Before the container can be stowed on deck, the twistlocks must be manually inserted into the corner castings from below and armed.
Before the container can be stowed on deck, the twistlocks must be manually inserted into the corner castings from below and armed.
There are basically two different types of twistlocks.
On the one hand, there are the manual ones, which must always be closed and opened by hand, as the following example shows.
They are often used in container stowage on land.
The twistlocks are designed for a load of 50 tons each and weigh approx. 6.3kg.
The picture shows the enormous loads that twistlocks have to withstand in the event of accidents.