What is the minimum distance the door gibs need to extend into the sill groove?

The correct answer is a minimum distance of 1/4 inch for the door gibs to extend into the sill groove. This distance is crucial because it ensures that the door operates smoothly while remaining securely aligned within the elevator shaft during both opening and closing. If the gibs extend too little into the groove, it can lead to improper door alignment, cause excessive wear on the door components, and can potentially result in safety hazards by allowing the doors to misalign or bind. By adhering to the minimum 1/4 inch specification, you maintain proper operational function, alignment, and overall safety of the elevator door system.

The guidelines and standards that dictate these specifications are put in place to ensure the longevity and safe operation of the elevator cab doors.