(2 of 2)
Two elevators could run in one shaft-way. The elevators might be joined as a double-deck car, as in 60 Wall. Or they may be separate machines in one shaft, carefully kept from colliding, as in Westinghouse's East Pittsburgh office building.
Upper elevators stop at only even floors, lower elevators at only odd floors or vice versa.
Because doubling of elevators is yet rare. Engineer Scott observes that "the higher a tenant goes the poorer is his elevator service, usually to the accompaniment of higher rents also. He considers it "interesting to note that, except for buildings on very large plot areas, the economical story height of New York skyscrapers, as indicated by the ten recent ones, is about the same as the height of the Woolworth Building, erected in 1913.†''
*Another notable elevator manufacturer is Gurney Elevator Co., with whose research General Electric cooperates.
Some Manhattan skyscrapers with elevators rising 45 stories or more:
Height in Feet Stories
Empire State 1,248 102
Chrysler 1 ,046 77
Bank of Manhattan 925 71
R. C. A. Rockefeller Center. . . 850 69
60 Wall 950 67
500 Fifth Avenue 700 61
City Bank-Farmers Trust 742 57
Chanin 625 56
Lincoln 733 55
Irving Trust 654 50
R. C. A. (Lexington Avenue) 643 50
450 Seventh Avenue 525 48