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Sky-high success for Seoul

The tower also features a cutting edge building sway system customised with internal sensors to withstand sway effects

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The 555m Lotte World Tower scooped Elevator World's construction project of the year award
The 555m Lotte World Tower scooped Elevator World's construction project of the year award

Otis Elevator has received the construction project of the year award in the annual Elevator World awards for the 555m Lotte World Tower in Seoul. The building features the world’s longest double-deck elevator and several technology firsts.

 

The total installation includes 30 elevators: 11 Skyrise units (including two double-decks) and 19 Gen2 elevators, as well as 19 escalators in what is South Korea’s tallest vertical structure.

 

The "Sky Shuttle" double-deck elevator runs 496m from the second basement to the tower’s 121st floor observation deck. Utilising a single hoist way, the elevator can transport 54 passengers to the top in one minute. Double-deck refers to an elevator with two cabins – one on top of the other – travelling in a single shaft for increased capacity.

 

Otis, a unit of United Technologies Corp, installed the world’s first double-deck elevator in New York City in 1931.

 

The tower’s double-deck elevators not only travel farther than any other elevator in the world, but also faster, at a speed of 10m per second, or 600m per minute. As a result, in January 2017 the building was recognised by Guinness World Records for having the longest travelling and fastest (with the largest load) double-deck elevators in the world.

 

Double-deck passengers also enjoy a unique ride experience powered by Seoul Sky as 60, 55-inch OLED signage screens, created by LG Electronics, cover the entire elevator interior surface, providing images of Seoul’s past and present history and landmarks. Otis provided software technology to synchronise digital content with the elevator controls at precise timing.

 

To install the two double-deck elevators, as well as two single-deck elevators for emergency use, the company lifted and placed four traction machines, each weighing 21.6 tons, into the machine room at the top of the skyscraper. It also used a multi-modular elevator installation approach, a first for South Korea, reducing construction and installation time by a factor of 2.5 times.

 

It’s common for buildings 100 stories or taller to sway in high winds or an earthquake. To counteract that phenomenon, The Lotte World Tower’s double-deck elevators feature a cutting-edge "building sway" system specially customised with internal sensors to withstand sway effects while ensuring maximum safety.

 

"I’m extremely proud of the entire Otis Korea team for its accomplishments at Lotte Tower and honoured to work with Lotte Engineering & Construction in developing innovative technical solutions on the project," said IS Cho, VP & managing director of Otis Elevator Korea. "This award is a testament to the dedication, creativity and teamwork of multiple organisations in providing technologically advanced product solutions."

 

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