Building maintenance unit

Workers clean the façade of a hospital from the building maintenance unit

A building maintenance unit (BMU) is an automatic, remote-controlled, or mechanical device, usually suspended from the roof, which moves systematically over some surface of a structure while carrying human window washers or mechanical robots to maintain or clean the covered surfaces. It can also be used on interior surfaces such as large ceilings (e.g. in stadiums or train stations) or atrium walls.

References

"Powered platforms for building maintenance". OSHA . Retrieved 2025-12-14.

A120.1 - Safety Requirements for Powered Platforms and Traveling Ladders and Gantries for Building Maintenance (2021 ed.). ASME. 2022. ISBN   978-0-7918-7524-7.

"Shard worker stuck on 72nd floor". BBC News . 2012-07-02. Retrieved 2025-12-14.

Jeffay, John (2022-10-31). "Sky's The Limit For World's First High-Rise Robot Window Cleaner". NoCamels. Retrieved 2025-12-14.