Applies to contractors engaged in the installation, service and/or repair of freight or passenger elevators and elevator door bucks in private residences and commercial buildings or structures. Generally, the process begins after the elevator shaft has been erected, to include, but not be limited to, the installation of elevator units, doors, door bucks, cables and hoisting systems, motors, and electrical apparatus and wiring in connection with operation of the elevator.

This classification excludes the installation or repair of escalators and industrial machinery which is to be reported separately in classification 0603, and the erection of temporary construction elevators as part of a construction project which is to be reported separately in the classification applicable to the phase of construction being supported.