What Is an RTG Crane?
An RTG crane (Rubber-Tyred Gantry Crane) is a mobile gantry crane used in intermodal yards and container terminals for stacking and handling intermodal containers. As the name suggests, it moves on rubber tires, offering flexibility and maneuverability that rail-mounted cranes cannot match.
RTG cranes are known for their:
High stacking capacity (typically stacking containers 5–6 high)
Ability to move between container rows
Use of diesel or electric power (modern hybrid versions available)
Key Technical Specifications of RTG Cranes
When selecting an RTG crane, understanding its technical parameters is crucial. Below are the most important specifications:
1. Lifting Capacity
Most RTG cranes have a lifting capacity ranging from 30 to 50 tons, sufficient for handling fully loaded 20ft and 40ft containers, including twin-lift capabilities (lifting two 20ft containers at once).
2. Span and Stacking Height
Span: Typically between 20 to 25 meters, covering multiple container rows (usually 6 rows + truck lane).
Lifting Height: Standard RTG cranes can stack containers 5 high (over 15 meters), while some high-profile models go up to 6 high.
3. Power Source
Traditional RTG cranes run on diesel engines, but modern terminals increasingly adopt:
E-RTG (Electric Rubber-Tyred Gantry) – powered via busbar or cable reel, reducing emissions and fuel costs.
Hybrid RTG – combining diesel with battery or supercapacitor technology for energy efficiency.
4. Travel Speed and Maneuverability
Hoisting Speed: 15–25 m/min (loaded)
Trolley Speed: 40–70 m/min
Gantry Travel Speed: 90–130 m/min
Rubber tires allow 90° steering, enabling easy movement between blocks.
