I think the one I saw was in Mori Tower in Japan. https://www.mori.co.jp/en/projects/roppongihills/technology.html https://www.mori.co.jp/en/projects/roppongih

I think the one I saw was in Mori Tower in Japan. https://www.mori.co.jp/en/projects/roppongihills/technology.html https://www.mori.co.jp/en/projects/roppongihills/technology.... > Super Double-Deck Elevators > We have installed these elevators in Roppongi Hills Mori Tower. Mori Tower’s “super double-deck elevators” are equipped with a pantograph joint on the part of the elevator that connects two passenger cars that can expand and contract by up to two meters, making it possible for the elevator to serve floors with varying heights. > Nippon Otis Elevator Company and Mori Building have a joint patent on this pantograph joint structure, the first of its kind in the world. https://en.wikipedia.org/wiki/Double-deck_elevator https://en.wikipedia.org/wiki/Double-deck_elevator