Theo elevator has a load of 400 kilograms. How many kilograms does the counterweight add?

Ofo elevator has a load of 400 kg and a counterweight of 80 kg. According to relevant data, the counterweight =K* rated load+car mass (k is the balance coefficient, which is between 0.4 and 0.5), and the counterweight of an elevator with a load of 400kg is added with 80kg. Elevator counterweight is usually called counterweight. The elevator car and counterweight are symmetrically suspended on the traction sheave of the main engine. When the car is half loaded, the weight of the car and the counterweight are equal. At this time, the traction machine can only drive the elevator by overcoming friction.