Considering Human Variability in the Design of Safe Interaction with Agricultural Machinery: The Case of Foldable Roll-Over Protective Structure (FROPS) Manual Handling

The foldable roll-over protective structure (FROPS) protects the operators against fatal injuries in tractor roll-over accidents. However, a rear-mounted FROPS is often folded down or removed. In the present study, the accessible zones and grasping areas in a rear-mounted FROPS were redesigned and adapted to the 5th, 50th, and 95th European human anthropometric percentiles to enhance its correct and comfortable use. Then, a rod was proposed as a design solution to make the roll-bar grasping areas fall within the new accessible zones. The rod prototype increased roll-bar reachability and facilitated the raising handling, especially for shorter users. The present study results and the accessible zones redesigned, taking into account the human percentiles, will be helpful in rethinking reachability issues in manual handling of machinery components, to support the correct behaviours, and make human–machine interaction more comfortable and safer for all.

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