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IN exercise of the powers
conferred on the Commissioner
responsible for shipping by
section 181 of the Merchant
Shipping Act, 1963 (Act 183),
these Rules are made this 6th day
of June, 1974.
Rule 1—Application of Rules.
Unless expressly provided
otherwise, these Rules shall apply
to—
(a) all Ghanaian ships employed in
the carriage of bulk grain;
(b) other ships—
(i)
when they are loaded with grain in
bulk at any port or place in Ghana
or within the territorial waters
thereof; or
(ii) when they enter any port or
place in Ghana or come within the
territorial waters thereof laden
with grain in bulk.
Rule 2—Stowage of Full
Compartments.
(1) Except as hereinafter
provided, any compartment which is
entirely filled with bulk grain
shall be divided either—
(a) by a longitudinal bulkhead or
shifting boards, in line with, or
not more than 5 per cent of the
moulded breadth of the ship from,
the centre line; or
(b) by longitudinal bulkheads or
shifting boards off the centre
line of the ship provided that the
distance between them does not
exceed 60 per cent of the moulded
breadth of the ship and trimming
hatches of suitable size, suitably
placed are provided in the wings
at longitudinal intervals of not
more than 25 feet with end
trimming hatches placed not more
than 12 feet from transverse
bulkheads.
(2) In every case, the
longitudinal bulkheads or shifting
boards shall be properly
constructed and fitted grain tight
with proper fittings between the
beams and shall extend to the top
of the feeders of the hold or
compartment in which they are
situated.
(3) In the holds, the longitudinal
bulkheads or shifting boards shall
extend downwards from the
underside of the deck to a
distance of at least one-third the
depth of the hold or 8 feet,
whichever is greater. In other
compartments such as in 'tween
decks, such longitudinal bulkheads
or shifting boards shall extend
from deck to deck.
(4) The provisions of sub-rules
(1), (2) and (3) of this rule
shall not apply to—
(a) a compartment other than a
hold if bagged grain or other
suitable cargo therein is tightly
stowed in the wings to a
width, at any point, of not less
than 20 per cent of the
corresponding breadth of the ship;
(b) parts of compartments where
the maximum breadth of the deck
head within such parts does not
exceed one-half of the moulded
breadth of the ship;
(c) except in the case of
compartments loaded with bulk
linseed, those parts of a
compartment which, in ships which
maintain throughout the voyage a
metacentric height of not less
than 12 inches in the case of
single deck or two deck ships and
not less than 14 inches in the
case of other ships, are:
(i)
below and within 7 feet of a
feeder, but only below or abreast
of a hatchway, if that feeder
contains, or all the feeders
collectively feeding a compartment
contain, not less than 5 per cent
of the quantity of grain carried
in the compartment which is fed;
(ii) below or abreast of a
hatchway where the bulk grain
beneath the hatchway is trimmed in
the form of a saucer hard up to
the deck head beyond the hatchway
to a depth in the centre of the
saucer of not less than 6 feet
measured below the deck line and
is topped off with bagged grain or
other suitable bagged cargo so as
to fill the hatchway and the
saucer below and is stowed tightly
against the deck head, the
longitudinal bulkheads, the
hatchway beams and the hatchway
side and end coamings.
Rule 3—Feeders.
(1) Any compartment which is
entirely filled with bulk grain
shall be provided with feeders
constructed in accordance with the
requirements of the First Schedule
or with such other requirements as
the Commissioner may prescribe by
notice published in the Gazette.
Such feeders shall be so placed as
to ensure a free flow of grain to
all parts of the compartment
containing bulk grain:
Provided that feeders shall not be
required—
(a) when bulk grain is carried in
deep tanks which are primarily
constructed for the carriage of
liquids and in which the greatest
width does not exceed one-half of
the moulded breadth of the ship,
or which are divided by one or
more permanent steel longitudinal
divisions sited not more than
one-half of the moulded breadth of
the ship apart, subject to the
condition that the tanks and tank
hatchways are completely filled
and the tank lids are securely
closed;
(b) when bulk grain is trimmed in
the form of a saucer hard up to
the deck head beyond the hatchway
to a depth in the centre of the
saucer of not less than 6 feet
measured below the deck line and
is topped with bagged grain or
other suitable bagged cargo so as
to fill the hatchway and the
saucer below and is stowed tightly
against the deck head, the
longitudinal bulkheads, the
hatchway beams and the hatchway
side and end coamings.
(2) Each feeder shall contain not
less than two per cent of the
quantity of grain carried below
deck level in that part of the
compartment which it feeds.
(3) Each feeder shall be fitted
with a longitudinal bulkhead or
shifting boards extending to the
full depth of the feeder:
Provided that such longitudinal
bulkhead or shifting boards need
not be fitted in a single deck or
two-deck ships which maintain,
throughout the voyage, a
metacentric height of 12 inches;
or any other ship which maintains,
throughout the voyage, a
metacentric height of 14 inches if
—
(i)
the feeder contains, or all
feeders collectively feeding a
compartment contain, not less than
five per cent of the quantity of
grain carried below deck level in
that compartment; and
(ii) the sinkage of grain
amounting to two per cent of the
volume of the compartment fed
would not cause the free grain
surface to fall below the lower
extremities of the feeder or
feeders at deck level; and a shift
of the free grain surface to an
angle of 12º to the horizontal
would not cause that surface to
fall below the lower extremities
of the feeder or feeders at deck
level.
(2) For the purposes of this
sub-rule, the effects of the
additional free grain surfaces
within the feeders due to the
omission of centreline divisions
shall be taken into account in
calculating the metacentric height
referred to in sub-rule (4) (c) of
rule 2.
The correction to the metacentric
height to each feeder shall be
made in accordance with the
following formula:—
Reduction in
1.8 LB3
Metacentric
= _____________________________
Height
Displacement x Stowage
Factor
in inches
in tons
in cubic feet
per ton
where L = Length of feeder in feet
and B = Breadth of feeder in feet.
Rule 4—Common Loading.
In any ship when compartments
above one another are to be
completely filled with grain, such
compartments may be loaded as one
compartment subject to the
following conditions, namely—
(a) except as provided for in
sub-rule (4) (c) of rule 2, a
longitudinal bulkhead or shifting
board shall be, fitted:
(i)
deck to deck in the 'tween desks
of a two-deck ship;
(ii) for the upper one-third part
of the total depth of the
compartments loaded in common, in
the case of all other ships;
(b) openings, each of at least 4
square feet, shall be provided in
the wings of the deck immediately
below the uppermost deck of the
compartments loaded in common and
forward and aft of the main
hatchway. Such openings shall
provide, in combination with the
main or other hatchways, a feeding
distance of not more than 8 feet
measured in a fore and aft line;
and
(c) the provisions of rules 3 and
7 shall apply to compartments
loaded in common, as if they were
one single compartment.
Rule 5—Stowage of Partly Filled
Compartments.
(1) Except as hereafter provided,
any compartment which is partly
filled with bulk grain shall be
divided either by—
(a)
(i) a longitudinal bulkhead; or
(ii) shifting boards in line with,
or not more than 5 per cent of the
moulded breadth of the ship from
the centre line; or
(b)
(i) two or more longitudinal
bulkheads; or
(ii) shifting boards; off the
centre line of the ship provided
that the distance between them
does not exceed 60 per cent of the
moulded breadth of the ship.
(2) In every case the longitudinal
bulkheads or shifting boards shall
be properly constructed and shall
extend from the bottom of the
compartment to a height of not
less than 2 feet above the surface
of the bulk grain.
(3) Except in the case of
compartments loaded with bulk
linseed, the provisions of
sub-rules (1) and (2) of this rule
shall not apply to—
(a) those parts of a compartment
which are below or abreast of the
hatchway where—
(i)
a metacentric height of not less
than 12 inches is maintained
throughout the voyage in the case
of a single deck or two deck ship;
or
(ii) a metacentric height of not
less than 14 inches is maintained
throughout the voyage in the case
or any other ship.
(b) a compartment, which is a
hold, if the bulk grain contained
therein does not exceed one-third
of the capacity of the hold or
where such a hold is divided by a
shaft tunnel, one-half of the
capacity of that hold;
(c) a compartment other than a
hold, if bagged grain or other
suitable cargo therein is tightly
stowed in the wings to a width at
any point, of not less than 20 per
cent of the corresponding breadth
of the ship.
(d) those parts of a compartment
where the maximum breadth of the
deck head within such parts does
not exceed one-half of the moulded
breadth of the ship;
(4) When any compartment is partly
filled with bulk grain, the bulk
grain shall be levelled and topped
off with bagged grain or other
suitable cargo tightly stowed and
extending to a height of not less
than 4 feet above the top of the
bulk grain within those parts of
the compartment which are divided
by a longitudinal bulkhead or
shifting boards, and to a height
of not less than 5 feet in those
parts of a compartment which are
not so divided:
Provided that, in the case of a
compartment which is a hold in
which the bulk grain does not
exceed one-third of the capacity
of the hold or where such a hold
is divided by a shaft tunnel then
one-half of the capacity of that
hold, the depth of the bagged
grain or other suitable cargo
shall be not less than 4 feet.
(5) The bagged grain or other
suitable cargo shall be supported
on suitable platforms laid over
the whole surface of the bulk
grain. Such platforms shall
consist of:—
(a) bearers spaced not more than 4
feet apart and 1 inch boards laid
thereon spaced not more than 4
inches apart; or
(b) strong separation cloths with
adequate overlapping.
Rule 6—Trimming.
(a) All necessary and reasonable
trimming shall be performed to
minimise the effect of grain
shifting. In any compartment which
is filled with bulk grain, the
grain shall be trimmed so as to
fill all the spaces under the
decks and hatch covers to the
maximum extent Possible.
(b) After loading, all free grain
surfaces in partly filled
compartments shall be trimmed
level and the ship shall be
upright when proceeding to sea.
Rule 7—Trimming and Bagging of End
Compartments.
When the distance, measured in a
fore and aft line, from any part
of a hold or compartment to the
nearest feeder exceeds 25 feet,
the bulk grain in the end spaces
beyond 25 feet from the nearest
feeder shall be levelled off at a
depth of at least 6 feet below the
deck and the end spaces filled
with bagged grain built upon a
suitable platform. Such platforms
shall be constructed in accordance
with the requirements of rule 5
(5).
Rule 8—Limitation of Partly Filled
Compartments.
(1) Except in the case of ships in
which a metacentric height of not
less than 12 inches in the case of
single dock or two deck ships or
of not less than 14 inches in the
case of other ships is maintained
throughout the voyage, not more
than two compartments may be
partly filled with bulk grain
except that other compartments may
be partly filled with bulk grain
if they are filled up to the deck
head with bagged grain or other
suitable cargo.
For the purposes of this rule:—
(a) super imposed between decks
shall be regarded as separate
compartments, and separate from
any lower hold below them;
(b) feeders and partly filled
spaces referred to in rule 9 shall
not be regarded as compartments;
and
(c) holds or compartments provided
with one or more grain tight
longitudinal subdivisions shall be
regarded one hold or compartment.
Rule 9—Bulk Grain in Tween Decks
and Superstructures.
Bulk grain shall not be carried in
compartments which are in a
superstructure of a ship, or in
the 'tween decks of a two deck
ship, or in the uppermost 'tween
decks of a ship having more than
two decks except under the
following conditions, namely;
(a) the bulk grain or other cargo
shall be so stowed as to ensure,
maximum stability;
(b) in all cases either a
metacentric height of not less
than 12 inches in the case of
single deck of two decks ships or
of not less than 14 inches in the
case of other ships is maintained
throughout the voyage or,
alternatively, the aggregate
quantity of bulk grain or other
cargo carried in such compartments
does not exceed 28 per cent by
weight of the remaining cargo and
the Master is satisfied that the
ship will have adequate stability
throughout the voyage:
Provided that the limitation of 28
per cent specified in this clause
will not apply when the grain
cargo carried above deck or in the
upper most 'tween deck spaces
consists of oats, barley or cotton
seeds;
(c) the deck area of any part of
such compartments which contains
bulk grain and which is only
partly filled does not exceed
1,000 square feet; and
(d) all such compartments in which
bulk grain is stowed are either
sub-divided by transverse bulk
heads at intervals of not more
than 100 feet or, when this
distance is exceeded, the excess
space is entirely filled with
bagged grain or other suitable
cargo.
Rule 10—Stowage of Specially Built
Ships.
(1) The provisions of rules 2, 3,
4, 5, 7, 8 and 9 shall not apply
to any ship in which the effect of
any transverse shift of grain is
limited by means of longitudinal
divisions or other constructional
feature to such an extent that the
list resulting from a shift of
grain, calculated on the basis of
the assumptions made in sub-rule
(2) of this rule, does not exceed
5 degrees at any stage of the
voyage.
(2) In calculating. the list of a
ship referred in sub-rule (1) of
this rule, assumption shall be
made that the grain surfaces,
which are levelled, or which are
constrained by a boundary having
an angle of inclination of less
than 30 degrees to the horizontal,
settle 2 per cent by volume and
move through an angle of 12
degrees with their original
surface or 8 degrees if overstowed
in accordance with the provisions
of sub-rules (4) and (5) of rule
5.
(3) Every such ship shall carry a
grain loading plan and sufficient
stability information to show that
for the stowage arrangements to be
adopted, the calculated list
referred to in sub-rule (1) of
this rule, will not be exceeded.
Rule 11—Water Ballast Tanks.
Double bottom tanks which are
taken into account in calculating
the metacentric height referred to
in rules 2, 3, 5, 8 and 9, or in
calculating the list referred to
in rule 10, shall have adequate
watertight longitudinal
sub-division except where the
width of the tank measured at half
length does not exceed 60 per cent
of the ship's moulded breadth.
Rule 12—Bagged Grain.
Bagged grain shall be carried in
sound bags which shall be securely
closed and well filled.
Rule 13—Grain Fittings.
All timber used for grain fittings
shall be of good sound quality and
of a type and grade which has been
proved to be satisfactory for the
intended use. The actual finished
dimensions of the timber shall be
in accordance with the
requirements for the particular
fitting specified in these Rules.
Ply-wood of an exterior type,
bounded with waterproof glue and
fitted in such a manner as to
ensure that direction of the grain
in the face plies is perpendicular
to the supporting uprights or
binders, may be used provided that
its strength is equivalent to that
of solid timber of the appropriate
scantling.
Rule 14—Shifting Boards.
Every shifting board used for
complying with any of the
provisions of these Rules shall be
of the size, strength and
specification set out in the
Second Schedule.
Rule 15—Uprights.
Every upright used for complying
with any of the provisions of
these Rules except those used in
feeders to which requirements of
clause (b) of paragraph 2 of the
First Schedule apply, shall be of
the size, strength and
specification set out in the Third
Schedule.
Rule 16—Shores.
Every wooden shore used for
complying with any of the
provisions of these Rules except
those used in feeders for which
separate provisions are made in
these Rules shall be of the size,
strength and specification set out
in the Fourth Schedule.
Rule 17—Feeding Holes.
Where the depth of the hatchway
end beams or side girders exceeds
15 inches below the surface of the
deck, feeding holes spaced
approximately 2 feet apart shall
be provided as near to deck level
as practicable to allow the grain
to flow through such beams or
girders into the compartments.
Such feeding holes shall be of 2
inches in diameter where the depth
of the hatchway end beams or side
girders exceeds 15 inches but does
not exceed 18 inches and of 3½
inches in diameter where such
depth exceeds 18 inches.
Rule 18—Authorisation and Loading
Plans.
(1) A document of authorisation or
an approved grain loading plan
issued for a ship, whether by the
Government of Ghana or by any
other Government on behalf of the
Government of Ghana, shall be
accepted as evidence that the ship
is capable of complying with the
requirements of these Rules.
(2) Such a document or plan shall
be issued after taking the
requirements of these Rules into
account. It shall indicate typical
loading conditions including the
main characteristics of any
fittings used to prevent the cargo
from shifting.
(3) The document or plan shall
accompany and refer to the
stability data for the ship and
the heeling moments induced by the
grain cargo and shall be in such
form as will enable the master to
meet the requirements of these
Rules.
(4) A copy of such document or
plan shall be placed on board in
order that the master if so
required, shall produce it for the
inspection of proper authorities
of the country of the port of
loading.
Rule 19—Equivalents.
The Commissioner may, if he is
satisfied, permit the use of any
fitting or material or permit the
vessel to load grain in bulk in a
manner other than that required by
these Rules.
Rule 20—Exemptions.
The Commission may, if he
considers that the sheltered
nature and conditions of the
voyage are such as to render the
application of any of these Rules
unreasonable or unnecessary,
exempt an individual ship from
those requirements.
Rule 21—Offences.
Contravention of or failure to
comply with any of the provisions
of these Rules by any person shall
be deemed as failure to take all
necessary and reasonable
precautions from preventing the
grain cargoes from shifting and it
shall constitute an offence under
subsections (1) and (2) of section
205 of the Merchant Shipping Act,
1963 (Act 183).
Rule 22—Interpretation.
In these Rules, unless the context
otherwise requires:—
“Commissioner” means the
Commissioner responsible for
shipping;
“Compartment” means a hold or a
cargo space bounded by bulkheads
at each end and having decks above
and below;
“filled” refers to any compartment
in which after loading and
trimming, the level of the bulk
grain therein is as high as
possible;
“grain” includes wheat, maize
(corn), oats, rye, barley, rice,
pulses, seeds and processed forms
thereof, whose behaviour is
similar to that of grain in its
natural state.
Rule 23—Rules Ceasing to Apply.
The Merchant Shipping (Grain)
Rules, 1965 made under the United
Kingdom Merchant Shipping Act, and
applied to Ghana by section 320
(5) of the Merchant Shipping Act,
1963 (Act 183), shall cease to
apply.
SCHEDULES
FIRST SCHEDULE
CONSTRUCTION OF FEEDERS AND
BULKHEADS
1. Feeders and bulkheads shall be
of sufficient strength to
withstand the pressure of the
grain and shall be grain tight.
2. (1) The construction of wood
feeders shall conform to either of
the specifications and methods set
out in sub-paragraphs (2) and (3)
of this paragraph.
(2) In feeders constructed of
horizontal boards and supported by
uprights, the following provisions
shall apply, namely:—
(a) Boards—The unsupported span of
2½ inches boards shall not exceed
the maximum permitted unsupported
span specified in Tables 1 and 2
hereinafter set out for feeder
sides and feeder ends
respectively. The
unsupported span for other boards
which shall not be less than 2½
inches thick shall not exceed that
obtained by modifying the span
specified in the aforesaid Tables
in direct proportion to the
thickness of the board.
Table 1
MAXIMUM PERMITTED UNSUPPORTED SPAN
OF 2½ INCH HORIZONTAL BOARDS ON
FEEDER SIDES IN FEET
Height of Feeder in
Feet Breadth of
Feeder in Feet
4
8
12
16
20
24
28
32
8
10.2
8.35
7.45
6.9
6.55
6.3
6.1
5.95
10
9.85
7.95
7.0
6.5
6.15
5.9
5.7
5.55
12
9.6
7.6
6.7
6.2
5.85
5.6
5.4
5.25
14
9.4
7.3
6.45
5.95
5.6
5.35
5.15
5.0
16
9.25
7.1
6.25
5.57
5.4
5.15
4.95
4.8
18
9.15
6.95
6.1
5.6
5.25
5.0
4.8
4.65
20
9.15
6.85
6.0
5.45
5.1
4.85
4.65
4.5
22
9.15
6.8
5.9
5.35
5.0
4.75
4.55
4.4
24
9.15
6.8
5.85
5.25
4.9
4.65
4.45
4.3
Note.—At intermediate feeder
heights or breadths the maximum
unsupported span of 2½- inch
boards shall be obtained by
interpolation.
Table 2
MAXIMUM PERMITTED UNSUPPORTED SPAN
OF 2½-INCH HORIZONTAL BOARDS ON
FEEDER ENDS IN FEET.
Height of Feeder in Feet
Length of Feeder in Feet
4
8
12
16
20
24
28
32
8
11.8
10.55
10.55
10.55
10.55
10.55
10.55
10.55
10
11.35
9.55
9.35
9.35
9.35
9.35
9.35
9.35
12
10.9
8.9
8.45
8.45
8.45
8.45
8.45
8.45
14
10.55
8.5
7.8
7.8
7.8
7.8
7.8
7.8
16
10.3
8.2
7.4
7.25
7.25
7.25
7.25
7.25
18
10.2
8.05
7.15
6.85
6.8
6.8
6.8
6.8
20
10.2
8.0
7.0
6.55
6.4
6.4
6.4
6.4
22
10.2
8.0
6.85
6.3
6.1
6.1
6.1
6.1
24
10.2
8.0
6.75
6.1
5.85
5.85
5.85
5.85
Note.—At intermediate feeder
heights or lengths the maximum
unsupported span of 2½-inch boards
shall be obtained by
interpolation.
(b) Feeder uprights.—The section
modulus in inches3 of
uprights used to support the
horizontal boards shall be not
less than that given by the
expression 1.5 Psh1 for wood
uprights or the expression 0.15
Psh1 in the case of steel uprights
where:—
P = Pressure load in
tons per foot length of feeder
side, or breadth of feeder end, on
the portion of the feeder side or
feeder end supported by the
upright, obtained respectively
from Tables 3 and 4 hereinafter
set out;
s = Half the distance
in feet between the nearest
upright or support on each side;
and
h1 = Unsupported height of
upright in feet.
Scantlings of the uprights at
feeder corners shall be sufficient
to withstand the combined stresses
due to feeder side and end
loading. Uprights constructed of
metals other than steel shall be
of equivalent strength to the
upright referred to in the
aforesaid Table 3.
Table 3
PRESSURE LOAD IN TONS PER FOOT
LENGTH OF FEEDER SIDE
Height of Feeder in Feet
Breadth of Feeder in Feet
4
8
12
16
20
24
28
32
6
0.32
0.46
0.54
0.61
0.67
0.73
0.78
0.83
8
0.48
0.7
0.84
0.96
1.06
0.15
1.23
1.3
10
0.65
1.98
1.19
1.36
1.5
1.63
1.74
1.84
12
0.83
1.27
1.57
1.8
1.99
2.16
2.31
2.44
14
16
1.02
1.21
1.58
1.91
1.97
2.4
2.28
2.79
2.53
3.11
2.74
3.37
2.94
3.62
2.11
3.84
18
1.41
2.26
2.85
3.33
3.72
4.04
4.34
4.61
20
1.61
2.62
3.32
3.89
4.36
4.75
5.1
5.43
22
1.81
2.98
3.8
4.47
5.03
5.50
5.9
6.29
24
2.01
3.35
4.31
5.06
5.72
6.28
6.77
7.2
Note.—At intermediate feeder
heights on breadths the pressure
load per foot length of feeder
side shall be obtained by
interpolation.
Table 4
PRESSURE LOAD IN TONS PER FOOT
BREADTH OF FEEDER END
Height of Feeder in Feet
Length of Feeder in Feet
4
8
12
16
20
24
28
32
6
0.18
0.19
0.19
0.19
0.19
0.19
0.19
0.19
8
0.30
0.34
0.34
0.34
0.34
0.34
0.34
0.34
10
0.43
0.53
0.53
0.53
0.53
0.53
0.53
0.53
12
0.57
0.74
0.77
0.77
0.77
0.77
0.77
0.77
14
0.72
0.97
1.04
1.04
1.04
1.04
1.04
1.04
16
0.88
1.23
1.35
1.36
1.36
1.36
1.36
1.36
18
1.02
1.49
1.68
1.72
1.72
1.72
1.72
1.72
20
1.18
1.75
2.02
2.11
2.13
2.13
2.13
2.13
22
1.34
2.02
2.38
2.52
2.57
2.57
2.57
2.57
24
1.5
2.28
2.75
2.96
3.06
3.06
3.06
3.06
Note.—At intermediate feeder
heights or lengths the pressure
load per foot of feeder end shall
be obtained by interpolation.
(c) Wire stays.—The breaking
strength in tons of horizontal
wire stays used to support feeder
side, or end uprights shall be not
less than that given by the
expression 3PS where—
P = Pressure load in tons
per foot length of feeder side, or
breadth of feeder end, on the
portion of feeder side or feeder
end supported by the wire stays,
obtained respectively from tables
3 and 4 hereinbefore set out;
S = Half the distance in feet
between the nearest upright or
support on each side.
(d) Shores.—The moment of inertia
in inches4 of shores used to
support feeder side or end
uprights shall be not less than
that
PSL2
given by the expression
--------------- in the case of
wood
16.3 COS Ø
PSL2
shores or by the expression
-------------- in the case of
steel shores
308 COS Ø
where:—
P = Pressure load in tons
per foot length of feeder side, or
breadth of feeder end, on the
portion of feeder side or feeder
end supported by the shore
obtained respectively from tables
3 and 4 hereinbefore set out;
S = Half the distance
in feet between the nearest
upright or support on each side;
L = Length of shore in
feet; and
Ø = Inclination of the shore
to the horizontal which shall be
not greater than 45 degrees.
(3) Where feeders are constructed
of vertical boards, the following
provisions shall apply namely;
(a) Boards.—The thickness of
vertical boards in inches shall be
not
Ö3PH
less than that given by the
expression -------------where
2
P = Pressure load in tons per foot
length of feeder side or breadth
of feeder end on the portion of
feeder side or feeder end
supported by the boards obtained
respectively from tables 3 and 4
hereinbefore set out; and
H = Unsupported span of boards in
feet.
(b) Binders.—The section
modulus in inches2 of horizontal
binders used to support the
vertical boards shall not be less
than that given by the expression
1.5 PS2 in the case of wood
binders or by the expression 0.15
PS2 in the case of steel binders
where:—
P = Pressure load in
tons per foot length of feeder
side or breadth of feeder end, on
the portion of feeder side or
feeder end supported by the
binder, obtained respectively from
Tables 3 and 4 hereinbefore set
out. The vertical extent of the
feeder supported by the binder
shall be taken as half the
distance between the nearest
supports above and below the
binders; and
S = Unsupported length
of binder in feet.
Binders constructed of metals
other than steel shall be of
equivalent strength to steel
binders.
Where binders are formed by two
planks or metal angle bars or
other sections, one fitted on each
side of the vertical boards, the
elective section modulus shall be
taken as 70 per cent of the
section modulus obtained by
considering each plank or metal
angle bar or other section to be
fully effective about the neutral
axis of the combined section.
(c) Wire stays.—The breaking
strength in tons of horizontal
wire stays used to support binders
shall not be less than that given
by the expression 3PS where:—
P = Pressure load in
tons per foot length of feeder
side or breadth of feeder end on
the portion of feeder side or
feeder end supported by the
binder, obtained respectively from
Tables 3 and 4 hereinbefore set
out. The vertical extent of the
feeder supported by the binder
shall be taken as half the
distance between the nearest
support above and below the
binders;
S = Half
the distance in feet between the
nearest support on each side.
(d) Shores.—The moment of inertia
in inches4 of shores used to
support binders shall be not less
than that given by the expression
PSL2
--------------- in the case of
wood shores or by the expression
16.3 COS
Ø
PSL2
---------------- in the case
of steel shores where:—
308 COS Ø
P and S have the same meaning as
given in sub-paragraph (c) of this
paragraph.
Ø = the inclination of the shore
to the horizontal which shall be
not greater than 45 degrees; and
L = Length of shore in feet.
SECOND SCHEDULE
REQUIREMENTS FOR SH1FTING BOARDS
(1) Shifting boards shall have a
thickness of not less than 2
inches and shall be fitted
grain-tight and supported by
uprights where necessary.
(2) The maximum unsupported span
of shifting boards of various
thickness shall be as follows:—
Thickness
Maximum
unsupported
span
2
inches ..
..
.. 8 feet
2½ inches ..
..
..
11 feet
3
inches ..
..
.. 12 feet
(3) The ends of all shifting
boards shall be securely housed
with a 3-inch minimum bearing
length.
(4) Where shifting boards of 2½
inches or 3 inches are used, the
boards may be butt-jointed in way
of the uprights and at least 4
inches of board shall be
supported. Where shifting boards
of 2 inches are used, the joints
shall overlap by at least 9 inches
at the uprights.
(5) Where no permanent grain tight
divisions exist, wood filling
pieces of the same thickness as
the shifting boards shall be
securely fitted grain-tight
between the beams.
THIRD SCHEDULE
REQUIREMENTS FOR UPRIGHTS
(1) The horizontal distances
between the centres of the
uprights except those used in
feeders to which requirement of
clause (2) (b) of paragraph 2 of
the First Schedule apply, shall be
appropriate for the spans of
boards set out in the Second
Schedule. Such distances shall, in
no case, be greater than, 13 feet.
Unless means are provided to
prevent the end uprights being
dislodged from their sockets, the
depth of housing at each end of
each upright shall not be less
than 3 inches. If an upright is
not secured at the top, the upper
most shore or stay shall be not
more than 18 inches down from the
deck or top of the upright.
(2) The vertical unsupported span
of an upright supported on each
side by wood shores complying with
the requirements of the Fourth
Schedule or by wire stays
complying with the requirements of
the Fifth Schedule shall be either
the distance between the shores or
stays or the distance from the
ends of the uprights to the
nearest shore or stay whichever is
greater.
(3) Wood uprights shall consist of
two planks, one on each side of
the Shifting board. They
shall be through bolted in a
reeled pattern at alternate boards
and shall conform with the
scantling given in the following
Table 1, namely—
Table I
SCANTLINGS OF DOUBLE WOOD PLANK
UPRIGHTS IN INCHES
Vertical Unsupported Span in Feet
Horizontal Distance between Centre
of Uprights in Feet
7
8
9
10
11
12
13
Holds
Up to 6
..
10 × 2
10 × 2
10 × 2
10 × 2
10 × 2
10 × 2
10 × 2
8
..
10 × 2
10 × 2
10 × 2
9 × 3
9 × 3
9 × 3
9 × 3
10 ..
9 × 3
9 × 3
9 × 3
9 × 3
9 × 3
9 × 3
11 × 3
12
..
9 × 3
9 × 3
9 × 3
11 × 3
11 × 3 11
× 3
9 × 4
14
..
11 × 3
11 × 3
11 × 3
9 × 4
9 × 4
9 × 4 12 ×
4
16
..
9 × 4
9 × 4
9 × 4
9 × 4
12 × 4 12
× 4 12 × 4
18
..
9 × 4
9 × 4
12 × 4
12 × 4
12 × 4 12
× 4
—
20
..
12 × 4
12 × 4
12 × 4
12 × 4
—
—
—
22
..
12 × 4
12 × 4
—
—
—
—
—
Tween Decks and
superstructures
Up to 6
..
10 × 2
10 × 2
10 × 2
10 × 2
10 × 2
10 × 2
10 × 2
8
..
10 × 2
10 × 2
10 × 2
9 × 3
9 × 3
9 × 3
9 × 3
10
..
9 × 3
9 × 3
9 × 3
11 × 3
11 × 3
11 × 3
11 × 3
12
..
11 × 3
11 × 3
11 × 3
11 × 3
9 × 4
9 × 4
9 × 4
14
..
11 × 3
9 × 4
9 × 4
9 × 4
12 × 4
12 × 4
12 × 4
17
..
9 × 4
12 × 4
12 × 4
12 × 4
12 × 4
12 × 4
—
18
..
12 × 4
12 × 4
12 × 4
—
—
—
—
Thickness of Horizontal Boards in
inches
2
2
2½
2½
2½
3
3
Note.—At intermediate vertical
spans or horizontal distances the
scantlings applicable to the next
higher span or spacing shall
apply.
(4) Steel uprights shall conform
with the section modulus given in
the following Table, namely:—
Table 2
SECTION MODULUS OF STEEL UPRIGHTS
IN INCHES3
Vertical Unsupported Span in Feet
Horizontal Distance between
Centres of Uprights in
Feet
7
8
9
10
11
12
13
Holds
Up to 6 ..
..
1.62
1.85
2.08
2.31
2.54
2.78
3.00
8 ..
..
2.32
2.65
2.98
3.31
3.64
3.97
4.30
10 ..
..
3.47
3.97
4.46
4.96
5.46
5.95
6.45
12 ..
..
4.63
5.29
5.95
6.61
7.27
7.93
8.59
14 ..
..
5.78
6.61
7.43
8.26
9.09
9.91
10.74
16 ..
..
6.94
7.94
8.93
9.92
10.91
11.90
12.90
18 ..
..
8.10
9.26
10.41
11.57
12.73
13.88
15.04
20 ..
..
9.25
10.58
11.90
13.22
14.54
15.86
17.19
22 ..
..
10.42
11.90
13.39
14.88
16.37
17.86
19.34
24 ..
..
11.57
13.22
14.88
16.53
18.18
19.84
21.49
26 ..
..
12.74
14.55
16.36
18.18
20.00
21.82
23.63
28 ..
..
13.89
15.87
17.86
19.84
21.82
23.81
25.79
30 ..
..
15.04
17.19
19.34
21.49
23.64
25.79
27.94
32 ..
..
16.20
18.51
20.83
23.14
25.45
27.77
30.08
34 ..
..
17.35
19.83
22.31
24.79
27.27
29.75
32.23
36 ..
..
18.52
21.16
23.81
26.45
29.10
31.74
34.39
38 ..
..
19.67
22.48
25.29
28.10
30.91
33.72
36.53
40 ..
..
20.83
23.81
26.78
29.76
32.74
35.71
38.69
Tween Decks and
super structures
up to 6 ..
..
1.85
2.11
2.38
2.64
2.90
3.17
3.43
8 ..
..
2.78
3.18
3.57
3.97
4.37
4.76
5.16
10 ..
..
3.62
4.14
4.65
5.17
5.69
6.20
6.72
12 ..
..
5.06
5.78
6.51
7.23
7.95
8.68
9.40
14 ..
..
6.51
7.44
8.37
9.30
10.23
11.16
12.09
16 ..
..
7.95
9.09
10.22
11.36
12.50
13.63
14.76
18 ..
..
9.40
10.74
12.09
13.43
14.77
16.12
17.46
Thickness of Horizontal Boards in
inches
2
2
2½
2½
2½
3
3
Note.—At intermediate vertical
spans or horizontal distances the
section modulus of steel uprights
shall be obtained by
interpolation.
(5) Where uprights are formed by
two angle bars or other sections,
one fitted on each side of the
shifting boards and though bolted
at alternate boards, the effective
section modulus shall be taken at
70 per cent of the section modulus
obtained by considering each angle
bar or section to be fully
effective about the neutral axis
of the combined section.
(6) Uprights constructed of metals
other than steel shall be of
equivalent strength to the
uprights referred to in Table 2
hereinbefore set out.
FOURTH SCHEDULE
REQUIREMENTS FOR SHORES
(1) Any wood shore except a shore
used in feeders to which
requirements of clause (d) of
paragraph 2 of the First Schedule
apply shall be in single piece and
shall be securely fixed at each
end and healed against the
permanent structure of the ship
except that it shall bear directly
against the side plating of the
ship.
(2) Subject to provisions of
paragraphs (3) and (4) of this
Schedule, the minimum size of
every such wood shore shall be as
follows:—
Length of Shore in feet
Rectangular section
in inches
Diameter
of Circular
Section
in inches
(1) Not exceeding 10 feet
..
..
..
6 × 4
5½
(2) Over 10 but not exceeding 16
feet
..
..
6 × 6
6½
(3) Over 16 but not exceeding 20
feet
..
..
6 × 6
7
(4) Over 20 but not exceeding 24
feet
..
..
8 × 6
7½
(5) Over 24 but not exceeding 28
feet
..
..
8 × 6
8
(6) Exceeding 28 feet
..
..
..
..
8 × 6
8½
Shores of 24 feet or more in
length shall be securely bridged
at approximately mid-length.
(3) Where the vertical unsupported
span of the upright is less than 8
feet or the horizontal distance
between the uprights is less than
13 feet, the size of the shore may
be reduced in proportion.
(4) Where the angle of the shore
to the horizontal exceeds 10
degrees the next larger shore to
that required under the provisions
of paragraph (2) of this Schedule
shall be fitted, provided that in
no case shall the angle between
any shore and the horizontal
exceed 45 degrees.
FIFTH SCHEDULE
REQUIREMENTS FOR STAYS
(1) Where stays are used the
following provisions shall apply:—
(a) the stays shall be fitted
horizontally and shall be of 3
inches circumference galvanised
flexible steel wire rope of 6 x 12
construction having a breaking
strength of not less than 18.6
tons;
(b) the rigging screws shall be of
1 inches diameter and shall be
fitted in accessible positions;
(c) the shackles shall be 1 inch;
(d) the eye bolts through the
uprights shall be l inches; and
(e) either eye plates of 1
inch thickness shall be securely
attached to the side stringers or
frames, or 1 inch shackles passed
through the frame.
(2) Where shifting boards do not
extend to the full depth of the
hold, the shifting boards and
their uprights shall be supported
or stayed so as to be as efficient
as shifting boards which do extend
to the full depth of the hold.
COLONEL P. K. AGYEKUM
Commissioner responsible for
Shipping
Date of Gazette Notification: 12th
July 1974.
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