Unimog Skirt Box Step-Drawer Assembly

Please prepare a preliminary design for side storage boxes (skirt boxes) for the Unimog search-and-rescue vehicle. The concept is for side drawers that can be opened outward and, in the open position, function as a fixed access step. This will allow a crew member to safely reach items stored on the upper shelves inside the vehicle body. Key functional requirements: The side box/drawer should provide additional external storage while maintaining a clean, protected side profile in the closed position. When opened, the drawer or its integrated platform must form a stable step for one person. The step must be positively locked in both the closed (road) position and the open (working) position; it should not rely on friction, gravity, or an unsecured hinge. In the open position, it must safely support the weight of a person, including a reasonable dynamic/safety allowance. The step surface should be anti-slip and suitable for outdoor rescue operations, including wet or muddy conditions. The design should consider clearance for the Unimog’s suspension travel, wheel movement, ground clearance, and off-road use. Please propose a suitable material concept, hinge/support arrangement, locking mechanism, drainage provision, and mounting interface to the vehicle body/chassis. Include preliminary dimensions, load assumptions, and any relevant safety or accessibility considerations. The goal is a robust, serviceable solution that improves access to upper-shelf equipment without compromising the vehicle’s off-road capability or side protection. Please share a preliminary concept sketch/layout with your proposed operating principle and load case assumptions.

Parameters

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.