ASTM – American Society of Testing and Measurement – has a lot of standards written for this very purpose. They are focused on the design of mechanical equipment and take into account guests seating surfaces, traction, pinch hazards, guarding from moving equipment, reach envelope, etc etc etc. The amount of standards is quite exhaustive. ASTM is made up of professionals who work in those specific industries, often writing and re-writing the standards over decades.
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