Under what circumstances do elevators need access doors?

The elevator needs to be provided with an access door under the following circumstances:

1. When the running height of the elevator car exceeds 30 meters, it is necessary to install an access door on each floor. This is because the size of the elevator room in high-rise buildings is large, and once an accident occurs, the consequences will be serious. Therefore, in this case, it is very necessary to set up an access door.

2. When the vertical height in the elevator shaft exceeds 4 floors, it is necessary to set an access door on each floor or every two floors. This is because when the vertical height in the elevator shaft exceeds 4 floors, the elevator car can't be seen directly in the elevator shaft. Once there is an abnormality, it is difficult for maintenance personnel to carry out safety rescue without an access door, which also increases the maintenance risk.