KONE UltraRope
This super-light, super-strong elevator cable cuts the shackles limiting architects' sky-high visions. Courtesy Kone
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Of all the physical constraints that dictate our cityscapes, perhaps the most counterintuitive is the elevator cable. Very long standard cables become too heavy to haul, a limitation that restricts the height of buildings. But UltraRope, a new cable with a carbon-fiber core and high-friction coating, could double elevator heights to 3,280 feet.

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