Elevator plunges are rare because brakes and cables provide fail-safe protections

How many elevators do you go everyday? Many people live and work on the ground for 10, 20, or even more stories. But you do not consider much complex electromechanical systems that allow you to slide up and down so that your thinking does not stay inside the tower.

The mechanism that makes the elevator car particularly strong is a steel cable that holds them together. How many cables are in each car? As each cable can withstand the weight of the elevator car for 6 to 8 years of age, even if there is a breakdown, this is correct. This means that you need to disconnect all the cables, so there is a possibility that the car will fall to the ground with just one strange accident. Such an accident actually occurred twice. This first occurred in 1945. It is when the B - 25 bomber crashed into the Empire State Building and shut down all cables. Strangely, the only passenger in the elevator survived! How is that possible? It turned out that all the cables under the car are enough to slow down the car before pushing the bottom.

Two engines dropped from the plane, one passed through the building and landed in a nearby sculpture studio. Another person cut the elevator cable and caused the car to crash into the ground with two young women inside. Unbelievably, despite serious damage, both are escaped by the emergency braking of the elevator and the buffer provided by the air compression caused by the cable being disconnected underneath and the steep fall of the car It was. In tragedy, many other incredible stories of survival and heroism are widespread.

Statistically speaking, the wired elevator is very safe. Their safety record is also out of reach of any other vehicle system. In 1998, it is estimated that an elevator ride of about 8 million (1/12 million) caused abnormality. For the most part it was a small door like the door could not open. Of the 20 to 30 elevator-related fatal accidents per year, most are related to maintenance. For example, technicians are too far from the axis or trapped between moving parts. For example, people blindly enter the door leading to the empty shaft and are tightened by a scarf on the door. However, in 2007 an accident occurred at a child hospital in Seattle, the ThyssenKrupp's ISIS machine room elevator descended freely until a safety brake was used.