Make mine a double | Archive Titles

Table 1: Solutions to common vertical transport problems*
Problem	Old solution	New solution
Uneven floor heights	Odd floor heights require both decks to stop	Articulating platforms (Otis SDD) provide for a maximum 2 m in floor to floor height variations
Main lobbies odd/even floor selection required for dispatching	Must be selected	Hall Call Allocation (HCA) at elevator lobby entry provides proper deck selection and no odd/even dispatching required
Top floor in zone cannot be served by bottom deck	Requires one floor extra over travel for this to happen	HCA always assigns top floor hall call to top deck
Other deck loading activations, ie one deck is loading/unloading while the other is not	‘Other Deck Loading’ message on alternate car display. In-car CCTV cameras display on alternate cab screens	Almost never occurs as HCA system assigns passengers to contiguous floor stop decks only
Double deck floor dispatching only required during morning	Can only be switched on and off for scenic cars as no other alternate dispatch displays are available	HCA at elevator lobby entry provides seamless dispatching and reverts to single deck operation (normally upper deck dispatching during non-peak times
*Fortune Consultingduring non-peak times

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