本推荐规程仅适用于SAE J1040c（ROPS）所涵盖的机器。评估针对局部渗透的阻力。制造商规范内代表性试样的性能要求基于实验室评估程序下经经验验证的结构的性能。随着对FOPS性能的更多了解变得可用，应审查和修订本推荐规程的所有部分。本SAE推荐实施规程建立了一个一致可重复的实验室评估程序和性能要求，用于评估旨在为操作员提供合理保护的结构，使其免受树木和岩石等坠落物的影响。

This Recommended Practice applies only to machines covered by SAE J1040c (ROPS). The evaluations are for resistance to localized penetration. The performance requirements, of a representative specimen within the manufacturer's specifications, are based on the performance of experience proven structures under the laboratory evaluation procedure. It is intended that all portions of this Recommended Practice shall be reviewed and revised as additional knowledge of FOPS performance becomes available. This SAE Recommended Practice establishes a consistently repeatable laboratory evaluation procedure and performance requirements in that evaluation for structures intended to provide operators with reasonable protection from such falling objects as trees and rocks.