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Prevent closing of elevator doors when passengers approach, stand near or at the door edge, even from a flat angle. 2.5 cm from elevator cabin. 3.0 cm from elevator lobby. 50 cm for door horizontal sensing. 1.8 m for door vertical sensing. Should not fail if any fail-safe related to safety device fails.
Thus, the local elevators can be stacked within the same elevator shaft. [78] Located on the 44th and 78th floors of each tower, the sky lobbies enabled the elevators to be used efficiently, while also increasing the amount of usable space on each floor from 62 to 75 percent by reducing the number of required elevator shafts. [79]
A typical modernization consists of controller equipment, electrical wiring and buttons, position indicators and direction arrows, hoist machines and motors (including door operators), and sometimes door hanger tracks. Rarely are car slings, rails, or other heavy structures changed.
In 2012, the university Board of Governors approved $15 million as part of renewal and modernization project. The total cost was projected to be $100–$130 million. The three phase plan is to replace the control and propulsion systems in the current vehicles, installation of a new automatic train control system, upgrade the power supply ...
After a demonstration at the 1853 New York World's Fair, the elevator industry established credibility. [6] Otis elevator in Glasgow, Scotland, imported from the U.S. in 1856 for Gardner's Warehouse, the oldest cast-iron fronted building in the British Isles [7] Otis founded the Otis Elevator Company in Yonkers, New York, in 1853. When he died ...
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[54] [55] As part of this primarily cyclist-focused initiative, the MTA also agreed to consider providing larger elevator cab sizes and elevator redundancy at stations. [53] In November 2022, the MTA announced that it would award a $965 million contract for the installation of 21 elevators across eight stations, [ 56 ] [ 57 ] and the contract ...
In August 2003, the Neighborhood Association of the Back Bay (NABB) asked the MBTA to move the outbound elevator across the street from the church, and the inbound elevator 150 feet (46 m) away from the library steps. In response, an MBTA preservation consultant prepared a report analyzing the impacts of the proposal.