A rope loop attached to the underside of the car and counterweight that equalises rope weight imbalance as the car travels through long rises.
Full Definition
In elevators with travel heights exceeding approximately 30 m, the weight of the hanging suspension ropes becomes significant and creates a varying load imbalance between car and counterweight sides. Compensating ropes (or compensating chains in older installations) loop under both the car and counterweight, providing an opposing weight that cancels the rope-weight differential throughout the full travel range. This keeps traction effort nearly constant regardless of car position. An anti-rebound sheave or tensioning device in the pit prevents the compensating loop from bouncing during car movement.