自1916年以来，ASME一直在定义起重机安全。B30.2适用于手动和电动桥式起重机和龙门起重机的施工、安装、操作、检查和维护，这些起重机具有顶部运行的单梁桥或多梁桥，一个或多个顶部运行的小车起重机用于自由悬挂、，由设备和材料组成的非导向负载。本卷中的要求也适用于具有相同基本特性的起重机，如悬臂龙门起重机、半龙门起重机和壁起重机。本卷不包括用于特殊用途的起重机的要求，例如但不限于非垂直提升服务、提升引导负载或提升人员。 B30.2将与ASME B30系列安全标准的其他卷中描述的设备一起使用。仔细应用这些B30标准将有助于用户遵守其管辖范围内的相关法规，同时实现从这些卷中详述的许多行业最佳实践中获得的操作和安全效益，业主、雇主、用户和其他与B30设备的高架起重机和龙门起重机的规范、购买、维护、培训和安全使用相关的人员，以及所有潜在的管理实体。

ASME has been defining crane safety since 1916.B30.2 applies to the construction, installation, operation, inspection, and maintenance of hand-operated and power-driven overhead and gantry cranes that have a top-running single-girder or multiple-girder bridge, with one or more top-running trolley hoists used for vertical lifting and lowering of freely suspended, unguided loads consisting of equipment and materials. The requirements included in this Volume also apply to cranes having the same fundamental characteristics such as cantilever gantry cranes, semi-gantry cranes, and wall cranes. Requirements for a crane used for a special purpose such as, but not limited to, non-vertical lifting service, lifting a guided load, or lifting personnel are not included in this Volume.B30.2 is to be used in conjunction with equipment described in other volumes of the ASME B30 series of safety standards.Careful application of these B30 standards will help users to comply with pertinent regulations within their jurisdictions, while achieving the operational and safety benefits to be gained from the many industry best-practices detailed in these volumes.Intended for manufacturers, owners, employers, users and others concerned with the specification, buying, maintenance, training and safe use of overhead and gantry cranes with B30 equipment, plus all potential governing entities.