本SAE标准提供了计算转向节臂原木装载机和某些林业设备提升能力的统一方法。它为计算建立定义并指定机器条件。本文件适用于ISO 6814和ISO 17591中定义的转向节臂原木装载机，以及ISO 6814中定义的具有旋转上部结构的某些林业设备，如伐木机堆料机、转运器、收割机，以及驾驶室后面或后部安装的转向节臂原木装载机，这些设备没有自己的电源。它不适用于不能将树木或原木完全抬离地面的收割机。 本文件适用于履带式、橡胶轮胎式、底座式或固定式安装的机器。

This SAE Standard provides a uniform method to calculate the lift capacity of knuckle-boom log loaders and certain forestry equipment. It establishes definitions and specifies machine conditions for calculations. This document applies to knuckle-boom log loaders as defined in ISO 6814 and ISO 17591 and certain forestry equipment defined in ISO 6814 that have a rotating upper-structure such as feller bunchers, forwarders, harvesters, and behind the cab or rear-mounted knuckle-boom log loaders not having their own power supply. It does not apply to harvesters that are incapable of lifting a tree or log completely off the ground. This document applies to those machines that are crawler, rubber-tired, and pedestal or stationary mounted.