The ramp consists of metal pallets, similar to the step treads of escalators but longer, or rubber belt. When the conveyors are horizontal, baby carriages, pushcarts and wheelchairs, luggage and food trolleys can be carried without risk, but on inclined conveyors these vehicles, if rather heavy, should be used only if they lock into place automatically. Passenger conveyors are used to transport a great number of people in airports from the main station to the gates and back and in department stores and supermarkets. Moving Walkways (Passenger Conveyors) A passenger conveyor, or power-driven continuous moving walkway, may be used for the conveyance of passengers between two points at the same or at different levels. Before an escalator is put into service, it should be examined by a person or organization approved by the public authorities subsequently periodic inspections at given intervals are needed. A technical dossier should be available listing the main calculation data of the supporting structure, steps, step driving components, general data, layout drawings, schematic wiring diagrams and instructions. Maintenance and inspection Maintenance and inspection along the lines described above for lifts are usually required by authorities.
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