本文件提供了ISO？4306？3中定义的建筑工程用塔式起重机的分类，并根据标准使用条件给出了钢支撑结构、机构、绳索和其他部件的具体要求，主要表现为: -？工作循环次数； -？载荷谱系数； -？平均位移；和 -？结构或机械计算中使用的系数的附加值。 用于建筑工程的塔式起重机专门配备一个吊钩作为负载处理装置。 对于拟用于其他目的和/或配备其他负载处理装置的塔式起重机，可能会产生符合塔式起重机指定用途的其他值。

This document provides the classification of tower cranes for construction work as defined in ISO 4306？3, and gives specific requirements for steel supporting structure, mechanisms, ropes and further components basing on standard service conditions, mainly expressed by the following: —    the number of working cycles; —    the load spectrum factor; —    the average displacements; and —    additional values for factors to be used at the structural or mechanical calculation. Tower cranes for construction work are exclusively equipped with a hook as load-handling device. For tower cranes intended to be used for other purposes and/or equipped with other load handling devices, other values according to the specified usage of the tower crane may result.