When should the jambs be aligned to ensure they are not more than a certain distance out of plumb?

Aligning the jambs of an elevator door frame to ensure they are not more than 1/16 inch out of plumb is critical for the proper functioning and safety of the door operations. This specific tolerance ensures that the doors close correctly and creates a reliable seal when they are shut. A tight alignment helps prevent issues such as door binding, which can lead to malfunction, increased wear on door mechanisms, or even potential safety hazards for passengers.

Maintaining this level of precision is vital in elevator construction and maintenance, as even small deviations can have significant impacts on the overall performance of the elevator system. This tolerance helps guarantee that the elevator doors align correctly with the cab and the landing door, facilitating smooth operation and contributing to the overall reliability and safety of the elevator.