Portal cranes, also known as gantry cranes, are versatile heavy-duty material handling machines used in a wide range of industries such as shipyards, ports, steel mills, and warehouses. These cranes are designed with a tall gantry structure that supports a horizontal beam, which extends outwards to lift and move materials. There are different types of portal cranes, including:
1. Single girder portal crane: This type of crane comprises a single girder that runs the length of the gantry structure, making it a cost-effective solution for light to medium lifting applications.
2. Double girder portal crane: As the name suggests, this type of crane has two girders, which make it more robust and suitable for heavy-duty applications.
3. Semi-portal crane: This is a hybrid between a portal crane and a mobile crane. It runs on rails on one side and is supported by a structure on the other, making it versatile and ideal for moving material to and from fixed positions.
4. Container gantry crane: This type of crane is designed specifically for handling shipping containers at ports and terminals. It has a high lifting capacity and can stack containers up to seven layers high.
5. Rubber-tired gantry crane: This is a mobile version of a container gantry crane, equipped with rubber tires instead of tracks. It can move around the container yard and handle containers efficiently.
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