Rail mounted container gantry crane is a kind of rail mounted crane used to offload, stack and load 20ft, 40ft, 45ft ISO standard containers. Its provision of power is offered by cable reel. 

The crane contains three mechanisms: hoisting, trolley travelling and gantry travelling. The trolley running along the track mounted on gantry beam is capable to serve among legs. The crane is able to make straight movement along rails.

This rail mounted container gantry crane can be 3 kinds based on operating type in storage yards: whose girders outreach at the direction of the single outrigger is called single cantilever crane and at the direction of the double outrigger is called double cantilever crane, and whose girders do not outreach is called non-cantilever crane. Users can choose different types depending on the different demands of yards, storage and transport ways of containers and vehicles (trucks or railway vehicles).

Rail Mounted Container Gantry Cranes (RMG cranes) are pivotal pieces of machinery in the realm of modern logistics. These cranes are primarily deployed in two key settings: railway transship fields and large container storage yards.

In large container storage yards, the functions of the RMG crane expand further. Here, it is not only responsible for loading and unloading containers but also for moving and stacking them. The crane can move containers from one area of the yard to another, optimizing the use of space. For instance, it can relocate containers from the receiving area to the long - term storage area. When it comes to stacking, the RMG crane is designed to stack containers in an orderly and stable manner. It can stack multiple containers on top of each other, maximizing the storage capacity of the yard. This ability to efficiently load, unload, move, and stack containers in both railway transship fields and large container storage yards makes the RMG crane an essential asset for the smooth operation of container - based logistics.

In railway transship fields, the RMG crane plays a crucial role in the transfer of containers between trains and other modes of transportation. When trains arrive at the transshipment point, loaded with containers bound for different destinations, the RMG crane swings into action. It is equipped with powerful lifting mechanisms that can precisely pick up containers from the train cars. Once lifted, it can then unload these containers onto the ground, where they may be sorted, stored temporarily, or transferred to trucks for onward delivery. Conversely, during the loading process, the RMG crane is used to load containers onto the trains. It carefully positions the containers into the train cars, ensuring a secure fit for transportation along the railway network.