A17.7 covers the design, construction, operation, inspection, testing, maintenance, alteration, and repair of the following equipment and its associated parts, rooms, spaces, and hoistways, where located in or adjacent to a building or structure: (a) hoisting and lowering mechanisms, equipped with a car, that move between two or more landings. This equipment includes, but is not limited to, elevators (b) power-driven stairways and walkways for carrying persons between landings.  This equipment includes, but is not limited to, escalators and moving walks; and (c) hoisting and lowering mechanisms, equipped with a car, that serves two or more landings and are restricted to the carrying of material by their limited size or limited access to the car.  This equipment includes, but is not limited to, dumbwaiters and material lifts.

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