Leveling Zone: The limited distance above or below a landing within which the leveling device is permitted to cause movement of the car toward the landing.
Layout Drawing: A drawing applying to a specific installation that shows the arrangement, dimensions and information about the elevator or escalator and their relationship to the building structure. The code requires specific minimum information on the layout drawing.
Machine Room: The room in which the power machinery for operation of the elevator is located.
Operation: The method of actuation the controls divided into major categories summarized as follows:
Parking: A feature incorporated into the signal system of an elevator or elevators by which an elevator receives a signal to always return to a pre-selected landing after all its car or landing signals have been answered and cancelled. It is also called home landing.
Parking device: An electrical or mechanical device, the function of which is to permit the opening of the hoistway door from the landing side when the car is within the landing zone of that landing. The device may also be used to close the door.
Platform: The floor assembly on an elevator on which the passenger stands and/or the load is carried.
Rail: The structural member (usually “T” shaped steel) fastened to the walls of a hoistway to guide the car and counterweight.
Rated load: The load that the elevator is designed to lift at rated speed.
Rated speed: The speed that a traction elevator should operate in the up direction with rated load in the car. This should be the same as the contract speed. For hydraulic elevators the speed in the down direction is usually greater than the rated speed in the up direction and therefore should be separately specified as operating speed in the down direction.
Repair: Replacement or rehabilitation of parts with ones that are basically the same as the original. This will restore to original performance and code requirement. Rope: The wire rope used to support the elevator, counterweight and operate the governor. Various sizes, types and construction are used.
Safety factor (or factor of safety): The ratio between the breaking load on a member and the allowable load on it.
Safety (car or counterweight): The mechanical device at the bottom of the car and counterweight that is activated by the governor to stop the motion of the car and counterweight in the event of an overspeed condition in the down direction.
Existing installation: An installation that has been completed or is under construction prior to the effective date of the code.
Gate: The door on the elevator car is often referred to as a gate. In the early days these were expanding collapsible and therefore called gates. Solid units are normally called car doors but sometimes referred to as gates.
Governor: A device that monitors the speed of the car and counterweight and provides a signal to the control and activates the safety when an overspeed condition occurs.
Final limit: The mechanically operated electric switch located in the hoistway set to operate and turn off power if the car travels beyond either terminal landing.
Hoistway: The opening (shaft) in which the elevator travels.
Interlock: An electro-mechanical device that locks the hoistway door and completes an electric circuit to all operation when in the locked position. This device has two separate functions:
1.) Prevent operation of the driving machine unless the hoistway door is locked.
2.) Prevent the opening of the hoistway door from the landing side unless the car is in the landing zone and is either stopped or being stopped.
Jack: The plunger and cylinder assembly on a hydraulic elevator.
Landing zone: A zone extending from a point 18 inches below a landing to a point 18 inches above the landing.