Define freight elevator often called a service elevator or freight elevator, is an elevator designed to carry freight rather than passengers. Compared to passenger elevators, freight elevators operate at slower speeds, can carry heavier loads, and are able to withstand harsher working conditions. Usually the load capacity of freight elevators is 2000/2500/3000/3500/4000/5000/7000 kg. The speed is 0.25/0.5m/s. Freight elevators have become an important lifting system that facilitates human life. Advantages and disadvantages of freight elevators: ·Reduce manpower burden. ·Improve transportation efficiency. Freight elevators have high-speed and efficient transportation capabilities and can quickly transport large amounts of goods from one floor to another. ·Save space. Compared with traditional ramps or stairs, freight elevators only occupy vertical space. ·Wide range of use. Freight elevators can be used not only in commercial…