COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Rule Change Notice No. 2
April 2010
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
This Rule Change Notice should be read in conjunction with the July 2008
consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

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Common Structural Rules for Bulk Carriers

Edition of July 2008

Table of contents1
Rule Change Notice No. 2-2 Loads on exposed decks considering UR S21 and loads on
non-exposed decks .................................................................................................................................... 3
Technical Background For Rule Change Notice No. 2-2 Loads on exposed decks
considering UR S21 and loads on non-exposed decks .............................................................................. 7
Rule Change Notice No. 2-3 Hatch cover .............................................................................................. 11
Technical Background For Rule Change Notice No. 2-3 Hatch Cover.................................................. 15
Rule Change Notice No. 2-4 Rudder Area Recommendation ................................................................ 19
Technical Background For Rule Change Notice No. 2-4 Rudder Area Recommendation .................... 23
Rule Change Notice No. 2-5 Lightweight .............................................................................................. 27
Technical Background For Rule Change Notice No. 2-5 Lightweight .................................................. 31
Rule Change Notice No. 2-6 Protection Measure From Grab Wire ....................................................... 35
Technical Background For Rule Change Notice No. 2-6 Protection Measure From
Grab Wire................................................................................................................................................ 39
Rule Change Notice No. 2-7 PMA......................................................................................................... 43
Technical Background For Rule Change Notice No. 2-7 PMA ............................................................. 47
Rule Change Notice No. 2-9 Recommendation No. 47 ......................................................................... 51
Technical Background For Rule Change Notice No. 2-9 Recommendation No 47 ............................... 57
Rule Change Notice No. 2-11 Welding.................................................................................................. 61
Technical Background For Rule Change Notice No. 2-11 Welding ...................................................... 67
Rule Change Notice No. 2-12 Hold Mass Curves .................................................................................. 71
Technical Background For Rule Change Notice No. 2-12 Hold Mass Curves ...................................... 83
Rule Change Notice No. 2-13 Use of Steel Grades for Hull Members .................................................. 87
Technical Background For Rule Change Notice No. 2-13 Use of steel grades for hull
member ................................................................................................................................................... 95

1•

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Note:
Rule Change Proposals 2-1, 2-8, 2-10, 2-14 and 2-16 are not included in this Rule Change Notice document
pending further consideration by IACS following feedback during the review process.

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Rule Change Notice No. 2-2
Loads on exposed decks considering UR S21 andloads on non-exposed decks
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
This Rule Change Notice should be read in conjunction with the July 2008
consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

3 / 97

Common Structural Rules for Bulk Carriers

Edition of July 2008

For technical background for Rule Changes in this present document, reference is made to separate
document Technical Background for Rule Change Notice No. 2-2.

4 / 97Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

CHAPTER 4 – DESIGN LOADS

Section 5 – External Pressures
2.

External pressures on exposed decks

2.2

Load cases H1, H2, F1 and F2

2.2.1
The external pressure pD, for load cases H1, H2, F1 and F2, at any point of an exposed deck is to beobtained, in kN/m2, from the following formula:pD  pW
where:: Pressure obtained from the formulae in Tab 4
pW: Coefficient defined in Tab 5
Table 4: Pressures on exposed decks for H1, H2, F1 and F2
Pressure pW, in kN/m2
LLL ≥ 100 m
LLL < 100 m

Location0 ≤ xLL/LLL ≤ 0.75

34.3

0.75 < xLL/LLL < 1

 x
34.3  14.8   LLL  100  4 LL  3 
L
 LL


14.9  0.195 LLL

12.2 


LLL  x LL
x5
 2   3.6 LL
9  LLL
L
LL


where:
α: Coefficient taken equal to:
α = 0.0726 for Type B freeboard ships
α = 0.356 for Type B-60 or Type B-100 freeboard ships.
xLL: X coordinate of the load point measured from the aft end of the freeboard length LLL.

Table 5: Coefficient for pressure on exposed decks
Exposed deck locationφFreeboard deck and forecastle deck
Superstructure deck, excluding forecastle deckincluding forecastle deck
1st tier of deckhouse

1.00

0.56

nd

0.42

rd

0.32

th

0.25

th

0.20

th

6 tier of deckhouse

0.15

7th tier of deckhouse and above

0.10

2 tier of deckhouse
3 tier of deckhouse
4 tier of deckhouse
5 tier of deckhouse

Rule Change Notice No. 2

0.75

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Common Structural Rules for Bulk Carriers

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CHAPTER 9 – OTHER STRUCTURES

Section 4 – SUPERSTRUCTURES AND DECKHOUSES
3.

Load model

3.2

Loads

3.2.1

Lateral pressure for decks
The lateral pressure for decks of superstructures and deckhouses, in kN/m2, is to be taken equal to: the external pressure pD defined in Ch 4, Sec 5, [2.1] for exposed decks,
 5kN/m² for unexposed decks.

6 / 97Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Technical Background For Rule Change NoticeNo. 2-2
Loads on exposed decks considering UR S21 andloads on non-exposed decks
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
The Rule Change Notice should be read in conjunction with the July 2008
consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

7 / 97

Common Structural Rules for Bulk Carriers

Edition of July 2008

This document gives the technical background of the Rule Change Notice No. 2-2 of the July 2008
edition of the Common Structural Rules for Bulk Carriers.

8 / 97Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

1 Reason for the Rule Changes
1.1

Chapter 4, Section 5, Table 4
KC references: question id 628 and 671
External pressures on exposed decks for load case H1, H2, F1 and F2 are calculated based on x/LLL
where LLL is a freeboard length as defined in Chapter 1, Section 4, [3.2], while x is the X co-ordinateof the load calculation point from the aft end of the rule length L. The aft end (AE) in Chapter 1,
Section 4, Figure 4 is relevant to the rule length L only despite the fact that positions of the aft end
and fore end in L are not the same as those in LLL. This is not in line with the text in IACS UR S21
and the amended ILLC. The distance “x” should be modified in order to reflect this difference.

1.2

Chapter 4, Section 5, Table 5
KC reference: question id 628
Table 5 in Chapter 4, Section 5 gives the exact values of pressures for hatch covers in position 1, as
stated in ILLC Reg. 16.2 (1966 and protocol 1988, as amended in 2003). Regarding the pressure on
forecastle deck, it has been noticed that it is too severe to apply the same pressure as for hatch covers
in position 1. Table 5 should be modified in order to lower the value of the pressure on forecastle
deck.

1.3

Chapter 9, Section 4, [3.2.1]
KC references: question id 693 and 785
The lateral pressure for decks of superstructures and deckhouses is defined in Chapter 9, Section 4,[3.2.1]. This requirement refers to the external pressure pD defined in Chapter 4, Section 5, [2.1],
which is a pressure for exposed deck. In case of non-exposed decks of superstructure and deckhouses,
no internal pressure is defined. Such pressure should be added Chapter 9, Section 4, [3.2.1], andshould be a value including static and dynamic effects, as it is in the Common Structural Rules for Oil
Tankers.

2 Summary of Rule Changes
2.1

Chapter 4, Section 5, Table 4
The definition of the distance “x” is modified and replaced by the new distance “xLL” which ismeasured from the aft end of freeboard length LLL: then Chapter 4, Section 5, [2.2.1] is in line with thetext in the amended ILLC and IACS UR S21.

2.2

Chapter 4, Section 5, Table 5
Since it is severe to apply the same pressure on forecastle deck as for hatch cover in position 1, Table
5 is modified by deleting the words “and forecastle deck” in the first line and deleting the word
“excluding forecastle deck” in the second line: a reduction factor of 0.75 is used to determine thepressure on forecastle.

2.3

Chapter 9, Section 4, [3.2.1]
As the scantling formulae are coming from GL Rules and in order to keep consistency, the value ofthe pressure for non-exposed decks of superstructures and deckhouses should also be based on GL
Rules. This pressure value is equal to 3.5 kN/m² in GL Rules. However, it is a static value and when
dynamic load effects are included, it gives a total pressure of 5 kN/m².
Moreover, the load on the unexposed deck is always an internal one because it is not exposed toweather.

Rule Change Notice No. 2

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3 Impact on Scantling
3.1

Chapter 4, Section 5, Table 4
There is no change in term of steel weight by comparing that before and after the proposed Rule
Change.

3.2

Chapter 4, Section 5, Table 5
It will be a change in terms of steel weight by comparing that before and after the proposed Rule
Change: the calculated pressure on forecastle deck after the Rule Change will be lower than before,
but in line with the designs of CSR bulk carriers. No scantling impact study is required to evaluate
such modification.

3.3

Chapter 9, Section 4, [3.2.1]
The scantling impact, if any, cannot be evaluated as no pressure on non-exposed deck was defined
before.

10 / 97

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Rule Change Notice No. 2-3
Hatch coverNotes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
This Rule Change Notice should be read in conjunction with the July 2008
consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

11 / 97

Common Structural Rules for Bulk Carriers

Edition of July 2008

For technical background for Rule Changes in this present document, reference is made to separate
document Technical Background for Rule Change Notice No. 2-3.

12 / 97

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

CHAPTER 9 – OTHER STRUCTURES

Section 5 – HATCH COVERS
7.

Weathertightness, closing arrangement, securing devices and stoppers

7.3

Closing arrangement, securing devices and stoppers

7.3.5

Area of securing devices
The gross net cross area of each securing device is to be not less than the value obtained, in cm2, fromthe following formula: 235 A  1.4 S S 
 ReH where:: Spacing, in m, of securing devicesSSα: Coefficient taken equal to:
α = 0.75 for ReH > 235 N/mm2
α = 1.0 for ReH ≤ 235 N/mm2
In the above calculations, ReH may not be taken greater than 0.7Rm.
Between hatch cover and coaming and at cross-joints, a packing line pressure sufficient to obtainweathertightness is to be maintained by securing devices. For packing line pressures exceeding 5
N/mm, the net cross area A is to be increased in direct proportion. The packing line pressure is to be
specified.
In the case of securing arrangements which are particularly stressed due to the unusual width of thehatchway, the net cross area A of the above securing arrangements is to be determined through direct
calculations.

Rule Change Notice No. 2

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Common Structural Rules for Bulk Carriers

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COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Technical Background For Rule Change NoticeNo. 2-3
Hatch CoverNotes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
This Rule Change Notice should be read in conjunction with the July 2008
consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

15 / 97

Common Structural Rules for Bulk Carriers

Edition of July 2008

This document gives the technical background of the Rule Change Notice No. 2-3 of the July 2008
edition of the Common Structural Rules for Bulk Carriers.

16 / 97

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

1

Edition of July 2008

Reason for the Rule Changes
Chapter 9, Section 5, [7.3.5] is the copy of a part of UR S21.5.1 which specifies A as net sectional
area. In light of UR S21.5.1, “gross cross area” is a typo which should be corrected.
As it is referred to the sectional area of securing devices, it is to be understood that the “net sectionalarea” is the “nominal sectional area”.

2

Summary of Rule Changes
In the first part of Chapter 9, Section 5, [7.3.5], the general formula for determining the “gross crossarea” A of each securing device is given. Then, in the second part of [7.3.5], some special cases are
specified and the corresponding “net cross area” A.
However, Chapter 9, Section 5, [7.3.5] is based on UR S21.5.1, in which only “net cross area” is used.
To be fully consistent with UR S21, the “gross cross area” is to be replaced by “net cross area”. In
addition, to avoid any misunderstanding, it is specified that the net cross area of the securing device isthe nominal cross area.

3

Impact on Scantling
There is no change in term of steel weight by comparing that before and after the proposed Rule
Change.

Rule Change Notice No. 2

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Common Structural Rules for Bulk Carriers

Edition of July 2008

COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Rule Change Notice No. 2-4
Rudder Area Recommendation
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
This Rule Change Notice should be read in conjunction with the July 2008
consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

19 / 97

Common Structural Rules for Bulk Carriers

Edition of July 2008

For technical background for Rule Changes in this present document, reference is made to separate
document Technical Background for Rule Change Notice No. 2-4.

20 / 97

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

CHAPTER 10 – HULL OUTFITTING

Section 1 – RUDDER AND MANOEUVRING ARRANGEMENT
1

General1.1

Manoeuvring arrangement

1.1.1
Each ship is to be provided with a manoeuvring arrangement which will guarantee sufficientmanoeuvring capability.
The manoeuvring arrangement includes all parts from the rudder and steering gear to the steering
position necessary for steering the ship.

1.3

Size of rudder area (void)
In order to achieve sufficient manoeuvring capability the size of the movable rudder area A is
recommended to be not less than obtained, in m2, from the following formula:A  c1c 2c 3 c 4

1.75LT100

where:
c1 = Factor taken equal to 0.9
c2 = Factor for the rudder type:
c2 = 1.0 in generalc2 = 0.9 for semi-spade rudders
c2 = 0.7 for high lift rudders
c3 = Factor for the rudder profile:c3 = 1.0 for NACA-profiles and plate rudderc3 = 0.8 for hollow profiles and mixed profiles
c4 = Factor for the rudder arrangement:
c4 = 1.0 for rudders in the propeller jet
c4 = 1.5 for rudders outside the propeller jet
For semi-spade rudders 50% of the projected area of the rudder horn may be included into the rudderarea A.
Where more than one rudder is arranged the area of each rudder can be reduced by 20%.
In estimating the rudder area A, [2.1] is to be considered.
(void)

Rule Change Notice No. 2

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Common Structural Rules for Bulk Carriers

Edition of July 2008

COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Technical Background For Rule Change NoticeNo. 2-4
Rudder Area Recommendation
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
This Rule Change Notice should be read in conjunction with the July 2008
consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

23 / 97

Common Structural Rules for Bulk Carriers

Edition of July 2008

This document gives the technical background of the Rule Change Notice No. 2-4 of the July 2008
edition of the Common Structural Rules for Bulk Carriers.

24 / 97

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

1

Reasons for the Rule Changes

1.1

Chapter 10, Section 1, [1.1.1] and [1.3]

Edition of July 2008

KC reference: question id 744
The formula, given in Ch 10, Sec 1, [1.3], is only a recommendation, which gives a minimum size
based on some major parameters, and is not mandatory.
The size and efficiency of the rudder has to be proven by the ITTC manoeuvring trials and thequestions relevant to manoeuvrability should not be included in structural Rules.

2

Summary of Rule Changes

2.1

Chapter 10, Section 1, [1.1.1] and [1.3][1.3] and the first sentence of [1.1.1] are deleted to avoid any misleading use of the Area
Recommendation formula.

3

Impact on Scantling

3.1

Chapter 10, Section 1, [1.1.1] and [1.3]
The now deleted formula in [1.3] is only a recommendation and not a requirement; hence there is nochange in terms of the steel weight by comparing that before and after the proposed Rule Change.

Rule Change Notice No. 2

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Common Structural Rules for Bulk Carriers

Edition of July 2008

COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Rule Change Notice No. 2-5
Lightweight
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
This Rule Change Notice should be read in conjunction with the July 2008
consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

27 / 97

Common Structural Rules for Bulk Carriers

Edition of July 2008

For technical background for Rule Changes in this present document, reference is made to separate
document Technical Background for Rule Change Notice No. 2-5.

28 / 97

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

CHAPTER 1 – GENERAL PRINCIPLES

Section 4 – SYMBOLS AND DEFINITIONS
3.

Definitions

3.7

Lightweight

3.7.1
The lightweight is the displacement, in t, without cargo, fuel, lubricating oil, ballast water, fresh waterand feed water in tanks, consumable stores and passengers and crew and their effects, but including
liquids in piping.

Rule Change Notice No. 2

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COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Technical Background For Rule Change NoticeNo. 2-5
Lightweight
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
These Technical Background for Rule Change Notice should be read in conjunction
with the July 2008 consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

31 / 97

Common Structural Rules for Bulk Carriers

Edition of July 2008

This document gives the technical background of the Rule Change Notice No. 2-5 of the July 2008
edition of the Common Structural Rules for Bulk Carriers.

32 / 97

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

1

Reason for the Rule Changes

1.1

Chapter 1, Section 4, [3.7.1]

Edition of July 2008

KC reference: question id 713
The definition of lightweight is made to be in line with the definition in the Reg.3.22 Chapter II-1 of
SOLAS.

2

Summary of Rule Changes

2.1

Chapter 1, Section 4, [3.7.1]
According to Reg.3.22 Chapter II-1 of SOLAS, “Lightweight is the displacement of a ship in tonnes
without cargo, fuel, lubricating oil, ballast water, fresh water and feedwater in tanks, consumable
stores, and passengers and crew and their effects.”, the rule change is made to be in line with thedefinition in it.

3

Impact on Scantling

3.1

Chapter 1, Section 4, [3.7.1]
There is no change in terms of the steel weight by comparing that before and after the proposed Rule
Change.

Rule Change Notice No. 2

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COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Rule Change Notice No. 2-6
Protection Measure From Grab Wire
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
This Rule Change Notice should be read in conjunction with the July 2008
consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

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Edition of July 2008

For technical background for Rule Changes in this present document, reference is made to separate
document Technical Background for Rule Change Notice No. 2-6.

36 / 97

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

CHAPTER 3 – STRUCTURAL DESIGN PRINCIPLES

Section 6 – STRUCTURAL ARRANGEMENT PRINCIPLES
9.

Deck structure

9.5

Hatch supporting structures

9.5.4
For ships with holds designed for loading/discharging by grabs and having the additional classnotation GRAB[X], Wwire rope grooving in way of cargo holds openings is to be prevented by fitting
suitable protection such as half-round bar on the hatch side girders (i.e. upper portion of top side tankplates)/hatch end beams in cargo hold or and upper portion of hatch coamings.

Rule Change Notice No. 2

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COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Technical Background For Rule Change NoticeNo. 2-6
Protection Measure From Grab Wire
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
This Technical Background For Rule Change Notice should be read in conjunction
with the July 2008 consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

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Common Structural Rules for Bulk Carriers

Edition of July 2008

This document gives the technical background of the Rule Change Notice No. 2-6 of the July 2008
edition of the Common Structural Rules for Bulk Carriers.

40 / 97

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

1

Reasons for the Rule Changes

1.1

Chapter 3, Section 6, [9.5.4]

Edition of July 2008

SOLAS XII/6.5.1 applies to ships having length L of 150m or above and carrying the cargoes of
1 t/m3 and above, i.e. BC-A and BC-B ships. Accounting for the reality, protection measure fromloading/discharge equipment wire, such as grab, should be taken for bulk carriers.
In the CSR for BC, the additional class notation "GRAB" is mandatory for BC-A and BC-B ships andis voluntary for ships other than BC-A and BC-B ships.
Therefore, this requirement should apply to ships having the additional class notation GRAB [X]
including those ships other than BC-A and BC-B ships
To be in line with SC 208, the position to fit protection bars is specified.

2

Summary of Rule Changes

2.1

Chapter 3, Section 6, [9.5.4]
The application of [9.5.4] is added, referring to those ships having the additional class notation
GRAB[X].
The conjunction “or” is changed to “and”.

3

Impact on Scantling

3.1

Chapter 3, Section 6, [9.5.4]
There is no change in terms of steel weight by comparing that before and after the proposed Rule
Change.

Rule Change Notice No. 2

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Common Structural Rules for Bulk Carriers

Edition of July 2008

COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Rule Change Notice No. 2-7
PMA
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
This Rule Change Notice should be read in conjunction with the July 2008
consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

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Common Structural Rules for Bulk Carriers

Edition of July 2008

For technical background for Rule Changes in this present document, reference is made to separate
document Technical Background for Rule Change Notice No. 2-7.

44 / 97

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

CHAPTER 1 – GENERAL PRINCIPLES

Section 3 – FUNCTIONAL REQUIREMENTS
2.

Definition of functional requirements

2.5

Means of access

2.5.1
Ship structures subject to overall and close-up inspection and thickness measurements are to beprovided with means capable of ensuring safe access to the structures. The means of access are to be
described in a Ship Structure Access Manual for bulk carriers of 20,000 gross tonnage and over.
Reference is made to SOLAS, Chapter II-1, Regulation 3-6.

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CHAPTER 2 – GENERAL ARRANGEMENT DESIGN

Section 3 – ACCESS ARRANGEMENT
1.

General

1.0

Application

1.0.1
This section applies to ships of 20,000 gross tonnage and over.

1.1

Means of access to cargo and other spaces

1.1.1
Ref. SOLAS Reg.II-1/3-6 .2.1 (Resolution MSC.151(78))
Each space is to be provided with means of access to enable, throughout the life of a ship, overall andclose-up inspections and thickness measurements of the ship’s structures. Such means of access are tocomply with [1.3] and [2].

1.1.2
Ref. SOLAS Reg.II-1/3-6 .2.2 (Resolution MSC.151(78))
Where a permanent means of access may be susceptible to damage during normal cargo loading andunloading operations or where it is impracticable to fit permanent means of access, theAdministration may allow, in lieu thereof, the provision of movable or portable means of access, as
specified in [2], provided that the means of attaching, rigging, suspending or supporting the portablemeans of access forms a permanent part of the ship’s structure. All portable equipment are to becapable of being readily erected or deployed by ship’s personnel.

1.1.3
Ref. SOLAS Reg.II-1/3-6 .2.3 (Resolution MSC.151(78))
The construction and materials of all means of access and their attachment to the ship’s structure are
to be to the satisfaction of the Society.

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Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Technical Background For Rule Change NoticeNo. 2-7
PMA
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
This Technical Background For Rule Change Notice should be read in conjunction
with the July 2008 consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

47 / 97

Common Structural Rules for Bulk Carriers

Edition of July 2008

This document gives the technical background of the Rule Change Notice No. 2-7 of the July 2008
edition of the Common Structural Rules for Bulk Carriers.

48 / 97

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

1

Reasons for the Rule Changes

1.1

Chapter 1, Section 3, [2.5.1]

Edition of July 2008

KC reference: question id 351
The change is made to be in line with the SOLAS II-1/3-6.

1.2

Chapter 2, Section 3, [1]KC references: questions id 351 & 853
These changes are made to be in line with the SOLAS II-1/3-6 and the Resolution MSC.151/158(78).

2

Summary of Rule Changes

2.1

Chapter 1, Section 3, [2.5.1]
According to the SOLAS II-1/3-6, the requirement is to be applied to bulk carriers of 20,000 gross
tonnage and above, the application of the requirement for PMA is specified in a new sub-article
named “Application”, referring to the whole section 3.

2.2

Chapter 2, Section 3, [1]According to the SOLAS II-1/3-6 and the Resolution MSC.151/158 (78), the requirements are to be
applied to bulk carriers of 20000 gross tonnage and above.

3

Impact on Scantling

3.1

Chapter 1, Section 3, [2.5.1]
There is no change in terms of steel weight by comparing that before and after the proposed Rule
Change.

3.2

Chapter 2, Section 3, [1]There is no change in terms of steel weight by comparing that before and after the proposed Rule
Change.

Rule Change Notice No. 2

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Common Structural Rules for Bulk Carriers

Edition of July 2008

COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Rule Change Notice No. 2-9
Recommendation No. 47
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
This Rule Change Notice should be read in conjunction with the July 2008
consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

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Common Structural Rules for Bulk Carriers

Edition of July 2008

For technical background for Rule Changes in this present document, reference is made to separate
document Technical Background for Rule Change Notice No. 2-9.

52 / 97

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

CHAPTER 11 – CONSTRUCTION AND TESTING

Section 1 – CONSTRUCTION
1.

Structural details

1.2

Cold forming

1.2.1
For cold forming (bending, flanging, beading) of plates corrugated bulkhead the minimum average
inside bending radius is to be not less than 32t (t = as-built thickness).
In order to prevent cracking, flame cutting flash or sheering burrs are to be removed before cold
forming. After cold forming all structural components and, in particular, the ends of bends (plateedges) are to be examined for cracks. Except in cases where edge cracks are negligible, all cracked
components are to be rejected. Repair welding is not permissible.

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Common Structural Rules for Bulk Carriers

1.3

Edition of July 2008

Assembly, alignment

1.3.1
Table 1: Alignment (t, t1 and t2: as-built thickness)
DetailAlignment of butt welds

Standarda ≤ 0.15t strengtha ≤ 0.2t other

Alignment of fillet weldsa) Strength and higher
tensile steela ≤ t1 / 4 measured on the
mediana ≤ (5t1 – 3t2) / 6
measured on the heel lineb) Othera ≤ t1 / 2 measured on the
mediana ≤ (2 t1 – t2) / 2 measured
on the heel lineLimita ≤ 3.0 mm
a ≤ 0.15t strength
membera ≤ 0.2t otherbut maximum 4.0 mm

Strength member andhigher stress member:a ≤ t1/3
Other:a≤ t1/2

Remarkst is the lesser plate
thickness

Alternatively, heel line
can be used to check thealignment.
Where t2 t3 is less thant1, then t2 t3 should besubstituted for t1.

Alignment of fillet weldsa) Strength and higher
tensile steela ≤ t1 / 3 measured on the
medianb) Othera ≤ t1 / 2 measured on theheel line

Strength member andhigher stress member:a ≤ t1/3
Other:a ≤ t1/2

Alternatively, heel line
can be used to check thealignment.
Where t3 is less than t1,
then t3 should besubstitute for t1.

Note:“strength” means the following elements: strength deck, inner bottom, bottom, lower stool, lower part oftransverse bulkhead, bilge hopper and side frames of single side bulk carriers.

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Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

Alignment of face plates of T
longitudinal

Alignment of height of T-bar,
L-angle bar or bulb

Strength membera ≤ 0.04b strengtha = 8.0 mm

Strength membera ≤ 0.15 t for
primary supporting
membersOthera ≤ 0.2 t forordinary stiffeners

a = 3.0 mm

Alignment of panel stiffenerd ≤ L / 50

Note:“strength” means the following elements: strength deck, inner bottom, bottom, lower stool, lower part oftransverse bulkhead, bilge hopper and side frames of single side bulk carriers.

Rule Change Notice No. 2

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Common Structural Rules for Bulk Carriers

Edition of July 2008

COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Technical Background For Rule Change NoticeNo. 2-9
Recommendation No 47
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
This Technical Background For Rule Change Notice should be read in conjunction
with the July 2008 consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

57 / 97

Common Structural Rules for Bulk Carriers

Edition of July 2008

This document gives the technical background of the Rule Change Notice No. 2-9 of the July 2008
edition of the Common Structural Rules for Bulk Carriers.

58 / 97

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

1

Reasons for the Rule Changes

1.1

Chapter 11, Section 1, [1.2.1]

Edition of July 2008

These changes are made to be in line with the Revision 4 of IACS Recommendation No.47.

1.2

Chapter 11, Section 1, Table 1
These changes are made to be in line with the Revision 4 of IACS Recommendation No.47.

2

Summary of Rule Changes

2.1

Chapter 11, Section 1, [1.2.1]
The “plates” is changed to “corrugated bulkhead”; the “3t” is changed to “2t”.

2.2

Chapter 11, Section 1, Table 1
These changes are made according to the Revision 4 of IACS Recommendation No.47.

3

Impact on Scantling

3.1

Chapter 2, Section 1, [3.1.1]
There is no change in terms of steel weight by comparing that before and after the proposed Rule
Change.

3.2

Chapter 9, Section 3, [2.1.2]
There is no change in terms of steel weight by comparing that before and after the proposed Rule
Change.

Rule Change Notice No. 2

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Common Structural Rules for Bulk Carriers

Edition of July 2008

COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Rule Change Notice No. 2-11
Welding
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
This Rule Change Notice should be read in conjunction with the July 2008
consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

61 / 97

Common Structural Rules for Bulk Carriers

Edition of July 2008

For technical background for Rule Changes in this present document, reference is made to separate
document Technical Background for Rule Change Notice No. 2-11.

62 / 97

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

CHAPTER 11 – CONSTRUCTION AND TESTING

Section 2 – WELDING
2.

Types of welded connections

2.6

Fillet welds

2.6.1

Kinds and size of fillet welds and their applications
Kinds and size of fillet welds for as-built thickness of abutting plating up to 50 mm are classed into 5
categories as given in Tab 1 and their application to hull construction is to be as required by Tab 2.
In addition, for zones “a” and “b” of side frames as shown in Ch 3, Sec 6, Fig 19, the weld throats areto be respectively 0.44t and 0.4t, where t is as-built thickness of the thinner of two connected
members.
Table 1: Categories of fillet welds

Category

Kinds of fillet
welds

F0

Double continuous
weld

F1

Double continuous
weld

F2

Double continuous
weld

As-built thickness ofabutting plate, t, in mm

Leg length offillet weld, in
mm (2), (3)Lengthof fillet
welds, inmm

Pitch,
in
mm

t

0.7t

-

-

t ≤ 1010 ≤ t < 2020 ≤ tt ≤ 100.5t + 1.0
0.4t + 2.0
0.3t + 4.0
0.4t + 1.0--

10 ≤ t < 20

0.3t + 2.0--

0.2t + 4.0
0.3t + 1.0
0.2t + 2.0
0.1t + 4.0
0.5t + 1.0

-

-

-

-

0.4t + 2.0

75

300

(1)

F3

Double continuous
weld

20 ≤ tt ≤ 1010 ≤ t < 2020 ≤ tt ≤ 10F4Intermittent weld

10 ≤ t < 2020 ≤ t0.3t + 4.0(1) t is as-built thickness of the thinner of two connected members the abutting plate, in mm. In
case of cross joint as specified in Fig 1, t is the thinner thickness of the continuous member andthe abutting plate, to be considered independently for each abutting plate.
(2) Leg length of fillet welds is made fine adjustments corresponding to the corrosion addition tC
specified in Ch 3, Sec 3, Tab 1 as follows:+ 1.0 mm fortC > 5+ 0.5 mm for5 ≥ tC > 4+ 0.0 mm for4 ≥ tC > 3- 0.5 mm fortC ≤ 3(3)

Rule Change Notice No. 2

The weld sizes are to be rounded to Leg length is rounded to the nearest half millimetre.

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Table2: Application of fillet welds
Hull area

General,unlessotherwise
specified in
the table (1)Connection
Of
To
Watertight plate
Boundary plating
Brackets at ends of members
Deep tank bulkheads
Ordinary stiffener andWeb of primary supporting members andcollar platecollar plates
Plating (Except deep tank bulkhead)
Face plates of At ends (15% of span)
Web of ordinary stiffenerbuilt-up
Elsewhere
stiffeners
End of primary supporting
Deck plate, shell plate, inner bottom plate,members and ordinary
bulkhead plate
stiffeners without brackets
End of primary supporting
Deck plate, shell plate, inner bottom plate,members and ordinary
bulkhead plate
stiffeners with brackets
Ordinary stiffener
Bottom and inner bottom plating
Shell plates in strengthened bottom forward
Center girder
Inner bottom plate and shell plate except theabove
Side girder includingintercostal plate

Bottom anddoublebottomBracket on center girder
Web stiffener

Shell plates
and inner
At ends, on a length equal tobottomtwo frame spaces
platesCenter girder and side girders in way of
hopper tanks
Elsewhere
Center girder, inner bottom and shell plates
Floor and girder

Web of primary supporting
members

Side plating, inner side plating and web ofprimary supporting members

Side frame and end bracket

Side shell plate

Tripping bracket

Side shell plate and side frame

Floor

Side andinner sidein double
side
structure
Side frameof single
side
structure

Strengthdeckt ≥ 13t < 13

Other deckDeck

64 / 97

Bottom and inner bottom plating

Side shell plating within 0.6L midship
Elsewhere
Side shell plating
Side shell plating
Ordinary stiffeners

Ordinary stiffener andintercostal girder

Deck plating

Hatch coamings

Deckplating

Web stiffeners

Coaming webs

Category
F1
F1
F3
F2
F4
F2
F4
F0
F1
F3
F1
F2
F3

F2
F2
F3
F2
F3
F2
Sea Ch 3
Sec 6 Fig.
19
F1
Deep
penetration
F1
F1
F2
F4
F3

At corners of hatchways for
15% of the hatch length
Elsewhere

F1
F2
F4

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Hull area

Bulkheads

ConnectionOf
Non-watertight bulkhead
structure
Ordinary stiffenerPrimary
supporting
members (1)After peakSeating

Web plate and girder plate

Internal members

Girder and bracket

External bulkhead
Superstructureand deckhouses

Edition of July 2008

Ordinary stiffeners
End section of ordinary
stiffener and Primary
supporting member

CategoryTo

Boundaries

Swash bulkheads

Bulkhead
plating
Shellplating,deck
plating,
innerbottomplating,bulkheadAt ends (25% of span), where
no end brackets are fitted
At end (15% of span)

F1

Elsewhere

F2

In tanks, and located within
0.125L from fore peak
Face plate
Face area exceeds 65 cm2
Elsewhere
Boundaries and each otherIn way of main engine, thrust
Bed platebearing, boiler bearers andmain generator engines
In way of main engine andGirder platethrust bearing
Inner
In way of main engine andbottom platethrust bearing
and shell
Deck
Side wall
At end (15% of span)and deck
Elsewhereplate
Without
brackets
Side wall and web of primaryWithbracketsupporting members

F3
F1

F2
F2
F3
F2
F1
F1
F2
F1
F3
F4(2)
F1
F2

Heel andF1
head
Ventilator
Coaming
Deck
F1
Vertical frames forming main piece
F1
RudderRudder frame
Rudder plate
F3
Rudder frames except above
F2(1) For Hatch cover, weld sizes F1, F2 and F3 instead of F0, F1 and F2, respectively, are to be used.
PillarPillar(2) Where the one side continuous welding is applied, the weld size F3 is to be applied.
(3) The interior bulkheads are not included in this category. The welding of the interior bulkheads is tobe subjected to the discretion of the Society.

Rule Change Notice No. 2

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Edition of July 2008

COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Technical Background For Rule Change NoticeNo. 2-11
Welding
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
The Technical Background For Rule Change Notice should be read in conjunction
with the July 2008 consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

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Edition of July 2008

This document gives the technical background of the Rule Change Notice No. 2-11 of the July 2008
edition of the Common Structural Rules for Bulk Carriers.

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Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

1

Edition of July 2008

Reason for the Rule Changes
KC references: questions id 507, 651, 669, 672, 781 and 803
The note (3) of Table 1 regarding rounding operation for determining the weld size is added forclarification.
Table 2 is revised for clarifying the application of primary supporting members and end connection ofordinary stiffener and primary supporting members with bracket in accordance with the KC # 651 and#672. In addition, the applications for one side welding, which is normally applied to the connectionof ordinary stiffener with the wall or deck of superstructure or deckhouses and for welding of hatch
cover, are added for clarification according to KC #781 and #803.

2

Summary of Rule Changes

2.1

Table 1
Fillet weld size should be determined by rounding the value obtained by this Table.

2.2

Table 2
1) Categories for the case where a bracket is provided at the end connection of ordinary stiffener andprimary supporting member are added and weld size of such connection is “F1”.
2) Primary supporting member is clarified.
3) Weld size of ordinary stiffener and primary supporting members in superstructures anddeckhouses is added.
4) Application of weld size for hatch cover is added as a note of Table 2.

3

Impact on Scantling
Weld size where the thickness of abutting plate is different may be bigger, but the impact may be lessbecause the current weld design is determined based on the abutting plate thickness as proposed bythis RCP.

Rule Change Notice No. 2

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COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Rule Change Notice No. 2-12
Hold Mass Curves
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
This Rule Change Notice should be read in conjunction with the July 2008
consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

71 / 97

Common Structural Rules for Bulk Carriers

Edition of July 2008

For technical background for Rule Changes in this present document, reference is made to separate
document Technical Background for Rule Change Notice No. 2-12.

72 / 97

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

CHAPTER 4 – DESIGN LOADS

Appendix 1 – HOLD MASS CURVES
Symbols
h

:

ha

:

hf

:

MH
MFull
MHD
MD
MBLK

:
:
:
:
:

THB
:
Ti
:
VH
:
Vf and Va :
Tmin

:

Σ

:

Vertical distance from the top of inner bottom plating to the lowest point of the upper
deck plating at the ship’s centreline, in m.
Vertical distance from the top of inner bottom plating to the lowest point of the upper
deck plating at the ship’s centreline of the aft cargo hold in a block loading, in m.
Vertical distance from the top of inner bottom plating to the lowest point of the upper
deck plating at the ship’s centreline of the fore cargo hold in a block loading, in m.
As defined in Ch 4, Sec 7
As defined in Ch 4, Sec 7
As defined in Ch 4, Sec 7
The maximum cargo mass given for each cargo hold, in t
The maximum cargo mass in a cargo hold according to the block loading condition in
the loading manual, in t
As defined in Ch 4, Sec 7
Draught in loading condition No. i, at mid-hold position of cargo hold length ℓH , in m
As defined in Ch 4, Sec 6
Volume of the forward and after cargo hold excluding volume of the hatchway part, in
m3.
0.75TS or draught in ballast conditions with the two adjacent cargo holds empty,
whichever is greater, in m.
The sum of masses of two adjacent cargo holds

2

Maximum and minimum masses of cargo in each hold2.1

Maximum permissible mass and minimum required masses of single cargo hold inseagoing condition

2.1.1

GeneralThe cargo mass curves of single cargo hold in seagoing condition are defined in [2.1.2] to [2.1.5].
However if the ship structure is checked for more severe loading conditions than the ones consideredin Ch 4, Sec 7, [3.7.1], the minimum required cargo mass and the maximum allowable cargo mass canbe based on those corresponding loading conditions.

2.1.2


BC-A ship not having {No MP} assigned

For loaded holds
The maximum permissible mass (Wmax(Ti)) at various draughts (Ti) is obtained, in t, by the following
formulae:
Wmax (TS )  M HD  0.1M H

Wmax (Ti )  M HD  0.1M H  1.025V H

TS  Ti hHowever, Wmax(Ti) is in no case to be greater than MHD.

Rule Change Notice No. 2

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Common Structural Rules for Bulk Carriers

Edition of July 2008

The minimum required cargo mass (Wmin(Ti)) at various draughts (Ti) is obtained, in t, by thefollowing formulae:

Wmin (Ti )  0
Wmin (Ti )  1.025VHTi  0.83TS hforTi  0.83TSforTS  Ti  0.83TS

For empty holds which can be empty at the maximum draught

The maximum permissible mass Wmax(Ti) at various draughts Ti is obtained, in t, by the following
formulae:

Wmax (Ti )  M Full
Wmax (Ti )  M Full  1.025VH

0.67TS  Ti hforTS  Ti  0.67TS

forTi  0.67TS

The minimum required mass (Wmin(Ti)) is obtained, in t, by the following formula:

Wmin (Ti )  0

Ti  TSfor

Examples for mass curve of loaded cargo hold and cargo hold which can be empty at the maximum
draught for BC-A ships not having {No MP} assigned are shown in Fig 1.
1.15 (MHD + 0.1MH)

1.15 MFull

M HD+0.1 M H
M HD

M FullHarbourHarbourCargo mass

Cargo mass

0.15M Full

0.15(M
0.15
M HD +0.1 M H)

Seagoing

Seagoing

00.67T S 0.83T S

TS

0Draught(a) Loaded hold

0.67TSTS

Draught(b) Cargo hold which can be empty at the maximum draught

Figure 1: Example of mass curve for BC-A ships not having {No MP} assigned

2.1.3


BC-A ship with {No MP} having {No MP} assigned

For loaded holds

The maximum permissible mass (Wmax(Ti)) at various draughts (Ti) is the same specified in [2.1.2].
The minimum required mass (Wmin(Ti)) is obtained, in t, by the following formulae:

Wmin (Ti )  0
Wmin (Ti )  1.025VH

Ti  THB 
hWmin (Ti )  0.5M H  1.025VH

74 / 97TS  Ti   0hforTi  THBforTS  Ti  THB orforTS  Ti

For empty hold which can be empty at the maximum draught

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

The maximum permissible mass (Wmax(Ti)) and the minimum required mass (Wmin(Ti)) at various
draughts ( Ti ) are the same specified in [2.1.2].
The maximum permissible mass (Wmax(Ti)) at various draughts (Ti) is obtained, in t, by the following
formulae:

Wmax (Ti )  M Full  1.025VH

TS  Ti hThe minimum required cargo mass (Wmin(Ti)) at various draughts (Ti) is obtained, in t, by thefollowing formulae:

Wmin (Ti )  0

Ti  TSfor

Examples for mass curve of cargo hold for BC-A ships, having {No MP} assigned are shown in Fig 2.
1.15 MHD + 0.1MH

Harbour

MFull
HarbourCargo mass

Cargo mass
0.15(M
0.15
M HD +0.1M H)

Seagoing

01.15MFullM HD+0.1M H
M HD

T HB

0.5M H

0.67 T S

TS

0.15MFull

Seagoing

0Draught(a) Loaded hold

0.67TSTS

Draught(b) Cargo hold which can be empty at the maximum draught

Figure 2: Example of mass curve for BC-A ships having {No MP} assigned

2.1.4

BC-B and BC-C ships not having {No MP} assigned
The maximum permissible mass (Wmax(Ti)) at various draughts (Ti) is obtained, in t, by the following
formulae:

Wmax (Ti )  M Full
Wmax (Ti )  M Full  1.025VH

0.67TS  Ti hforTS  Ti  0.67TS

forTi  0.67TS

The minimum required cargo mass (Wmin(Ti)) at various draughts (Ti) is obtained, in t, by thefollowing formulae:

Wmin (Ti )  0
Wmin (Ti )  1.025VH

Ti  0.83TS hforTi  0.83TSforTS  Ti  0.83TS

Example for mass curve of cargo hold for BC-B and BC-C ships is shown in Fig. 3.

Rule Change Notice No. 2

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Common Structural Rules for Bulk Carriers

Edition of July 2008

1.15MFull
MFull

Cargo mass

Harbour

0.15MFull

Seagoing

00.67TS 0.83TS

TS

Draught

Figure 3: Example of mass curve for BC-B and BC-C ships not having {No MP} assigned

2.1.5

BC-B and BC-C ships with having {No MP} assigned
The maximum permissible mass (Wmax(Ti)) at various draughts ( Ti ) is the same specified in [2.1.4].
The maximum permissible mass (Wmax(Ti)) at various draughts Ti is obtained, in t, by the following
formulae:

Wmax (Ti )  M Full  1.025VH

TS  Ti hThe minimum required cargo mass (Wmin(Ti)) at various draughts (Ti) is obtained, in t, by thefollowing formulae:

Wmin (Ti )  0
Wmin (Ti )  1.025VH

Ti  THB 
hWmin (Ti )  0.5M H  1.025VH

TS  Ti hforTi  THBforTS  Ti  THB orforTS  Ti

Wmin(Ti) ≥ 0.0
Examples for mass curve of cargo hold for BC-B or BC-C ships with {No MP} areis shown in Fig 24.
1.15MFull

1.15MFull

MFull

MFull

0

76 / 97

HarbourCargo mass

Cargo mass

Harbour

Seagoing

0.67TS 0.83TS

TS

Draught

0

Seagoing

THB 0.67TS

TS

Draught

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

1.15MFull
MFull

Cargo mass

Harbour

0.15MFull

Seagoing

0THB

0.67TS

0.5MH

TS

Draught

Figure 2 4: Example of mass curve for BC-B or BC-C ships Example of mass curve for BC-B and
BC-C ships having {No MP} assigned

2.2

Maximum permissible mass and minimum required masses of single cargo hold in
harbour condition

2.2.1

GeneralThe cargo mass curves of single cargo hold in harbour condition are defined in [2.2.2]. However if theship structure is checked for more severe loading conditions than ones considered in Ch 4, Sec 7,[3.7.1], the minimum required cargo mass and the maximum allowable cargo mass can be based on
those corresponding loading conditions.

2.2.2

All ships
The maximum permissible cargo mass and the minimum required cargo mass corresponding to
draught for loading/unloading conditions in harbour may be increased or decreased by 15% of the
maximum permissible mass at the maximum draught for the cargo hold in seagoing condition.
However, maximum permissible mass is in no case to be greater than the maximum permissible cargomass at designed maximum load draught for each cargo hold.

2.2.3

BC-A ship not having {No MP} assigned
The maximum permissible mass (Wmax(Ti)) at various draughts Ti in harbour condition is also to bechecked by the following formulae in addition to the requirements in [2.1.2]:

Wmax (Ti )  M HD

For loaded hold
Wmax Ti   M HD  0.1M H  1.025VH

2.2.4

0.67TS  TihforTi  0.67TS

forTi  0.67T S

BC-A ship having {No MP} assigned
The maximum permissible mass (Wmax(Ti)) at various draughts Ti in harbour condition is also to bechecked by the following formulae in addition to the requirements in [2.1.3]:
For empty hold which can be empty at the maximum draught
Wmax (Ti )  M Full

Wmax (Ti )  M Full  1.025VH

Rule Change Notice No. 2

0.67TS  Ti hforTS  Ti  0.67TS

forTi  0.67TS

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Common Structural Rules for Bulk Carriers

2.2.5

Edition of July 2008

BC-B and BC-C ships having {No MP} assigned
The maximum permissible mass (Wmax(Ti)) at various draughts Ti in harbour condition is also to bechecked by the following formulae in addition to the requirements in [2.2.2]:

Wmax (Ti )  M Full
Wmax (Ti )  M Full  1.025VH

0.67TS  Ti hforTS  Ti  0.67TS

forTi  0.67TS

3

Maximum and minimum masses of cargo of two adjacent holds

3.1

Maximum permissible mass and minimum required masses of two adjacent holds inseagoing condition

3.1.1

GeneralThe cargo mass curves of two adjacent cargo holds in seagoing condition are defined in [3.1.2] and[3.1.3].
However if the ship structure is checked for more severe loading conditions than ones considered in
Ch 4, Sec 7, [3.7.1], the minimum required cargo mass and the maximum allowable cargo mass canbe based on those corresponding loading conditions.

3.1.2

BC-A ships with “Block loading” and not having {No MP} assigned
The maximum permissible cargo mass (Wmax(Ti)) and the minimum required cargo mass (Wmin(Ti)) for
the adjacent two holds at various draughts (Ti) are determined, in t, by the following formulae:
W max (Ti )  2M Full or M HD   0.1M H , whichever is the greaterWmax (Ti )  Wmax (0.67TS )  1.025 V f  Va

 0.67ThS  Ti 

Wmin (Ti )  0

for TS  Ti  0.67TS
for Ti  0.67TS
for Ti  0.75TS



Wmin (Ti )  1.025 V f  Va

 Ti  0h.75TS

for TS  Ti  0.75TS

The maximum permissible mass (Wmax(Ti)) at various draughts (Ti) is obtained, in t, by the greater ofthe following formulae:

 V f Va 
Wmax (Ti )   ( M BLK  0.1M H )  1.025
 (Ts  Ti )
h
ha 
f


or

 V f Va 
Wmax (Ti )   M Full  1.025 (0.67Ts  Ti )
h
ha 
f

However, Wmax(Ti) is no case to be greater than ΣMBLK.
The minimum required cargo mass (Wmin(Ti)) at various draughts (Ti) is obtained, in t, by thefollowing formulae:

78 / 97

Wmin (Ti )  0

forTi  0.75TS

Vf V Wmin (Ti )  1.025  a (Ti  0.75TS )h f ha forTS  Ti  0.75TS

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

3.1.2 bis BC-A ships with “Block loading” and having {No MP} assigned
The maximum permissible mass Wmax(Ti) at various draughts Ti is obtained, in t, by the following
formula: V f Va 
Wmax (Ti )   ( M BLK  0.1M H )  1.025
 (Ts  Ti )h f ha 
However, Wmax(Ti) is no case to be greater than ΣMBLK.
The minimum required cargo mass Wmin(Ti) at various draughts Ti is obtained, in t, by the following
formulae:
Wmin (Ti )  0

forTi  T HB

 V f Va  (Ti  THB )Wmin (Ti )  1.025h
 f ha forTS  Ti  T HB

Examples for mass curve of cargo hold for BC-A with block loading ships are shown in Fig 5.
 (MBLK +0.1MH)
 (MBLK ) (MFull)

0.15  (MBLK +0.1MH)

Seagoing

0

HarbourCargo mass

Cargo mass

Harbour (MBLK +0.1MH)(MBLK )

0.67TSTS

Draught

00.15  (MBLK +0.1MH)

Seagoing

THB

0.75TS(a) without {No MP]

TS

Draught(b) with {No MP}

Figure 5: Example of mass curve for BC-A ships with “Block loading”

3.1.3

BC-B and BC-C ships (void)
The maximum permissible mass (Wmax(Ti)) and the minimum required mass (Wmin(Ti)) at various
draughts (Ti) are obtained, in t, by the following formulae:
Wmax (Ti )  2M Full

Wmax (Ti )  Wmax (0.67TS )  1.025 V f  Va
Wmin (Ti )  0

for Ti  0.67TS
for Ti  0.75TS



Wmin (Ti )  1.025 V f  Va

Rule Change Notice No. 2

 0.67ThS  Ti 

for Ti  0.67TS

 Ti  0h.75TS

for TS  Ti  0.75TS

79 / 97

Common Structural Rules for Bulk Carriers

Edition of July 2008

Figure 3: Example of mass curve for BC-B or BC-C ships(void)

3.1.4

BC-A ships without “Block loading” and BC-B, BC-C ships, not having {No MP} assigned
The maximum permissible mass (Wmax(Ti)) at various draughts Ti is obtained, in t, by the following
formulae:

Wmax (Ti )   M Full
Wmax Ti  M Vf V  a 0.67TS  Ti 
ha 
 hf

Full  1.025

forTS  Ti  0.67TS

forTi  0.67TS

The minimum required cargo mass (Wmin(Ti)) at various draughts Ti is obtained, in t, by the following
formulae:

3.1.5

Wmin (Ti )  0

forTi  0.75TS

 V f Va  Ti  0.75TS 
Wmin Ti   1.025h
 f ha forTS  Ti  0.75TS

BC-A ships without “Block loading” and BC-B, BC-C ships, having {No MP} assigned
The maximum permissible mass (Wmax(Ti)) at various draughts Ti is obtained, in t, by the following
formulae:
Wmax Ti  M Vf V  a TS  Ti 
ha 
 hf

Full  1.025

forTi  TS

The minimum required cargo mass (Wmin(Ti)) at various draughts Ti is obtained, in t, by the following
formulae:

80 / 97

Wmin (Ti )  0

forTi  T HB

 V f Va 
Wmin Ti   1.025
 Ti  THB h f ha forTS  Ti  T HB

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

Examples for mass curve of cargo hold for BC-A without block loading and BC-B or BC-C are shown in Fig 6.
 (1.15MFull)
 (MFull)
HarbourCargo mass

Cargo mass

Harbour (1.15MFull)
 (MFull)

0.15  (MFull )Seagoing

00.67TSTS

Draught

Seagoing
0.15  (MFull )0THB

0.67TSTS

Draught

0.75TS(b) with {No MP}(a) without {No MP]

Figure 6: Example of mass curve for BC A-ship without block loading and BC-B or BC-C ships

3.2

Maximum permissible mass and minimum required masses of two adjacent cargoholds in harbour condition

3.2.1

GeneralThe cargo mass curves of two adjacent cargo holds in harbour condition are defined in [3.2.2].
However if the ship structure is checked for more severe loading conditions than ones considered in
Ch 4, Sec 7, [3.7.1], the minimum required cargo mass and the maximum allowable cargo mass canbe based on those corresponding loading conditions.

3.2.2

All ships
The maximum permissible cargo mass and minimum required cargo mass corresponding to draught
for loading/unloading conditions in harbour may be increased or decreased by 15% of the maximum
permissible mass at the maximum draught for the cargo hold in seagoing condition. However,maximum permissible mass is in no case to be greater than the maximum permissible cargo mass at
designed maximum load draught for each cargo hold.

3.2.3

BC-A ships with “Block loading” and having {No MP} assigned
The maximum permissible mass (Wmax(Ti)) at various draughts Ti in harbour condition is also to bechecked by the following formulae in addition to the requirements in [3.1.2 bis]:
 V f Va  0.67TS  Ti 
Wmax Ti    M Full  1.025
h
ha 
f


Wmax (Ti )   M BLK

3.2.4

BC-A ships without “Block loading” and BC-B, BC-C ships, having {No MP} assigned
The maximum permissible mass (Wmax(Ti)) at various draughts Ti in harbour condition is also to bechecked by the following formulae in addition to the requirements in [3.1.5]:

Wmax (Ti )   M Full

Rule Change Notice No. 2

forTS  Ti  0.67TS

81 / 97

Common Structural Rules for Bulk Carriers

 V f Va  0.67TS  Ti 
Wmax Ti    M Full  1.025h
 f ha 

82 / 97

Edition of July 2008

forTi  0.67TS

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Technical Background For Rule Change NoticeNo. 2-12
Hold Mass Curves
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
The Technical Background For Rule Change Notice should be read in conjunction
with the July 2008 consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

83 / 97

Common Structural Rules for Bulk Carriers

Edition of July 2008

This document gives the technical background of the Rule Change Notice No. 2-12 of the July 2008
edition of the Common Structural Rules for Bulk Carriers.

84 / 97

Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

1

Edition of July 2008

Reason for the Rule Changes
The requirements for hold mass curves in Chapter 4 Appendix 1 came from IACS UR S25.
The current requirements are not specific for a ship with a variety of class notations.
Rule change requests have been raised on KC #515 and #633. This rule change refers to the request on
KC #633 and also corresponds to the one on KC #515.

2

Summary of the Rule Changes
This Rule Change is to revise the requirements corresponding to each class notation.
5) Maximum permissible mass and minimum required mass of single cargo holdMaximum permissible mass and minimum required mass of single cargo hold regulated in Chapter 4
Appendix 1, paragraph 2 are based on following design loading conditions regulated in Chapter 4
Section 7, [3.2] to [3.6], except [3.5.1].
Harbour(1)BC-B andBC-C

Sea going{No MP}not assignedin
Ch4 App1, 2.1.4{No MP}assignedin
Ch4 App1, 2.1.5

Max

Min

Max

Min

Ch4 Sec7, 3.2.1

Ch4 Sec7, 3.2.2-

TS, MFull

TS, MH/2-

Ch4 Sec7, 3.2.3
THB, empty
Ch4 Sec7, 3.3.1

Ch4 Sec7, 3.3.2

67%TS, MFull

83%TS, empty

Ch4 Sec7, 3.2.1

Ch4 Sec7, 3.2.2

Ch4 Sec7, 3.6.1

TS, MFull

TS, MH/2

67%TS, MFull-

Ch4 Sec7, 3.2.3
THB, empty

BC-A(Additional cases)

Cases inHold
addition of
Ch4 Sec7, 3.4.2
Ch4 Sec7, 3.6.1 loaded inthosealternateTS, MHD+0.1MH
67%TS, MHD
definedHoldabove forCh4 Sec7, 3.4.1
empty in
BC-B and
BC-C
alternateTS, empty(1)
Maximum permissible mass and minimum required mass in harbour condition are
generally increased or decreased by 15% of the maximum permissible mass at the
maximum draught in seagoing condition as stipulated in Chapter 4 Appendix 1, 2.2.2 andbased on Chapter 4 Section 7, 3.6.3. The notes for harbour in this table show only theadditional conditions based on Chapter 4 Section 7, 3.6.1.
6) Maximum permissible mass and minimum required mass of two adjacent holds
Maximum permissible mass and minimum required mass of two adjacent holds regulated in Chapter
4 Appendix 1, paragraph 3 are based on following design loading conditions regulated in Chapter 4
Section 7, [3.2] to [3.6], except [3.5.1].

Rule Change Notice No. 2

85 / 97

Common Structural Rules for Bulk Carriers

Edition of July 2008

Harbour (2)Sea going

BC-A with "Blockloading"
in
Ch4 App1, 3.1.2

with{No MP}
without{No MP}

BC-A without"Block loading",
BC-B and BC-Cin
Ch4 App1, 3.1.3

with{No MP}(2)

3

without{No MP}Max
Ch4 Sec7, 3.3.3
Ch4 Sec7, 3.4.3

Min

Max

Min

Ch4 Sec7, 3.3.4--

67%Ts, Σ(Mfull)Ts, Σ(MBLK+0.1MH)

75%TS, empty--

Ch4 Sec7, 3.4.3

Ch4 Sec7, 3.2.3

Ch4 Sec7, 3.6.2-

Ts, Σ(MBLK+0.1MH)

THB, empty

67%TS, Σ(MFull)-

Ch4 Sec7, 3.3.3

Ch4 Sec7, 3.3.4--

67%TS, Σ(MFull)

75%TS, empty--

Ch4 Sec7, 3.2.1

Ch4 Sec7, 3.2.3

Ch4 Sec7, 3.6.2-

TS, Σ(MFull)
THB, empty
67%TS, Σ(MFull)
Maximum permissible mass and minimum required mass in harbour condition are
generally increased or decreased by 15% of the maximum permissible mass at the
maximum draught in seagoing condition as stipulated in Chapter 4 Appendix 1, 3.2.2 andbased on Chapter 4 Section 7, 3.6.3. The notes for harbour in this table show only theadditional conditions based on Chapter 4 Section 7, 3.6.2.

Impact on Scantling
As this rule change is so made for the clarification corresponding to each class notation or simple
correction of typo and scantling check is carried out based on the requirement in Ch 4 Sec 7 which isthe same of IACS UR S25, there is no scantling impact due to this change.

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Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Rule Change Notice No. 2-13
Use of Steel Grades for Hull Members
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
This Rule Change Notice should be read in conjunction with the July 2008
consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

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Common Structural Rules for Bulk Carriers

Edition of July 2008

For technical background for Rule Changes in this present document, reference is made to separate
document Technical Background for Rule Change Notice No. 2-13.

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Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

CHAPTER 3 – STRUCTURAL DESIGN PRINCIPLES

Section 1 – MATERIAL
2.

Hull structural steel

2.3

Grades of Steel

2.3.1
Steel materials in the various strength members are not to be of lower grade than those corresponding
to classes I, II and III, as given in Tab 3 for the material classes and grades given in Tab 4 Tab 4-1,
while additional requirements for ships with length (L) exceeding 150m and 250m, BC-A and BC-B
ships are given in Tab 4-2 to Tab 4-4.,
For strength members not mentioned in Tab 3 in Tab 4-1 to Tab 4-4, grade A/AH may be used.
Table 3: Material grade requirements for classes I, II and III

ClassI
As-built thickness
NSS
HSS
(mm)
t ≤ 15A
AH
15 < t ≤ 20A
AH
20 < t ≤ 25A
AH
25 < t ≤ 30A
AH
30 < t ≤ 35
B
AH
35 < t ≤ 40
B
AH
40 < t ≤ 50
D
DH
Notes : NSS : Normal strength steel
HSS : Higher strength steel

Rule Change Notice No. 2

II

III

NSS

HSS

NSS

HSS

A
A
B
D
D
D
E

AH
AH
AH
DH
DH
DH
EH

A
B
D
D
E
E
E

AH
AH
DH
DH
EH
EH
EH

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Common Structural Rules for Bulk Carriers

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Table 4: Application of material classes and grades (void)

Structural member category

Material class
Within 0.4L Outside 0.4L
amidshipamidship

SECONDARYLongitudinal bulkhead strakes, other than that belonging to the Primary category
Deck Plating exposed to weather, other than that belonging to the Primary or Special
I
category(7)Side plating
PRIMARY
Bottom plating, including keel plate
Strength deck plating, excluding that belonging to the Special category
II
Continuous longitudinal members above strength deck, excluding hatch coamings
Uppermost strake in longitudinal bulkhead
Vertical strake (hatch side girder) and uppermost sloped strake in top wing tank
SPECIAL
Sheer strake at strength deck (1), (6)Stringer plate in strength deck (1), (6)Deck strake at longitudinal bulkhead (6)Strength deck plating at corners of cargo hatch openings in bulk carriers, ore carriers,
combination carriers and other ships with similar hatch openings configuration (2)III
Bilge strake (3), (4), (6)Longitudinal hatch coamings of length greater than 0.15L (5)Lower bracket of side frame of single side bulk carriers having additional service feature
BC-A or BC-B (5)End brackets and deck house transition of longitudinal cargo hatch coamings (5)Notes:(1) Not to be less than grade E/EH within 0.4L amidships in ships with length exceeding 250 m.

A/AH

A/AH

II
(I outside
0.6L
amidships)(2) Not to be less than class III within 0.6L amidships and class II within the remaining length of the cargo region.
(3) May be of class II in ships with a double bottom over the full breadth and with length less than 150 m.
(4) Not to be less than grade D/DH within 0.4L amidships in ships with length exceeding 250 m.
(5) Not to be less than grade D/DH.
(6) Single strakes required to be of class III or of grade E/EH and within 0.4L amidships are to have breadths, in m, notless than 0.8 + 0.05L, need not be greater than 1.8 m, unless limited by the geometry of the ship's design.
(7) For BC-A and BC-B ships with single side skin structures, side shell strakes included totally or partially between thetwo points located to 0.125 above and below the intersection of side shell and bilge hopper sloping plate are not to beless than grade D/DH,  being the frame span.

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Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

Table 4-1: - Material Classes and Grades for ships in general
Structural member category

SECONDARY:
A1Longitudinal bulkhead strakes, otherthan that belonging to the Primarycategory
A2
Deck plating exposed to weather,other than that belonging to thePrimary or Special category
A3
Side plating
PRIMARY:
B1
Bottom plating, including keel plate
B2
Strength deck plating, excluding thatbelonging to the Special category
B3
Continuous longitudinal members
above strength deck, excluding hatchcoamings.
B4
Uppermost strake in longitudinalbulkhead
B5
Vertical strake (hatch side girder) anduppermost sloped strake in top wingtank
SPECIAL:
C1.
Sheer strake at strength deck (1)C2Stringer plate in strength deck (1)C3

Deck strake at longitudinal bulkhead,excluding deck plating in way of
inner-skin bulkhead of double-hull
ships (1)C5

Strength deck plating at corners ofcargo hatch openings
Bilge strake in ships with double
bottom over the full breadth andlength less than 150 m (1)Bilge strake in other ships (1)

C6
C7

C8
C9

Rule Change Notice No. 2

Longitudinal hatch coamings oflength greater than 0.15L
End brackets and deck housetransition of longitudinal cargo hatchcoamings (2)Material class/grade- Class I within 0.4L amidships- Grade A/AH outside 0.4L amidships- Class II within 0.4L amidships- Grade A/AH outside 0.4L amidships- Class III within 0.4L amidships- Class II outside 0.4L amidships- Class I outside 0.6L amidships- Class III within 0.6L amidships- Class II within rest of cargo region- Class II within 0.6L amidships- Class I outside 0.6L amidships- Class III within 0.4L amidships- Class II outside 0.4L amidships- Class I outside 0.6L amidships- Class III within 0.4L amidships- Class II outside 0.4L amidships- Class I outside 0.6L amidships- Not to be less than Grade D/DH

(1)

Single strakes required to be of Class III within 0.4L amidships are to have breadths
not less than 800+5L (mm), and need not be greater than 1800 (mm), unless limitedby the geometry of the ship’s design.

(2)

Applicable to bulk carriers having the longitudinal hatch coaming of length greaterthan 0.15L.

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Table 4-2: Minimum material grades for ships with ship’s length (L) exceeding 150m and single
strength deck
Structural member category
Longitudinal strength members of strength
deck plating
Continuous longitudinal strength members
above strength deckSingle side strakes for ships without innercontinuous longitudinal bulkheads between
bottom and the strength deck

Material Grade
Grade B/AH within 0.4L amidships

Grade B/AH within 0.4L amidships
Grade B/AH within cargo region

Table 4-3: Minimum Material Grades for ships with ship’s length (L) exceeding 250m
Structural member category
Material Grade
Shear strake at strength deck (1)Grade E/EH within 0.4L amidships
Stringer plate in strength deck (1)Grade E/EH within 0.4L amidships
Bilge strake (1)Grade D/DH within 0.4L amidships(1)
Single strakes required to be of Class III within 0.4L amidships are to have breadths
not less than 800 + 5L (mm), and need not be greater than 1800 (mm), unless limitedby the geometry of the ship’s design
Table 4-4: Minimum material grades for BC-A and BC-B ships
Structural member category
Material Grade
Lower bracket of ordinary side frame(1), (2)Grade D/DHSide shell strakes included totally or partially Grade D/DH
between the two points located to 0.125 labove and below the intersection of side shelland bilge hopper sloping plate or inner
bottom plate (2)(1) The term “lower bracket” means webs of lower brackets and webs of the lower part ofside frames up to the point 0.125 l above the intersection of side shell and bilge hopper
sloping plate or inner bottom plate.
(2) The span of the side frame, l, is defined as the distance between the supporting structure(See Ch. 3 Sec 6 Fig.19)

2.3.2
Plating materials for stern frames, rudders, rudder horns and shaft brackets are in general not to be oflower grades than corresponding to class II. For rudder and rudder body plates subjected to stressconcentrations (e.g. in way of lower support of semi-spade rudders or at upper part of spade rudders)class III is to be applied.

2.3.3
Bedplates of seats for propulsion and auxiliary engines inserted in the inner bottom within 0.6L
amidships are to be of class I. In other cases, the steel is to be at least of grade A/AH.

2.3.4
Plating at corners of large hatch openings on decks located below the strength deck, in the case ofhatches of holds for refrigerated cargoes, and insert plates at corners of large openings on side shell
plating are generally to be of class III.
(void)

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Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

Edition of July 2008

2.3.5
The steel grade is to correspond to the as-built thickness.

2.3.6
Steel grades of plates or sections of as-built thickness greater than the limiting thicknesses in Table 3
are considered by the Society on a case by case basis.

2.3.7
In specific cases, such as [2.3.8], with regard to stress distribution along the hull girder, the classes
required within 0.4L amidships may be extended beyond that zone, on a case by case basis.

2.3.8
The material classes required for the strength deck plating, the sheerstrake and the upper strake oflongitudinal bulkheads within 0.4L amidships are to be maintained for an adequate length across thepoop front and at the ends of the bridge, where fitted.

2.3.9
Rolled products used for welded attachments of length greater than 0.15L on outside of hull plating,such as gutter bars, are to be of the same grade as that used for the hull plating in way.

2.3.10In the case of full penetration welded joints located in positions where high local stresses may occur
perpendicular to the continuous plating, the Society may, on a case by case basis, require the use ofrolled products having adequate ductility properties in the through thickness direction, such as toprevent the risk of lamellar tearing (Z type steel).

Rule Change Notice No. 2

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Common Structural Rules for Bulk Carriers

Edition of July 2008

COMMON STRUCTURAL RULES FOR BULK CARRIERSJULY 2008

Technical Background For Rule Change NoticeNo. 2-13
Use of steel grades for hull member
Notes: (1)(2)

These Rule Changes enter into force on 1st July 2010.
The Technical Background For Rule Change Notice should be read in conjunction
with the July 2008 consolidated edition of Bulk Carriers CSR.

Copyright in these Common Structural Rules for Bulk Carriers is owned by:American Bureau of Shipping
Bureau Veritas
China Classification Society
Det Norske Veritas
Germanischer Lloyd
Korean Register of Shipping
Lloyd's Register
Nippon Kaiji Kyokai
Registro Italiano Navale
Russian Maritime Register of Shipping

Copyright © 2006

The IACS members, their affiliates and subsidiaries and their respective officers, employees or agents are,individually and collectively, referred to in this clause as the ‘IACS Members’. The IACS Members, individuallyand collectively, assume no responsibility and shall not be liable to any person for any loss, damage or expensecaused by reliance on the information or advice in this document or howsoever provided, unless that person has
signed a contract with the relevant IACS Member entity for the provision of this information or advice and in thatcase any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Rule Change Notice No. 2

95 / 97

Common Structural Rules for Bulk Carriers

Edition of July 2008

This document gives the technical background of the Rule Change Notice No. 2-13 of the July 2008
edition of the Common Structural Rules for Bulk Carriers.

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Rule Change Notice No. 2

Common Structural Rules for Bulk Carriers

1

Reason for the Rule Changes

1.1

Chapter 3, Section 1, [2.3.1]

Edition of July 2008

KC references: question id 787
The requirement in Ch. 3 Sec. 1 [2.3.1] is based on IACS UR S6 Rev. 4, July 2003. This UR has beenrevised and issued as Rev. 5 in September 2007.
The Rule change is made in order to be in line with IACS UR Rev.5.

1.2

Chapter 3, Section 1, 2.3.4
As no bulk carrier has a large hatch opening on deck located below the strength deck, this requirement
is not applicable to bulk carriers.

1.3

Chapter 3, Section 1, 2.3.9
KC references: question id 617 and 720
The rolled products used for welded attachment on hull plating seem vague, although the example asgutter bars is mentioned in the text. Because rolled products cover all most all members such as
coamings for deck machineries or spill coaming for air pipes, bulwark stay, hatch coaming stay, etc.
and even longitudinals which they are not exposed to the weather fitted to inside of hull plating.
In order to be clear the applicable members, the requirement is revised.

2

Summary of Rule Changes

2.1

Ch 3 Sec 1, [2.3.1]
The requirements in IACS UR S6 Rev.5 applicable to bulk carriers are taken into the CSR.

2.2

Ch 3 Sec 1 [2.3.4]
This paragraph is deleted.

2.3

Ch 3 Sec 1 [2.3.9]
The applicable role products welded attachment is clarified to that with length more than 0.15L andfitted to outside of hull plating.

2.4

Others
The correction is made for the paragraph number and reference due to the deletion of [2.3.4].

3Impact on Scantling
There is no scantling impact due to this change but steel grade is affected.
The steel grade of side shell for single side skin BC and of outer shell of ships with ice strengthening
is enhanced, but as IACS UR S6 Rev. 5 is already implemented by all Class, the effect due to thischange is ignored.

Rule Change Notice No. 2

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