For center-opening doors, the maximum distance from the door edge to the sill edge on the hoistway side is?

For center-opening doors, the maximum distance from the door edge to the sill edge on the hoistway side is established to ensure safety and smooth operation. This alignment is crucial because it helps prevent entrapment or injury by minimizing the gap that can occur when the doors are closed or when they are in motion. A maximum distance of 1/2 inch is typically specified to achieve this balance of safety and functionality while accommodating necessary clearance for the door's mechanical movements.

This specification is important to adhere to codes and standards that govern elevator installation, ensuring that all components work together reliably. Maintaining this maximum distance helps avoid issues associated with misalignment or improper installation, which can compromise both the operation of the elevator and the safety of its passengers.