According to the form of use
1. Ordinary Gantry Crane
Track gantry crane
This type of crane mostly adopts box type and truss structure, and is the most widely used. It can handle various individual items and bulk materials, with a lifting capacity of less than 100 tons and a span ranging from 4 to 39 meters. The working level of ordinary gantry cranes with grabs is relatively high. Ordinary gantry cranes mainly refer to hook, grab, electromagnetic and hoist gantry cranes, and also include semi-gantry cranes.
Ii. Gantry Cranes for Hydropower Stations
It is mainly used for hoisting and opening and closing gates, and can also be used for installation operations. The lifting capacity ranges from 80 to 500 tons, and the span is relatively small, ranging from 8 to 16 meters. The lifting speed is relatively low, ranging from 1 to 5 meters per minute. Although this type of crane is not frequently used for lifting operations, once it is put into use, the workload becomes extremely heavy. Therefore, the working level should be appropriately raised.
Iii. Shipbuilding Gantry Cranes
It is used for assembling the hull on the slipway and is usually equipped with two hoisting trolleys: one has two main hooks and runs on the track of the flange on the bridge frame; Another one has a main hook and a secondary hook, running on the track at the lower flange of the bridge frame to flip and hoist large sections of the hull. The lifting capacity is generally 100 to 1,500 tons. The span reaches 185 meters. The lifting speed is 2 to 15 meters per minute, and there is also a fine motion speed of 0.1 to 0.5 meters per minute.