1, co: opposite door

2.2S: Double folding door with side door

3.3S: Three-fold door with side door

4.2C0: Two-fold Door

5.3CO: Three-fold door with middle part.

6, 2U and 3U are not elevator door opening codes.

There are two main forms of elevator door opening, namely, middle door and side door. The middle door can be divided into two parts at most: middle door, middle door and middle door.

The landing door is installed at the landing station at the entrance of the hoistway, and the car door is installed at the entrance of the car.

Floor doors and car doors can be divided into middle doors, side doors, vertical sliding doors and hinged doors according to their structural forms. Opposite doors are mainly used for passenger elevators, while side doors are more commonly used for freight elevators and sickbed elevators.

Extended data:

Elevator type:

1. Passenger elevator, designed for transporting passengers, needs perfect safety facilities and certain interior decoration.

2. Freight elevators are mainly designed for transporting goods, usually accompanied by an elevator.

3. Medical elevators are used to transport sickbeds, stretchers and medical vehicles. This car is long and narrow.

4. Miscellaneous elevators are designed for libraries, office buildings and restaurants to transport books, documents and food.

5. Sightseeing elevator, the car wall is transparent, which is used by passengers for sightseeing.

6. Vehicle elevator, used as an elevator for transporting vehicles.

7. Marine elevators, elevators used in ships.

8. Elevator for construction and elevator for construction and maintenance.

Baidu encyclopedia-elevator