Evaluation of ROPS and FOPS Tests for Structural Integrity of Forklifts
Abstract
This study examines the Roll-Over Protective Structure (ROPS) and Falling Object Protective Structure (FOPS) tests and their results for forklifts. The main focus of the study is the evaluation of the cabin safety of a forklift with a lifting capacity of 3.5 tons. Within this scope, the compliance of the protective structures with the international standards ISO 3471 and ISO 3449 has been thoroughly analysed.
In the ROPS tests, the applied force and energy values under lateral, rear, and vertical loading conditions were calculated; the test setup, the applied loads, and the resulting deformations in the structure were investigated. Furthermore, in the FOPS test, the required energy levels were evaluated, and the results of the tensile tests conducted to verify the mechanical integrity of the fasteners (bolts) after the impact test were presented.
References
- 1.Demir, M., & Demir, A. (2024). Dizel motorlu ve tam elektrikli forkliftlerin çalışma parametreleri açısından kıyaslanması [Unpublished master’s thesis].
- 2.Buran, O., Tellioğlu, A. C., Demir, M., & Kartal, H. S. (2024). Modeling of forklift drivetrain and test verification of fuel consumption. The European Journal of Research and Development, 4(4), 127–164.
- 3.Eryiğit, O. (2025, February 15). Tumosan forklift. Onur Eryiğit. https://www.onureryigit.com/portfolio-item/tumosan-forklift/Link
- 4.International Organization for Standardization. (2008). Earth-moving machinery — Roll-over protective structures — Laboratory tests and performance requirements (ISO Standard No. 3471).
- 5.International Organization for Standardization. (1992). Earth-moving machinery — Falling-object protective structures - Laboratory tests and performance requirements (ISO Standard No. 3449).
- 6.International Organization for Standardization. (2013). Earth-moving machinery - Laboratory evaluations of protective structures - Specifications for deflection-limiting volume (ISO Standard No. 3164).
- 7.International Organization for Standardization. (2013). Mechanical properties of fasteners made of carbon steel and alloy steel: Bolts, screws and studs with specified property classes and coarse thread and fine pitch thread (ISO Standard No. 898-1).
Kartal, H. S., Buran, O., Demir, M., Tellioğlu, A. C. (2025). Evaluation of ROPS and FOPS Tests for Structural Integrity of Forklifts. *The European Journal of Research and Development*, 5(1), 164-200. https://doi.org/10.56038/ejrnd.v5i1.668
Bibliographic Info