1. A structure on the roof of a building covering a water tank, shaft, or service equipment. 2. A structure, as on a roof, covering a stairwell or other opening, to provide adequate headroom.

What are the 3 types of elevators?

There are three main types of elevators commonly used: traction with a machine room, machine-room-less traction, and hydraulic; however, there are variations on each type.

What does T stand for in elevator?

But it can also stand for Spa. T: Terrace, used in some apartment buildings.