规定了用于评估窄轨拖拉机驾驶员座椅后防滚翻保护结构的试验程序和最低性能标准。它适用于驾驶员控制的拖拉机，但不包括土方机械。它包括动态和静态测试程序。其中包括对防滚翻保护结构的理论分析，该结构将至少提供与物理测试同等的性能。

Specifies test procedures and minimum performance criteria for evaluating roll-over protective structures mounted behind the driver's seat on narrow-track tractors. It applies to driver-controlled tractors, but does not cover earthmoving machinery. It includes procedures for both dynamic and static testing. A theoretical analysis of roll-over protective structures, which would provide at least equivalent performance to physical testing, is included.