What is the minimum number of hoisting ropes required for a traction elevator?

The minimum number of hoisting ropes required for a traction elevator is three. This configuration ensures that the elevator system maintains a balance between safety, functionality, and the capability to handle the load effectively.

Using three hoisting ropes provides redundancy and stability. Should one rope fail or experience wear, the remaining two can still carry the load, thereby ensuring the safety of the elevator and its passengers. Moreover, a three-rope system allows for better distribution of forces on the sheave and optimal operation of the elevator, reducing stress on each individual rope.

In contrast, fewer than three ropes may not provide adequate safety margins or load-bearing capabilities, while more than three can complicate the system without adding significant practical benefit for typical applications. Thus, the three-rope standard addresses safety regulations and operational efficacy.