Ponte rolante tipo pórtico 1. Ponte rolante tipo pórtico completo: a viga principal não possui balanço e o carro se move dentro do vão principal. 2. Ponte rolante tipo semipórtico: os estabilizadores possuem diferenças de altura, que podem ser determinadas de acordo com as exigências de engenharia civil do local.

Railway gantry crane is a lifting equipment specially designed for use in the railway field. It is a very important railway mechanical equipment. Its main function is to carry out handling, loading, unloading and maintenance work on railway lines. The installation of rails, switches, sleepers, and other heavy components and equipment required for railway construction requires the assistance of a railway gantry crane.

Simple gantry crane is also called: light gantry crane, light gantry crane, small gantry crane, small gantry crane. It has a lifting capacity of up to 2,000 kg and is a movable light gantry crane. It can be easily used wherever it is impossible or uneconomical to use a suspended crane. Light gantry cranes can be simply disassembled into several easily transported parts and quickly assembled at another place of use, a feature that is beneficial in many situations. The lifting capacity of I-beam trackless gantry crane can reach 2000 kg.

(1) According to the main girder classification, general gantry cranes can be divided into single main girder gantry cranes and double main girder gantry cranes. (2) According to cantilever classification, general-purpose gantry cranes can be divided into single-cantilever gantry cranes, double-cantilever gantry cranes and non-cantilever gantry cranes.

Shipbuilding gantry cranes are common hull lifting and assembly equipment in shipbuilding ports and terminals. With the rapid development of transport ships and their increasingly large size, shipbuilding gantry cranes are developing in the direction of large size, high speed and heavy load.

The gantry crane is a bridge-type crane in which the horizontal bridge is set on two legs to form a gantry shape. This kind of crane runs on ground tracks and is mainly used for handling and installation operations in open storage yards, shipyards, power stations, ports, railway cargo stations, etc.