B30。8适用于安装在驳船或浮筒上的起重机和井架。浮式起重机可用于挖掘作业和其他绝对不被视为起重作业的用途。本卷要求仅适用于用于垂直提升和降低自由悬挂非导向负载的浮式起重机和浮式井架。

B30.8 applies to cranes and derricks mounted on barges or pontoons. Floating cranes are convertible for excavation service and other uses that are categorically not considered to be lifting service. The requirements of this volume are applicable only to floating cranes and floating derricks used for vertical lifting and lowering of freely suspended unguided loads.