Breakage
Although overpacking is undesirable, so is under-
packing, since the latter allows a product to be sus-
ceptible to breakage damage.The breakage problem
is present in every step of ocean transport. In addi-
tion to normal domestic handling, ocean cargo is
loaded aboard a vessel by use of a line (with several
items together in a net), conveyor, chute, or other
methods, all of which put added stress and strain on
the package. Once the cargo is on the vessel, other
cargo may be stacked on top of it, or packages may
come into violent contact with each other during
the course of the voyage. To complicate matters,
handling facilities at an overseas port may be unso-
phisticated. The cargo may be dropped, dragged,
pushed, and rolled during unloading, moving in and
out of customs, or in transit to the final destination.
In China, primitive methods (i.e., carts, sampans,
junks, and so on) are used to move a great deal of
cargo. Therefore, packing must be prepared to
accommodate rough manual handling.
To guard against breakage, it may be desirable to
use such package-testing equipment as vibration,
drop, compression, incline-impact, and revolving
drum.The cargo must not exceed the rated capac-
ity of the box or crate.Attempts should be made to
ensure that internal blocking and bracing will dis-
tribute the cargo’s weight evenly. Cushioning may
be needed to absorb the impact. Cautionary mark-
ings, in words and symbols, are necessary to reduce
mishandling due to misunderstanding.
One universal packing rule is “Pack for the tough-
est leg of the journey.” To accommodate this rule,
cargo should be unitized or palletized whenever pos-
sible. Palletizing is the assembly of one or more
packages on a pallet base and the securing of the load
to the pallet. Unitizing is the assembly of one or
more items into a compact load,secured together and
provided with skids and cleats for ease of handling.
These two packing methods force cargo handlers to
use mechanical handling equipment to move cargo.
Moisture and temperature
Certain products can easily be damaged by mois-
ture and temperature. Such products are subject to
condensation even in the hold of a ship equipped
with air-conditioning or dehumidifying equipment.
Another problem is that the cargo may be unloaded
in the rain. Many foreign ports do not have covered
storage facilities, and the cargo may have to be left
in the open subject to heat, rain, cold, and other
adverse elements. In Morocco, bulk cargo and large
items are stored in the open. Mozambique does the
same with hazardous, bulk, and heavy items. Cargo
thus needs extra strong packing, containerization,
or unitization in order to afford some measure of
protection under these conditions.
One very effective means of eliminating mois-
ture is shrink wrapping, which involves sealing
merchandise in a plastic film. Water proofing can
also be provided by using waterproof inner lines or
moisture-absorbing agents and by coating finished
metal parts with a preservative or rust inhibitor.
Desiccants (moisture-absorbing materials), mois-
ture-barrier or vapor-barrier paper, or plastic
wraps, sheets, and shrouds will also protect cargo
from water leakage or condensate damage. Cargo
can be kept away from water on the ground if placed
on skids, pallets, or dunnage while having drain
holes in crates.
There are several steps to ensure the proper way
of packing to minimize moisture and breakage prob-
lems.
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These steps are as follows:
1 Place water-barrier material on interior of
sides and roof.
2 Use vertical sheathing.
3 Block, brace, and tie down heavy items.
4 Use new, clear, dry lumber and provide ade-
quate diagonals.
5 Use multiple similar items.
6 Use waterproof tape to seal fiberboard boxes.
7 Palletize shipping bags.
8 Use proper gauge, type, and number of straps.
Pilferage and theft
Cargo should be adequately protected against theft.
Studies have fixed such losses in all transportation
modes in a range from $1 billion to in excess of $5
billion.
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In the USA alone,the annual value of cargo
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