General gantry crane is evolved from the bridge crane is a kind of the equipment, it is usually used to deal with freight yard, the yard outside, bulk cargo handling operation, its structure is metal door model, through the two supporting feet to carry the main structure, its characteristic is high efficiency, large operation range, wide applicability etc.

Universal gantry crane is divided into two types:

1. Full-portal crane: the main beam is not overhung, and the trolley is carried out in the main span;

2. Semi-portal crane: the legs are low and low, which can be determined according to the civil requirements of the site.

According to the main beam form can be divided into:

1. Single girder gantry crane: simple structure, convenient installation, slightly weak overall rigidity and double beam, suitable for large horizontal space.

2. Double main portal crane: strong bearing capacity, large span, strong stability, high cost compared with single beam.

The classification of general gantry cranes is usually listed above, and there are some special types, so we won't introduce them here.