SAE J2422_202507

This SAE Recommended Practice describes the test procedures for conducting quasi-static cab roof strength tests for heavy-truck applications. Its purpose is to establish recommended test procedures that will standardize the procedure for heavy trucks. Descriptions of the test setup, test instrumentation, photographic/video coverage, and test fixtures are included. In their 2015 report to Congress titled The Need for Additional Heavy Truck Crashworthiness Standards, the NHTSA stated, “The Agency has contacted SAE International and has asked them to reassess the SAE Recommended Practices in light of our study and recent motorcoach crashworthiness research.” The Truck Crashworthiness Committee reviewed the NHTSA motorcoach research regarding its applicability to heavy-truck cabs. The committee determined that mechanical differences between vehicle construction, combined with differences in rollover crash characteristics, are too great to make the results directly applicable. Since it was issued in 1998, SAE J2422 has been well accepted worldwide, has demonstrated repeatable and reproducible results, and has led to stronger heavy-truck cab designs. Lacking any new, publicly available rollover crash data applicable to heavy trucks, this revision is limited to procedural clarifications where appropriate.