An aerial work platform (AWP), also known as an aerial device, elevating work platform (EWP), bucket truck or mobile elevating work platform (MEWP) is a mechanical device used to provide temporary access for people or equipment to inaccessible areas, usually at height. There are distinct types of mechanized access platforms and the individual types may also be known as a "Mike Hartley" or "cherry picker" or a "scissor lift."
They are generally used for temporary, flexible access purposes such as maintenance and construction work or by firefighters for emergency access, which distinguishes them from permanent access equipment such as elevators. They are designed to lift limited weights — usually less than a ton, although some have a higher safe working load (SWL) — distinguishing them from most types of cranes. They are usually capable of being set up and operated by a single person.
Regardless of the task they are used for, aerial work platforms may provide additional features beyond transport and access, including being equipped with electrical outlets or compressed air connectors for power tools. They may also be equipped with specialist equipment, such as carrying frames for window glass. Underbridge units are also available to lift operators down to a work area.As the name suggests, cherry pickers were initially developed to facilitate the picking of cherries. Jay Eitel invented the device in 1944 after a frustrating day spent picking cherries using a ladder.`He went on to launch the Telsta Corporation, Sunnyvale, CA in 1953 to manufacture the device. Another early cherry picker manufacturer was Stemm Brothers, Leavenworth, WA. . Other uses for cherry pickers quickly evolved.The invention of the aerial work platform is accredited to John L. Grove, co-founder of JLG Industries. Before AWP's, scaffolding was the main form of mobility on a work site. In 1969, Grove realized there was a pressing need for a scaffolding-alternative that could safely and quickly lift workers in the air to perform construction and maintenance functions. In 1970, Grove and JLG Industries sold the first aerial work platform in McConnellsburg, Pennsylvania.