Dock levellers. Safety requirements|Instructions for use, Stability, Electrical equipment, Occupational safety, Type testing, Hydraulic equipment, Platforms, Dimensions, Width, Materials handling equipment, Factor of safety, Bridge decks, Marking, Loading, Control systems, Mathematical calculations, Mechanical testing, Manually-operated devices, Equipment safety, Hazards, Loading and unloading devices, Installation, Safety measures, Safety devices, Materials handling, Loading areas, Maintenance, Verification, Structural design, Electrical safety, Inspection