。目前,塔式起重机已被广泛使用于工业和民用建筑中,对于高层建筑的发展,其作用更为显著。近年来,汽车起重机虽然得到较快的发展,但因制造加工比较复杂、售价与使用费较高(与同等起重能力的塔机相比一般高出2至3倍),因此在建筑施工中不能与塔机竞争, Tower cranes have the characteristics of large height lifting, wide effective range, and wide working area. Apart from completing lifting operations, they can also complete vertical and horizontal transportation tasks, thus occupying a very important position in the industrialization of buildings. At present, tower cranes have been widely used in industrial and civil buildings. Their role in the development of high-rise buildings is even more significant. In recent years, despite the rapid development of truck cranes, the construction of cranes is relatively complicated, and the selling price and usage fee are higher (2 to 3 times higher than tower cranes with equivalent lifting capacity). Can not compete with the tower crane