Most of them are electric sliding door sliding door, with multi-functional characteristics, its door against wind load requirements more stringent, suitable for installation in a variety of plant structures. This kind of doors can be manual, electric conversion. Controlled door leaf number is not too much, usually single tracks. Divided into lower and upper load bearing two kinds. Under load: the door from the bottom of the track load, the top guide. Durability, minimal maintenance, security and control is simple to adapt to a variety of insulation and outer systems. On Load: Door weight bearing on the upper and lower guide. The upper door bearing track requiring high strength, bearing performance, high operational reliability door. Door running friction is small, open light, smooth, doors require a small start-up torque, low power consumption. Sliding door can add a small door (also known as wicket) and Windows. All the advantages of a sliding door, and will become the first choice of the plant gates.