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The primary uses are to securely stack containers, for locking them into place on a container ship, [1]: 4:18 semi-trailer or rail carriage, and for lifting and handling by specific container-handling equipment, like straddle carriers, reach stackers, container-handling forklifts, sidelifters, and various types of container cranes. Twist-locks ...
Containers shorter than 40‑foot must therefore be horizontally joined together rigidly (with four twist-locks between every two containers), to form a rigid combined whole of matching length to longer containers or another same-length joined container-combination (both underneath and above them), to be stackable – supported on the four ...
Container ships are not particularly susceptible to dangerous load shifting. Most loads are in containers measuring 1/2, 1 or 2 TEUs, which are locked to each other and to the deck with twist-locks, and occasionally reinforced with steel cables. Containers generally only create an issue with the stability of the vessel when they break free.
The spreader is placed between the container and the lifting machine. [1] The spreader used for containers has a locking mechanism at each corner that attaches to the four corners of the container. A spreader can be used on a container crane, a straddle carrier and with any other machinery to lift containers. Spreader operation can be manual ...
A typical twist-lock is inserted into the casting hole of one container and rotated to hold it in place, then another container is lowered on top of it. [49] The two containers are locked together by twisting the device's handle. [49] A typical twist-lock is constructed of forged steel and ductile iron and has a shear strength of 48 tonnes. [50]
An intermodal container, often called a shipping container, or cargo container, (or simply "container") is a large metal crate designed and built for intermodal freight transport, meaning these containers can be used across different modes of transport – such as from ships to trains to trucks – without unloading and reloading their cargo. [1]