4.3.2
Escalator Arrangements
Moving Stairs can be constructed three ways, two of which are parallel arrangements and one a crisscross arrangement. The crisscross can be operated in two modes – spiral and walkaround, whereas the parallel arrangement defines usage by physical arrangement of stairs.
a) Crisscross Arrangement This layout is simpler to visualize and more common. The stair construction in both options is identical; the difference occurs in the direction of operation of the second level of stairs.
Figure 4.3.4 Side and End elevations as well as plan views of Crisscross escalator arrangements
The possibility of a negative reaction to the separation of escalators, which can be reinforced when: i. ii.
Insufficient floor space is provided for the transit between escalators, causing crowding, pushing and delay. Insufficient elevator service is provided for passengers wishing to travel at least three floors. This forces people to make a multistory escalator trip, which can be wearying, particularly when carrying parcels.
b) Parallel Arrangement This escalator design requires more floor space than the crisscross arrangement. Thus, it used less often. The principal advantage of parallel arrangement is its impressive appearance. The stacked arrangement must be used with caution due to inconvenience to the rider of an
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