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，主要表示为:-工作循环次数；-荷载谱系数；-平均位移；和-用于结构或机械计算的系数的附加值。用于建筑工程的塔式起重机专门配备吊钩作为负载- 搬运设备。购买本文件时可获得的所有当前修订均包含在购买本文件中。

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.All current amendments available at time of purchase are included with the purchase of this document.