What are the categories of gantry cranes according to their use forms

1. Ordinary gantry crane

This type of crane mostly adopts box-type and truss-type structures, and has the most extensive uses. It can transport all kinds of articles and bulk materials, with a lifting capacity of less than 100 tons, and a span of 4 to 39 meters. Ordinary gantry cranes with grab buckets work at a higher level. Ordinary gantry cranes mainly refer to hook, grab, electromagnetic, hoist gantry cranes, and also include semi-gantry cranes.

2. Gantry crane of hydropower station

It is mainly used for lifting and opening and closing gates, and can also be used for installation operations. The lifting capacity is 80-500 tons, the span is small, 8-16 meters; the lifting speed is low, 1-5 meters/min. Although this kind of crane is not often lifted, it is very heavy once used, so the work level should be appropriately improved.

3. Shipbuilding gantry crane

Used for berth to assemble the hull, there are always two crane trolleys: one has two main hooks and runs on the track of the upper flange of the bridge; the other has a main hook and a secondary hook, which are on the lower flange of the bridge. It runs on the track for turning and hoisting large hull sections. The lifting weight is generally 100 to 1500 tons; the span is up to 185 meters; the lifting speed is 　2 to 15 m/min, and the fretting speed is 0.1 to 0.5 m/min.

4. Container Gantry Crane

Used in container terminals. After the trailer transports the containers unloaded from the quayside container carrying bridge from the ship to the yard or rear, they are stacked by the container gantry crane or directly loaded and transported away, which can speed up the turnover of the container carrying bridge or other cranes. A yard that can stack containers with 3 to 4 layers high and 6 rows wide is generally a tire type, but also a rail type. Compared with the container straddle carrier, the container gantry crane has a larger span and height on both sides of the mast. In order to meet the transportation needs of the port terminal, the working level of this crane is relatively high. The lifting speed is 8～10m/min; the span is determined according to the number of container rows that need to be crossed, the maximum is about 60 meters, which corresponds to the lifting weight of 20-foot, 30-foot, and 40-foot containers, respectively And 30 tons.

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