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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.
A double-deck elevator or double-deck lift is an elevator where one cab is stacked on top of another. This allows passengers on two consecutive floors to be able to use the elevator simultaneously, significantly increasing the passenger capacity of an elevator shaft.
An elevator shaft was included in the design because Cooper was confident that a safe passenger elevator would soon be invented. [12] The shaft was cylindrical because Cooper thought it was the most efficient design. [13] Otis later designed a special elevator for the building.
Guide rails are part of the inner workings of most elevator and lift shafts, functioning as the vertical, internal track. The guide rails are fixed to two sides of the shaft; one guides the elevator car and the other for the counterweight.
Johnson Lifts held an 18% and 36% market share in the Indian lift and escalator markets respectively as of January 2017. [9] The company sold over 10,000 lifts and recorded revenue of around ₹ 2,000 crore (equivalent to ₹ 50 billion or US$590 million in 2023) in FY19.
There are six lift shafts of varying heights and speeds, including a high-speed shaft with a travel of 100 metres (328 ft 1 in) and a theoretical maximum speed of 10 m/s (33 ft/s). The tower's renovation was officially completed in July 2010. [ 5 ]
The configuration (size, position and quantity) of this reinforcement should be supplemented to the element reinforcement design to ensure for adequate capacity of the lifting design. Lifting design is influenced by the steel / concrete interaction of the specific anchor selected. Different load cases are considered by the lifting design ...
Lift in a HDB residential block in Woodlands undergoing replacement under the SLRP programme. HDB introduced a new Selective Lift Replacement Programme (SLRP) to help replace about 750 old lifts with modern lifts that come with more energy-efficient motors, vision panels and infra-red doors with motion safety sensors for added energy efficiency ...
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