Section: 11 CARGO OPERATIONS - Univan

Univan Ship Management Limited Issue 1 REV 0 Page
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FLEET OPERATION MANUAL Date 01.01.2005
SECURING OF CONTAINERS
Copyrights: Univan Ship Management Limited, Hong Kong. All rights reserved
Any unauthorized reproduction of this manual, in any form is prohibited
SECTION 11.9
No structural defects which would compromise the proper use of the equipment, for example:
Twistlocks with missing handles.
Twistlocks with fractured housings.
Double cones with fractured base plates.
Seized/buckled turnbuckles, bridge fittings.
Picture No: 3, Damaged Turn Buckles
Picture No: 4 Worn out Shoe Fitting
11.9.3 Incompatible securing devices
With the multiplicity of device manufacturers and the lack of standardisation, many devices are
designed to be used only in conjunction with other devices of the same make. An example of this
is shoe twistlocks which are incompatible with deck sockets. Another example is the joint use of
twistlocks having either right or left handed closing levers. In such circumstances it is very difficult
to tell if the twistlock is closed or open, since in the same lever position one device would appear
to be closed and the other would appear to be open. One can imagine how dangerous such a
practice is.
11.9.4 Incorrect securing device application
Non-purpose-built containerships are frequently involved with many securing device application
problems. On such vessels steel wires are the common lashing medium, and where bulldog grips
are used to either join two ends or form a loop, numerous failures have been found to occur.
Incorrect grip sizes, numbers of grips and improper grip to wire application have all contributed to
these failures. Timber chocking is popular practice on non-purpose-built containerships,
principally because it is cheaper and quicker than welding restraints, e.g., I beams or base