A container crane (also container handling gantry crane, ship-to-shore crane ) is a design of large dockside gantry cranes found at container terminals for loading and unloading intermodal containers from container ships.
Container cranes consistent of a supporting framework that can traverse the length of a quay or yard, and a moving platform called a "spreader". The spreader can be lowered down on top of a container and locks on to the container's four locking points ("cornercastings"), using a "twistlock" mechanism. Cranes normally transport a single container at once, however some newer cranes have the capability to up pick up up to four 20' containers at once.
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