Machine-Roomless Elevators

This revolutionary elevator system is based on the first major breakthrough in lifting technology in nearly 100 years. Designed for buildings between about two and 30 stories, this system employs a smaller sheave than conventional geared and gearless elevators. The reduced sheave size, together with a redesigned machine, allows the machine to be mounted within the hoistway itself—eliminating the need for a bulky machine room on the roof.Just as unique are the flat polyurethane-coated steel belts, an Otis invention for the Gen2™ elevator system, that replace the heavy, woven steel cables that have been the industry standard since the 1800s. The belts make the smaller sheave possible. They are only 0.1 inch (3 mm) thick, yet they are as strong as woven steel cables and far more durable, flexible and space-saving.