ThyssenKrupp Multi – world’s first rope-free elevator [video]
The big benefit is that you get more than one elevator per shaft. For skyscrapers the amount of floor space wasted by elevators grows exponentially by the number of floors.<p>Say you have a 5 story building that needs a one shaft elevator. 5 floors tiles 100 sqft per floor is 500 sqft of wasted shaft space. Then say you have a 10 story building that needs two shafts. Now you are wasting 10 floors times two shafts or 2,000 sqft. And so on.<p>An old and terrifing solution to this was to use two shafts and run a continuous loop of open door elevators.<p><a href="https://m.youtube.com/watch?v=Ro3Fc_yG3p0" rel="nofollow">https://m.youtube.com/watch?v=Ro3Fc_yG3p0</a>