A rubber tyred gantry crane (US: rubber tired gantry crane)/ RTG (crane), or sometimes transtainer, is a wheeled mobile

gantry crane A gantry crane is a Crane (machine), crane built atop a wikt:gantry, gantry, which is a structure used to straddle an object or workspace. They can range from enormous "full" gantry cranes, capable of lifting some of the heaviest loads in the wor ...

operated to ground or stack

intermodal container An intermodal container, often called a shipping container, or a freight container, (or simply "container") is a large metal crate designed and built for intermodal freight transport, meaning these containers can be used across different Mode ...

s. Inbound containers are stored for future pickup by drayage trucks, and outbound are stored for future loading onto vessels. RTGs typically straddle multiple lanes, with one lane reserved for container transfers. Advantages:its mobility gives a rubber tyred gantry crane wide appliance Being mobile, RTGs are often powered by

diesel generator A diesel generator (DG) (also known as a diesel genset) is the combination of a diesel engine with an electric generator (often an alternator) to generate electrical energy. This is a specific case of an engine generator. A diesel compress ...

systems (gensets) of . Due to the lack of an electrical grid to dump energy when containers are being lowered they often have large

resistor A resistor is a passive two-terminal electronic component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active e ...

packs to rapidly dissipate the energy of a lowering or decelerating container.Fuel Saving Flywheel Technology for Rubber Tired Gantry Cranes in World Ports
/ref> Diesel-powered RTGs are notorious polluters at ports, as each burns up to of

diesel fuel Diesel fuel, also called diesel oil, heavy oil (historically) or simply diesel, is any liquid fuel specifically designed for use in a diesel engine, a type of internal combustion engine in which fuel ignition takes place without a spark as a re ...

. There are also electric rubber tired gantry cranes. The first electrified rubber-tyred gantry cranes (ERTG) in China was unveiled by the She Kou container terminal (SCT) in

Shenzhen Shenzhen is a prefecture-level city in the province of Guangdong, China. A Special economic zones of China, special economic zone, it is located on the east bank of the Pearl River (China), Pearl River estuary on the central coast of Guangdong ...

in Aug 2008. Rubber-tired gantry cranes are also being electrified at the

Port of Long Beach The Port of Long Beach, administered as the Harbor Department of the City of Long Beach, is a container port in the United States, which adjoins Port of Los Angeles. Acting as a major gateway for US–Asian trade, the port occupies of land wi ...

to improve air quality, with funding from the California Energy Commission. Aside from the intermodal industry, RTGs also are extensively used in industry. Applications include erecting large unbalanced structures, assembling large manufacturing components, positioning pipelines, and bridge construction. Some RTGs use automation technology at ports to reduce human involvement in processing and handling cargo. Automation technology is used to optimize, track, or communicate container movements (e.g., automated gate systems), as well as automated cargo handling equipment to load, unload, and move containers.

References

{{DEFAULTSORT:Rubber Tyred Gantry Crane Cranes (machines) Intermodal containers Port infrastructure

See also

References