SAE J820_201706主要适用于通过卷筒和提升绳机构提升负载的移动式起重机。如果负载可以保持恒定，且提升绳移动距离足以达到规定的线速度测量精度，则可以使用该参数确定提升绳速度和其他提升绳机构的功率。本推荐规程适用于所有机械、液压和电动起重机构。

SAE J820_201706 applies primarily to mobile cranes that lift loads by means of a drum and hoist line mechanism. It can be used to determine the hoist line speed and power of other hoist line mechanisms, if the load can be held constant and hoist line travel distance is sufficient for the accuracy of the line speed measurements prescribed. This recommended practice applies to all mechanical, hydraulic, and electric powered hoist mechanisms.