The maximum overlap of a closed swing door against the frame should be at least?

The correct answer pertains to the design and functionality of closed swing doors in elevator installations. An overlap of 1/2" against the frame is crucial to ensure proper sealing and alignment when the door is closed. This overlap helps to prevent air and noise leakage, enhances security, and contributes to the overall aesthetic by ensuring that the door sits snugly against the frame.

The 1/2" specification is typically derived from industry standards that take into account various factors including the material of the door, the intended use of the elevator, and safety considerations for users. An adequate overlap also allows for adjustments that may be necessary due to settling of the building or wear over time, ensuring that the door maintains its function and appearance throughout its lifespan.

Understanding the importance of this overlap can aid in achieving optimal operational efficiency and safety in passenger elevator systems.