1. INTERNATIONAL CODE FOR THE
SAFE CARRIAGE OF GRAIN-
THIS PPT PROGRAM COVERS ALL
CONTENTS MENTIONED IN SYLLABUS
– 8.3.2.3
FROM 8.3.2.3.1 to 16
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3. Types of grain
• Wheat
• Maize
• Millet
• Rye
• Wheat
• Oats
• Barley
• Rice
• Pulses
• Seeds and
• whose behavior is similar to that of grain in its natural
state
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4. Dangers involve with bulk grain
Grain has a tendency to settle during the
course of a voyage, as air is forced out when
the individual grains sink. This leads to a gap
developing between the top of the cargo and
the hatch cover. This in turn enables the cargo
to move from side to side as the ship rolls and
pitches. This movement can cause the ship to
list and in worst cases, the ship can capsize.
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5. Grain Code
• The Grain Code will be applied on all the ships
irrespective of their sizes which carry grain,
but,
• If the Administration considers that due to the
sheltered nature and conditions of the voyage,
the application of any of the requirements of
this Code is unreasonable or unnecessary,
exempt from those particular requirements.
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6. Documents required to load grain
• A document of authorization shall be issued
for every ship, either by the Administration or
an organization recognized by it or by a
Contracting Government (to the grain Code)
on behalf of the Administration.
• Grain loading manual
• Vessels can carry grain partially, without a
document authorization under certain
conditions. Refer Grain Code for details.
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7. Grain regulations
Heeling moments (at least) due to grain shift throughout the voyage
shall:
• The angle of heel due to shift of grain shall not be greater than 12° or for
ships of constructed on or after 1st January 1994 the angle at which the
deck edge is immersed, which ever is the lesser.
• In the statical stability diagram, the net or residual area between the
heeling arm curve and the righting arm curve up to the angle of heal of
maximum difference between the ordinates of the two curves, or 40° or
the angle of flooding, which ever is the least, shall in all conditions of
loading be not less than 0.075 m radians.
• The initial metacentric height, after correction for the free surface effects
of liquid in tanks , shall be not less than 0.30m.
After loading, the master shall ensure that the ship is upright before
proceeding to sea.
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9. Where:
• λ₀ = assumed volumetric heeling moment due to transverse shift
stowage factor X displacement
λ₄₀ = 0.8 x λ₀
Stowage factor = volume per unit weight of grain cargo;
Displacement = weight of ship, fuel, fresh water, stores, cargo etc
• The righting arm curve shall be derived from cross-curves which are
sufficient in number to accurately define the curve for the purpose
of these requirements and shall include cross-curves at 12° and 40°
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Grain regulations
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10. Preparing for loading
• Inspect the hold (check the ladders, frames, tank tops for
corrosion, damages, cleanliness etc).
• Check the holds for infestation.
• Check the bilge well, strainer plates, sounding pipes.
• Clean the bilges, test the suction, cover the bilge well with a
strainer. Put a gunny bag on top of the trainer and put cement
around the gunny bag to hold it in place.
• Put the accommodation air condition on re-circulation.
• Check the bilge soundings before & after loading.
• To avoid the extra stresses, it is advisable to load in the lower
holds than tween decks.
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11. • Prepare the loading sequence and de-ballast sequence
plans.
• Make sure no excessive stresses are created during
loading
• Agree the loading sequence plan with the terminal.
• Attend moorings, gangways and ballasting/de-
ballasting, list, trim should be monitored.
• Always keep the vessel upright during loading
• Before the completion of loading rig the lashing if
bundling or wire mesh securing is to be done (for
partially filled compartments)
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Preparing for loading
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12. How to stop grain shift in a filled
compartment
• longitudinal subdivisions
• Saucer of bags as a plug in the hatchway
(should not be used for linseed or similar
cargo)
• Bulk bundle of grain as a plug in the hatchway
• The wings & ends of the compartment are to
be tightly stowed with bagged grain.
• Using feeders
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14. 14
Saucering
• A saucer like surface is made at the hatch way. Height
depends upon the breadth of the vessel.
• Wire lashings laid athwartship direction with means of
securing (bottle screws)
• Dunnage not less than 25 mm in thickness and
between 150 mm and 300 mm in width shall be placed
fore/aft direction over these lashings
• Then a layer of tarpaulin is laid.
• Fill the saucer with bagged grain up to the deck level.
• Cover it with tarpaulin, lay the dunnage and complete
the lashing.
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15. How to reduce grain shift in a partially
filled compartment
• Longitudinal subdivisions
• Over stow with bagged grain
• Cover the surface of grain with a tarpaulin and a timber
platform, then secure with overall lashings (bundling).
• The above system can be replaced with a wire mesh
lashing
• If possible tween decks & lower holds can be loaded as
one compartment.
• If only the lower holds are loaded, then the tween
decks to be closed
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18. • No shifting boards are necessary if the bulk grain does not occupy
more than ½ of the hold.
• The Shifting boards must not be less than 50mm in thickness. They
must be adequately supported by wood minimum size 250mm x
50mm or metal uprights with a maximum spacing of 3.96mm and
set in 80mm housings top and bottom. The jointing of 50mm
shifting boards must overlap by at least 230mm in way of the
uprights.
• If the uprights are made sufficiently strong and the length is not too
great, shoring or staying may be unnecessary. If wood shores are
used they must be in a single piece securely fixed at each end and
heeled against the permanent structure of the ship, but not directly
against the side plating. The angle between the shore and the
horizontal should be kept as small as possible and must never
exceed 45˚.
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Longitudinal subdivisions
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19. Over stow with bagged grain
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Bulk grain
Y
Y - not less than one sixteenth of the maximum breadth
of the free grain surface or 1.2 m, whichever is the greater.
Tarpaulin and
boards
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20. • Grain surface shall be leveled and shall be covered with a
separation cloth or equivalent or by a suitable platform.
Such platform shall consist of;
- bearers spaced not more than 1.2 m apart and
25 mm boards laid thereon spaced not more
than 100 mm apart.
- Platforms may be constructed of other materials
provided they are deemed by the Administration to
be equivalent.
• The bagged grain shall be carried in sound bags which shall
be well filled and securely closed
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Over stow with bagged grain
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21. Cover the surface of grain with a tarpaulin and a
timber platform, then secure with overall
lashings (bundling)
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Boards athwart ships
Canvas
Canvas overlap with
boards by 1.8 m
Bulk grain
Securing athwart
ships
Boards laid
longitudinally
Wire
lashing
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22. • The grain shall be trimmed and leveled to the
extent that it is very slightly crowned and covered
with tarpaulins.
• The tarpaulins shall overlap by at least 1.8 m.
• Two solid floors of rough 25 mm by 150 mm to
300 mm lumber shall be laid with the top floor
running longitudinally and nailed to an
athwartships bottom floor.
• Prior to the completion of loading the lashing
shall be positively attached to the framing (Steel
wire rope of 19mm diameter or equivalent)
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Cover the surface of grain with a tarpaulin and a
timber platform, then secure with overall
lashings (bundling)
Capt. Ranjith Perera - CINEC Maritime
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23. Securing with wire mesh
• The grain shall be trimmed to form a slight
crown along the fore and aft centre line of the
compartment.
• The entire surface of the grain shall be
covered with tarpaulins
• Two layers of wire reinforcement mesh shall
be laid on top of the tarpaulin. The bottom
layer is to be laid athwartships and the top
layer is to be laid longitudinally.
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24. Important
• Refer the grain code for the sizes of dunnages,
uprights, shifting boards and wire ropes. It
varies with the length of such materials.
• Check the anti-shifting mechanisms in partly
filled compartments during the passage.
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