Forklifts are mobile machinery that utilize 2 forks or prongs in order to place loads into positions that would normally be hard to reach. Normally, lift trucks fall into 2 major categories: rough-terrain and industrial.
Industrial lift trucks are most commonly used around train and truck loading docks in addition to many warehouse applications. These machines have smaller tires that are designed to run on smooth surfaces. Typically, industrial lift trucks are powered by an internal gasoline engine running on diesel fuel or propane.
There are several smaller industrial forklift models that use an electric motor running off an internal battery. As the name implies, rough terrain lift trucks are engineered to run on unpaved and rough surfaces. Usually, they are the great choice for construction and military operation. Rough terrain forklifts normally have large pneumatic tires that are usually powered by internal industrial engines which run on propane, diesel or propane fuel. These lift truck models could have a telescoping boom, capable of carrying loads up and out from the base of the equipment or they can utilize a vertical tower, which is responsible for lifting loads straight up.
The rough terrain lift truck emerged during 1946, after a 2 pronged lift attachment was attached to a tractor chassis or a power buggy. This initial equipment was used around construction sites and could raise to a height of 30 inches or 76 cm and had a lifting capacity can carry 454 kg or 1000 pounds. Vertical tower forklifts were rapidly developed for industrial application and rough terrain lift trucks became popular too. By the time the 1950s came around, there were models available which could lift up to heights of 9 meters or 30 feet and had lift capacities of 1135 kg or 2500 pounds.
The first 4-wheel drive rough terrain forklift was introduced in 1958. It offered a capacity of 2724 kg or 6000 lbs. and had a lift height of 7 meters or 22.5 feet or 1362 kg or 3000 lbs. and 11 meters or 35 feet. The very first telescoping boom rough terrain forklift emerged on the market during 1962. This specific model allowed loads to be placed out from the base of the equipment both above and below grade.