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# Elevators If it is very inconvenient and impractical to have a single bank of elevators serving all the floors, the large number of call buttons in use at any one time would mean lengthy delays as each elevator in turn would rise all the way to the highest floor requested before starting down ag...

# Elevators If it is very inconvenient and impractical to have a single bank of elevators serving all the floors, the large number of call buttons in use at any one time would mean lengthy delays as each elevator in turn would rise all the way to the highest floor requested before starting down again. As an alternative, builders segregate elevators by the floors. The following two building features come into play that work to our advantage: - The sky lobby (an elevator terminal for separate banks of elevators) and blind-shaft elevators - In larger high-rise buildings, it is very inconvenient and impractical to have a single bank of elevators serving all the floors. The large number of call buttons in use at any one time would mean lengthy delays as each elevator in turn rises all the way to the highest floor requested before starting down again. As an alternative, builders segregate elevators by the floors.