00:00Elevator counterweights in skyscrapers can descend at extreme speeds, limited only by aerodynamic drag and terminal velocity.
00:08In the Burj Khalifa, these massive multi-ton blocks plunge down deep vertical shafts at terrifying velocities.
00:16If hoisting cables fail, gravity accelerates the heavy counterweight downward, risking a catastrophic crash into the building's base.
00:25Powerful magnetic brake systems clamp onto the guide rails using eddy current resistance to instantly halt the falling mass.
00:32Powerful magnetic braking systems arrest this catastrophic plunge, as massive steel counterweights in super-tall shafts accelerate toward extreme velocities.
Comments