A Machine Room (MR) Elevator is a type of traction elevator that requires a separate, dedicated room to house the main operating machinery. This traditional design has been a standard in vertical transportation for decades, especially in mid- to high-rise buildings.

the MR elevator remains the preferred choice for applications demanding the highest speeds, heaviest capacities, and maximum ease of maintenance.

The defining feature is the presence of the machine room, which is typically located directly above the elevator shaft (hoistway), or sometimes adjacent to it.

It contains all the major components needed to operate the elevator, which allows for easier access for maintenance and repair personnel.

The machine room adds a spatial requirement to the top of the building, affecting the overall height and roof design.

The machine room contains the "brains" and "muscle" of the elevator system.

Traction Machine (Motor and Sheave): This motor (often a geared system) drives the sheave (pulley) that moves the elevator cables.

Controller Cabinet: This houses the control system that manages the elevator's speed, direction, leveling, and response to passenger calls.

Speed Governor: A safety mechanism that monitors the elevator's speed.

Main Disconnect Switches: For controlling power to the entire system.

MR elevators typically use a traction system, which can be.

Geared: Uses a gearbox to reduce the motor speed and increase torque, making it suitable for moderate speeds (up to about 500 feet per minute) and a wide range of buildings.

Gearless: Uses a high-speed motor with a large sheave, capable of very high speeds and lifting heavy loads, typically used in high-rise buildings.