本文件描述了基础设施维护车辆的结构强度要求。 这些要求的主要目的是规定基础设施维护车辆的最低结构完整性水平，以确保在正常和极端运行条件下的安全性能。 本文件适用于新的和改进的机车车辆。 本标准中规定的要求不追溯适用于任何现有车辆，但在合理可行的范围内，在本标准涵盖的区域内进行改装的车辆除外。 该文件涵盖了机车车辆的设计、施工和维护。 不包括机车车辆的操作。

This document describes requirements for the structural strength of infrastructure maintenance rolling stock. The main purpose of the requirements is to prescribe the minimum structural integrity level of the infrastructure maintenance rolling stock to ensure safe performance under normal and extreme operating conditions. This document applies to new and modified rolling stock. The requirements mandated in this standard do not retrospectively apply to any existing vehicles other than vehicles which are being modified in areas covered by this standard so far as reasonably practicable. The document covers the design, construction and maintenance of rolling stock. Operation of rolling stock is not covered.