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If the service core (which contains the elevator shafts) becomes too big, it can reduce the profitability of the building. Architects must therefore balance the value gained by adding height against the value lost to the expanding service core. [10] Many tall buildings use elevators in a non-standard configuration to reduce their footprint.
Some types of residential elevators do not use a traditional elevator shaft, machine room, and elevator hoistway. This allows an elevator to be installed where a traditional elevator may not fit, and simplifies installation. The ASME board first approved machine-room-less systems in a revision of the ASME A17.1 in 2007.
Double-deck elevators at Midland Square, Nagoya, Japan The Bailong Elevator Symbol seen within the upper cabin of the elevator in Roppongi Hills Mori Tower Double lobby ("lower lobby" and "upper lobby") to enter the elevators in Roppongi Hills Mori Tower. A double-deck elevator or double-deck lift is an elevator where one cab is stacked on top ...
The H1 Tower is an elevator testing tower in Guangzhou, China, owned by Hitachi. At 273.8 m (898 ft) it is the tallest elevator testing tower in the world. Including the 15 m (49 ft) deep basement, the overall height of the tower measures 288.8 m (948 ft). [1] [2] The structure includes 15 elevator test shafts, totaling 2.2 km (1.4 mi) in length.
A simple dumbwaiter is a movable frame in a shaft, dropped by a rope on a pulley, guided by rails; most dumbwaiters have a shaft, cart, and capacity smaller than those of passenger elevators, usually 45 to 450 kg (100 to 992 lbs.) [2] Before electric motors were added in the 1920s, dumbwaiters were controlled manually by ropes on pulleys.
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Some zoning regulations exclude mechanical floors from a building's maximum area calculation, permitting a significant increase in building sizes; this is the case in New York City. [1] Sometimes buildings are designed with a mechanical floor located on the thirteenth floor , to avoid problems in renting the space due to superstitions about the ...
Hong Kong law Chapter 123F, Building (Planning) Regulations, Regulation 23 sect 3 sub-paragraph (a) defined that: Subject to sub-paragraph (b), for the purposes of regulations 19, 20, 21 and 22, the gross floor area of a building shall be the area contained within the external walls of the building measured at each floor level (including any floor below the level of the ground), together with ...