The containers on-deck is secured to
each other by means of TWIST LOCKS
and lashing rods. The twist lock is designed for very close tolerance and very
rough use and is consists
of two sets of rectangular projections, one at the top and other at the bottom.
How it work?
Four twist locks are
inserted to the four corner castings (small rectangular holes) of a container
and the next container will be placed on top in such a manner that the corner
castings of the second container fit into the upper rectangular part of the
twist lock. After that , the lock is twisted or turned by 90 degrees. In this
position the width of the rectangular projection is more than the width of the
hole and hence cannot be removed.
give some more information about various type of twist locks like automatic, semi automatic & manual
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