What is the minimum running clearance that must be maintained between the face of the door pick up rollers and the car sill?

The minimum running clearance that must be maintained between the face of the door pick-up rollers and the car sill is 1/4 inch. This clearance is critical for ensuring that the doors can operate smoothly without obstruction. Adequate clearance minimizes the risk of door binding, which could prevent the doors from opening or closing properly. Additionally, maintaining this specific clearance helps to reduce wear on the door components, extending their lifespan and ensuring reliable elevator operation. This standard is part of safety and operational guidelines in elevator maintenance to enhance performance and safety for users.