As architects continue to design taller and taller buildings, a certain limitation of elevators is going to become more of a problem – using traditional steel lifting cables, they can’t go farther than 500 meters (1,640 ft) in one vertical run. Any higher, and the weight of all the cable required is simply too much. Currently in the world's few buildings that are over 500 meters tall, passengers must transfer from one elevator line to another, part way up. Thanks to a new lightweight material known as UltraRope, however, elevators should now be able to travel up to one kilometer (3,281 ft) continuously.
Read the full article: UltraRope could make kilometer-high elevators possible