What is one requirement for swing doors used as emergency accesses on blind hoistways?

The requirement for swing doors used as emergency accesses on blind hoistways to be self-closing and self-locking is crucial for safety and security. Self-closing mechanisms ensure that the doors automatically return to a closed position after being opened, which is essential to maintain a safe environment, preventing unauthorized access or accidental falls into the hoistway. The self-locking feature adds an additional layer of security, ensuring that the doors remain secured and cannot be easily opened without the proper mechanism or key, which is particularly important in an emergency situation to control access to the elevator shaft area.

This requirement helps ensure that even in the event of an emergency where personnel may need to access the hoistway quickly, the doors will function properly to help protect both the individuals and the elevator system itself.