B30。6适用于拉线、刚性吊杆、吊篮、胸架、起重杆、芝加哥吊杆、剪切腿和A型架井架的施工、安装、操作、检查、测试和维护。这些井架由绞车通过钢丝绳缠绕系统提供动力，用于提升、降低和水平移动自由悬挂的非导向负载。井架通常固定安装，可以临时或永久安装。本卷中的规定也适用于具有相同基本特性的此类井架的任何变体，ASME B30中规定的浮动井架除外。8、浮式起重机和浮式井架。

B30.6 applies to the construction, installation, operation, inspection, testing, and maintenance of guy, stiffleg, basket, breast, gin pole, Chicago boom, shearleg, and A-frame derricks. These derricks, powered by winches through systems of wire rope reeving, are used for lifting, lowering, and horizontal movement of freely suspended unguided loads. Derricks are usually stationary mounted and may be temporarily or permanently installed. The provisions included in this volume also apply to any variations of these types of derricks with the same fundamental characteristics, except those specified for floating derricks in ASME B30.8, Floating Cranes and Floating Derricks.