Structural Members :
- Signs and Labels
- Connection Points
- Sheaves and Drums
- Shafts, Axles, Wheels, Couplings
- Brakes (holding and control)
- Indicators, Gauges
- Self-Contained Electric, Hydraulic, or Gasoline Powered Generating Units
- Transmissions
- Electrical Components
- Covers and Guards
- Bumpers and End Stops
- Trolley and Runway Rail
- Runway Structure
- Conductor System
- Below-the-Hook Devices