Modern elevators main tractor (winch), rail, heavy equipment, safety devices (such as speed limits, safety gear and buffers), signal control systems, car and hoistway doors and so on. These sections were installed in the shaft of the building and rooms. Wire rope is usually used friction drive, the wire rope around the sheave, respectively connected car and counterweight, motor sheave to the elevator lift. Lifts require secure, reliable, high conveying efficiency, accurate leveling and ride comfort, etc. Basic parameters of rated load in the lift, and take a number, rated speed, shaft and cabin overall dimension type, and so on.