There are many ways to secure containers on the ground/deck, or to stably stack containers together. Each method requires different types of twist lock. Here are some common ways for your reference:
1. Vertical Locks (Stacked on top of each other)
a. Shipping Container Twist Lock & Base
It is used to stack containers vertically. Dovetail twist locks are suitable for flat surfaces and can be welded to the base or bolted to a metal surface. To use this lock, simply place the lock in place, load the container on top, move the handle from left to right, and it's secured.
b. Shipping Container Manual Twist Lock
It is used to hold two containers stacked vertically. In this lock there is a left-to-right lock, to fix two containers, just move the handle to the neutral position, load the container on the upper part, and then move the handle to the locked position.
c. Shipping Container Semi-automatic twist lock
It is used to hold two containers stacked vertically. It's similar to a manual twist lock, except that instead of a handle, the lock is spring-loaded. The advantage is that the spring stops when the lock is accidentally unlocked. When using it, simply pull the spring into the neutral position and insert the upper container.
d. Shipping Container Manual Twist Lock Weld Type for Chassis
It is generally welded to the container chassis trailer. When unlocked, the lock head is stuck inside. After loading the container, twist the handle to lock
2. Horizontal Locks
a. Horizontal Container Twist Lock/Connector
It is used to connect containers side by side. They cannot be connected vertically, only on the sides. Insert the latch into the side of the container and twist the latch. Attach the second container to it and lock it.
b. Bridge Fittings Clamp
When shipping containers, especially on barges, it is easier to prevent them from tipping or falling if they are tied together. Fortunately, steel bridge fittings can do the job. These heavy-duty fittings hold containers together, combine their weight and make them harder to move, spill or dump in transit.
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