本文件规定了塔式起重机上安装的防撞装置和系统的要求 用于建筑工程（定义见EN 14439:2006+A2:2009），以避免 使用中的多台起重机，以避免使用中的起重机与固定障碍物发生碰撞的风险，并 避免穿越禁区。 它还规定了工作范围限制装置的要求。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 specifies the requirements of anti-collision devices and systems installed on tower cranes for construction work (as defined in EN 14439:2006+A2:2009) to avoid the risks of collision between several cranes in service, to avoid the risks of collision between a crane in use and fixed obstacles, and to avoid travelling over prohibited zones. It also specifies the requirements for working range limiting devices.All current amendments available at time of purchase are included with the purchase of this document.