Common Structural Rules for
Bulk Carriers, January 2006

Background Document
CHAPTER 9 – OTHER STRUCTURES

NOTE:- This TB is published to improve the transparency of CSRs and increase theunderstanding of CSRs in the industry.
- The content of the TB is not to be considered as requirements.
- This TB cannot be used to avoid any requirements in CSRs, and in cases
where this TB deviates from the Rules, the Rules have precedence.
- This TB provides the background for the first version (January 2006) of theCSRs, and is not subject to maintenance.

COMMON STRUCTURAL RULES FOR BULK CARRIERS − BACKGROUND DOCUMENT
PAGE 2 – CHAPTER 9: OTHER STRUCTURES© IACS - the International Association of Classification Societies and theInternational Association of Classification Societies Limited
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COMMON STRUCTURAL RULES FOR BULK CARRIERSCOMMON STRUCTURAL RULES FOR BULK CARRIERS − BACKGROUND DOCUMENT
PAGE 3 – CHAPTER 9: OTHER STRUCTURESTABLE OF CONTENTS:
SECTION 1 – FORE PART .................................................................................................................. 7
1.

GENERAL.................................................................................................................................... 7
1.1
1.2

2.

ARRANGEMENT........................................................................................................................ 7
2.1
2.2
2.3

3.

Application............................................................................................................................ 10
Bottom plating....................................................................................................................... 10
Ordinary Stiffeners................................................................................................................ 11
Primary supporting members ............................................................................................... 11

STEM ......................................................................................................................................... 12
6.1
6.2

7.

Bow flare reinforcement .......................................................................................................... 9
Plating ..................................................................................................................................... 9
Ordinary stiffeners .................................................................................................................. 9Primary supporting members ............................................................................................... 10

STRENGTHENING OF FLAT BOTTOM FORWARD AREA .................................................. 10
5.1
5.2
5.3
5.4

6.

Load point ............................................................................................................................... 8
Pressure in bow area ............................................................................................................... 8
Bow flare area pressure ........................................................................................................... 8
Bottom slamming pressure ..................................................................................................... 8

SCANTLINGS ............................................................................................................................. 9
4.1
4.2
4.3
4.4

5.

Structural arrangement principles .......................................................................................... 7
Tripping brackets .................................................................................................................... 7
Floors and bottom girders ....................................................................................................... 7

LOAD MODEL ............................................................................................................................ 8
3.1
3.2
3.3
3.4

4.

Application.............................................................................................................................. 7
Net thicknesses........................................................................................................................ 7

Bar stem................................................................................................................................. 12
Plate stem and bulbous bows ................................................................................................ 12

FORECASTLE............................................................................................................................ 12
7.1

General .................................................................................................................................. 12

SECTION 2 – AFT PART................................................................................................................... 141.

GENERAL.................................................................................................................................. 14
1.1
1.2
1.3

2.

LOAD MODEL .......................................................................................................................... 14
2.1
2.2

3.

Load point ............................................................................................................................. 14
Lateral pressures ................................................................................................................... 14

AFT PEAK.................................................................................................................................. 15
3.1

4.

Introduction........................................................................................................................... 14
Connections of the aft part with structures located fore of the aft peak bulkhead ............... 14
Net scantlings ........................................................................................................................ 14

Arrangement ......................................................................................................................... 15

SCANTLINGS ........................................................................................................................... 15
4.1
4.2
4.3

Side plating............................................................................................................................ 15
Ordinary Stiffeners................................................................................................................ 15
Primary supporting members ............................................................................................... 16

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5.

CONNECTION OF HULL STRUCTURES WITH THE RUDDER HORN ............................... 16
5.1
5.2

6.

Connection of aft peak structures with the rudder horn ....................................................... 16
Structural arrangement above the aft peak ........................................................................... 17

STERNFRAMES ........................................................................................................................ 17
6.1
6.2
6.3
6.4
6.5

General .................................................................................................................................. 17
Connections ........................................................................................................................... 17
Propeller posts ....................................................................................................................... 18
Propeller shaft bossing .......................................................................................................... 18
Sterntubes .............................................................................................................................. 18

SECTION 3 – MACHINERY SPACE................................................................................................. 191.

GENERAL.................................................................................................................................. 19
1.1
1.2
1.3

2.

DOUBLE BOTTOM................................................................................................................... 19
2.1
2.2

3.

Arrangement ......................................................................................................................... 21

MACHINERY CASING............................................................................................................. 22
6.1
6.2
6.3

7.

Arrangement ......................................................................................................................... 21
Minimum thicknesses............................................................................................................ 21

PILLARING ............................................................................................................................... 21
5.1

6.

Arrangement ......................................................................................................................... 20

PLATFORMS ............................................................................................................................. 21
4.1
4.2

5.

Arrangement ......................................................................................................................... 19
Minimum thickness ............................................................................................................... 20

SIDE ........................................................................................................................................... 20
3.1

4.

Application ............................................................................................................................ 19
Scantlings............................................................................................................................... 19
Connections of the machinery space with structures located aft and forward ..................... 19

Arrangement ......................................................................................................................... 22
Openings ............................................................................................................................... 22
Scantlings............................................................................................................................... 22

MAIN MACHINERY SEATING ............................................................................................... 22
7.1
7.2

Arrangement ......................................................................................................................... 22
Minimum scantlings.............................................................................................................. 23

SECTION 4 – SUPERSTRUCTURES AND DECKHOUSES ............................................................ 24
1.

GENERAL.................................................................................................................................. 24
1.1
1.2

2.

ARRANGEMENT...................................................................................................................... 24
2.1
2.2
2.3
2.4

3.

Definitions ............................................................................................................................. 24
Gross scantlings..................................................................................................................... 24
Strengthening at the ends of superstructures ........................................................................ 24
Attachment of stiffening members ........................................................................................ 25
Transverse structure of superstructures and deckhouses ..................................................... 25
Openings in enclosed superstructures................................................................................... 25

LOAD MODEL .......................................................................................................................... 25
3.1
3.2

Load calculation point ........................................................................................................... 25
Loads ..................................................................................................................................... 26

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4.

SCANTLINGS ........................................................................................................................... 26
4.1
4.2
4.3
4.4
4.5

5.

Side plating of non-effective superstructures........................................................................ 26
Deck plating of non-effective superstructures ...................................................................... 26
Deck beams and supporting deck structure.......................................................................... 26
Superstructure frames ........................................................................................................... 27
Decks of short deckhouses .................................................................................................... 27

SUPERSTRUCTURE END BULKHEADS AND DECKHOUSE WALLS ................................. 27
5.1
5.2
5.3

Application............................................................................................................................ 27
Loads ..................................................................................................................................... 27
Scantlings .............................................................................................................................. 27

SECTION 5 – HATCH COVERS ....................................................................................................... 28
1.

GENERAL.................................................................................................................................. 28
1.1
1.2
1.3
1.4
1.5

2.

ARRANGEMENTS.................................................................................................................... 29
2.1
2.2
2.3
2.4

3.

Lateral pressures and forces.................................................................................................. 31
Load point ............................................................................................................................. 31

STRENGTH CHECK ................................................................................................................. 31
5.1
5.2
5.3
5.4
5.5

6.

Ordinary stiffeners ................................................................................................................ 30
Primary supporting members ............................................................................................... 30

LOAD MODEL .......................................................................................................................... 31
4.1
4.2

5.

Height of hatch coamings...................................................................................................... 29
Hatch covers.......................................................................................................................... 29
Hatch coamings..................................................................................................................... 29
Small hatchways.................................................................................................................... 30

WIDTH OF ATTACHED PLATING ......................................................................................... 30
3.1
3.2

4.

Application............................................................................................................................ 28
Materials................................................................................................................................ 28
Net scantlings ........................................................................................................................ 28
Corrosion additions............................................................................................................... 28
Allowable stresses ................................................................................................................. 28

General .................................................................................................................................. 31
Plating ................................................................................................................................... 32
Ordinary stiffeners ................................................................................................................ 32
Primary supporting members ............................................................................................... 33
Ordinary stiffeners and primary supporting members of variable cross-section ................. 33

HATCH COAMINGS................................................................................................................ 33
6.1
6.2
6.3

Stiffening ............................................................................................................................... 33
Load model ........................................................................................................................... 34
Scantlings .............................................................................................................................. 34

7. WEATHERTIGHTNESS, CLOSING ARRANGEMENT, SECURING DEVICES AND
STOPPERS......................................................................................................................................... 35
7.1
7.2
7.3
7.4
7.5
7.6

Weathertightness................................................................................................................... 35
Gaskets .................................................................................................................................. 35
Closing arrangement, securing devices and stoppers ........................................................... 36
Tarpaulins ............................................................................................................................. 36
Cleats..................................................................................................................................... 36
Wedges .................................................................................................................................. 37

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8.

DRAINAGE ............................................................................................................................... 37
8.1

9.

Arrangement ......................................................................................................................... 37

SMALL HATCHES FITTED ON THE EXPOSED FORE DECK ............................................... 37
9.1
9.2
9.3
9.4
9.5

Application ............................................................................................................................ 37
Strength ................................................................................................................................. 38
Weathertightness ................................................................................................................... 38
Primary securing devices ...................................................................................................... 38
Secondary securing devices................................................................................................... 39

SECTION 6 – ARRANGEMENT OF HULL AND SUPERSTRUCTURE OPENINGS ..................... 40
1.

GENERAL.................................................................................................................................. 40
1.1
1.2

2.

EXTERNAL OPENINGS............................................................................................................ 40
2.1
2.2

3.

General .................................................................................................................................. 48
Scantlings............................................................................................................................... 48
Closing devices ...................................................................................................................... 48

VENTILATORS ......................................................................................................................... 48
8.1
8.2

9.

Engine room skylights........................................................................................................... 47
Closing devices ...................................................................................................................... 47
Coamings............................................................................................................................... 47

COMPANIONWAY................................................................................................................... 48
7.1
7.2
7.3

8.

General provisions................................................................................................................. 45
Freeing port area in a well not adjacent to a trunk or hatchways.......................................... 45
Freeing port area in a well contiguous to a trunk or hatchways ........................................... 46
Freeing port area in an open space within superstructures................................................... 46
Freeing port area in bulwarks of the freeboard deck for ships of types B-100 and B-60 ....... 46

MACHINERY SPACE OPENINGS ........................................................................................... 47
6.1
6.2
6.3

7.

Arrangement of discharges ................................................................................................... 44
Arrangement of garbage chutes ............................................................................................ 44
Scantling of garbage chutes ................................................................................................... 44

FREEING PORTS ...................................................................................................................... 45
5.1
5.2
5.3
5.4
5.5

6.

General .................................................................................................................................. 41
Opening arrangement............................................................................................................ 42
Glasses ................................................................................................................................... 42
Deadlight arrangement.......................................................................................................... 43

DISCHARGES ........................................................................................................................... 44
4.1
4.2
4.3

5.

General .................................................................................................................................. 40
Gangway, cargo and coaling ports ........................................................................................ 41

SIDE SCUTTLES, WINDOWS AND SKYLIGHTS .................................................................. 41
3.1
3.2
3.3
3.4

4.

Application ............................................................................................................................ 40
Definitions ............................................................................................................................. 40

Closing appliances................................................................................................................. 48
Coamings............................................................................................................................... 49

TANK CLEANING OPENINGS ............................................................................................... 50
9.1

General .................................................................................................................................. 50

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PAGE 7 – CHAPTER 9: OTHER STRUCTURESSECTION 1 – FORE PART
1. GENERAL
1.1

Application

1.1.1
1.1.1.a

1.2

The requirements applicable to the forward part defined in 2.1.2 Section 1,
Chapter 1 are specified as applicable regulations.

Net thicknesses

1.2.1
1.2.1.a

The applicability of net scantling approach to structural members of the forward
part has been clarified.

2. ARRANGEMENT
2.1

Structural arrangement principles

2.1.1

General2.1.1.aThis sub-section is set as regulations related to the continuity of structures in theforward part from cargo hold structures, referring to the regulations of various
classification societies.

2.1.2

Structures in tanks

2.1.2.aThis sub-section is set as regulations related to the continuity of structures in theforward part from cargo hold structures, referring to the regulations of various
classification societies.

2.2

Tripping brackets

2.2.1
2.2.1.a

2.3

The requirements of hold frames in the forward-most part of the cargo holdaccording to IACS UR S12 were adopted for the forward part in a transverse
framing system.

Floors and bottom girders

2.3.1
2.3.1.a

The regulations related to transverse framing system are according to GL Rules. The
same regulations as for the transverse arrangement of cargo compartments wereused for the longitudinal framing system.

2.3.2

Solid floors

2.3.2.a

The regulations related to transverse framing system are according to GL Rules. The
same regulations as for the transverse arrangement of cargo compartments wereused for the longitudinal framing system.
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2.3.3

Bottom girders

2.3.3.a

The regulations related to transverse framing system are according to GL Rules. The
same regulations as for the transverse arrangement of cargo compartments wereused for the longitudinal framing system.

3. LOAD MODEL
3.1

Load point

3.1.1
3.1.1.aSince all load assessment points are common to local strength assessment, therelevant regulations of Section 1 and Section 2 of Chapter 6 are referred to.

3.2

Pressure in bow area

3.2.1

Lateral pressure in intact conditions

3.2.1.a

The loads to be considered are specified in 3.2.1 to 3.2.4. The basic concepts
considered related to loads are static loads, wave loads corresponding to 4 loadcases, and hydrostatic test loads; the damaged condition is not considered. For
assessment of loads on outer plating, loads from pressure from internal
compartments and from external pressure acting simultaneously are considered,similar to the loads on ballast tanks from internal compartments.

3.2.2

Lateral pressure in testing conditions

3.2.2.a

The loads to be considered are specified.

3.2.3

Elements of the outer shell

3.2.3.a

The loads to be considered are specified.

3.2.4

Elements other than those of the outer shell

3.2.4.a

The loads to be considered are specified.

3.3

Bow flare area pressure

3.3.1
3.3.1.a

3.4

Regulations related to loads (external pressure) are summarized in Section 5,
Chapter 4. These regulations were referred to when setting regulations for bow
pressure in the flare area. The internal pressure is not considered when calculating
scantlings using pressure in the flare area specified in 4.1.1 Section 5, Chapter 4.

Bottom slamming pressure

3.4.1
3.4.1.aRegulations related to loads (external pressure) are summarized in Section 5,
Chapter 4. These regulations were referred to when setting regulations for bottom
slamming pressure. The internal pressure is not considered when calculating
scantlings using the design bottom slamming pressure specified in 4.2.1, Section 5,
Chapter 4.
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4. SCANTLINGS
4.1

Bow flare reinforcement

4.1.1
4.1.1.a

4.2

Based on GL Rules, the regulation for the bow flare part applies to the structure
located forward of 0.9L from the stern and above the normal ballast waterline.

Plating

4.2.1
4.2.1.a

The minimum plating thickness of the bow compartment was made the same as theminimum plating thickness used in cargo compartments. The formula for
calculating the required plating thickness is the same as the formula for calculating
the plating thickness in the cargo compartments. However, since the stress due tovertical bending moment is small, the parameter related to axial load and safetymargin was fixed at 0.9 so that the required plating thickness can be calculated
easily.

4.3

Ordinary stiffeners

4.3.1

General4.3.1.aBasically, the regulation for stiffeners was taken as the same as the regulation forminimum plating thickness of web used in cargo compartments and the required
scantling regulation. Similar to the treatment of required plating thickness
mentioned above, the parameter related to axial load and safety margin was fixed at
0.9 for the stress due to vertical bending moment.

4.3.2
4.3.2.aBasically, the regulation for stiffeners was taken as the same as the regulation forminimum plating thickness of web used in cargo compartments and the required
scantling regulation. Similar to the treatment of required plating thickness
mentioned above, the parameter related to axial load and safety margin was fixed at
0.9 for the stress due to vertical bending moment.

4.3.3
4.3.3.aBasically, the regulation for stiffeners was taken as the same as the regulation forminimum plating thickness of web used in cargo compartments and the required
scantling regulation. Similar to the treatment of required plating thickness
mentioned above, the parameter related to axial load and safety margin was fixed at
0.9 for the stress due to vertical bending moment.

4.3.4
4.3.4.aBasically, the regulation for stiffeners was taken as the same as the regulation forminimum plating thickness of web used in cargo compartments and the required
scantling regulation. Similar to the treatment of required plating thickness
mentioned above, the parameter related to axial load and safety margin was fixed at
0.9 for the stress due to vertical bending moment.

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4.3.5
4.3.5.aRegulations for multi-spans are the same as in 3.5, Section 2, Chapter 6.

4.4

Primary supporting members

4.4.1

Minimum thickness

4.4.1.a

The regulation for minimum plating thickness of primary supporting members incargo compartments namely 0.6 L was corrected to 0.7 L considering actual
measurements.

4.4.2

Side transverses

4.4.2.a

Only bending strength and shear strength were considered for estimating therequired scantlings of primary supporting members. The scantling formula ofprimary supporting members are the same as those for ordinary stiffeners.

4.4.3

Side girders

4.4.3.a

Only bending strength and shear strength were considered for estimating therequired scantlings of primary supporting members. The scantling formula ofprimary supporting members are the same as those for ordinary stiffeners.

4.4.4

Deck primary supporting members

4.4.4.aRegulation for deck primary supporting members are the same as in Section 4,
Chapter 6.

5. STRENGTHENING OF FLAT BOTTOM FORWARD AREA
5.1

Application

5.1.1
5.1.1.a

5.2

The requirement for strengthening forward bottom area, 0.2V L , is base on NK
Rules. The strengthening range in the vertical direction is based on the GL Rules.

Bottom plating

5.2.1
5.2.1.a

The plating thickness formula was set after considering the damage results;
therefore, the yield strength of the material and the axial load were not consideredin the general formula for required plating thickness. Moreover, in ships where
additional stiffeners (intermediate stiffeners) are installed in the spacing between
ordinary stiffeners, the stiffener spacing is halved, the slamming load is also halved,
and sometimes the damage cannot be explained. Thus, an overdesign factor
associated with the area of the loading considered is introduced after considering
the stiffener formula also.

5.2.2
5.2.2.a

It is considered that for this topic, no information in addition to that shown in theRules is necessary to explain the background.
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5.3

Ordinary Stiffeners

5.3.1
5.3.1.aFor normal loads, the requirements for stiffeners were based on elastic design.
However, considering the applicable slamming loads and measures against damage(refer to Fig. 9.1), the plastic moment was used.
P late
3.00
A1

2.50

A2
A4
A5

2.00
R ation

A7
A8

1.50

A3
A6
A9

1.00

A 10
A 11
A 13

0.50

A 14
A 15

0.00
0.75

0.8

0.85
0.9
0.95
P osition (1=FP )

1

1.05

Stiffener
4.50
4.00
3.50
3.00
2.50
2.00
1.50
1.00
0.50
0.00

R atio

A1
A2
A3
A4
A5
A6
A7
A8
A9
A 10
A 11
A 12
A 13
A 14
A 15

0.75

0.8

0.85
0.9
0.95
P osition(1=FP )

1

1.05

Fig. 9.1 Comparison of damage data and required values
5.3.1.b

In Fig. 9.1, the horizontal axis gives the position along the length of the ship, whilethe vertical axis shows the ratio of required scantling to actual scantling. The large
marks in the same figure indicate damage data.

5.3.1.c

From the figure, it can be seen that except for a part near the FP, damaged locations
fall in a range that requires strengthening.

5.3.2
5.3.2.a

5.4

Primary supporting members

5.4.1

Girders

5.4.1.aRegulations related to shear buckling and compressive buckling of webs and shear
strength when girders are treated as beams are based on NK Rules.

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5.4.2

Floors

5.4.2.aRegulations related to shear buckling and compressive buckling of webs and shear
strength when girders are treated as beams are based on NK Rules.

6. STEM
6.1

Bar stem

6.1.1
6.1.1.aThis regulation is based on the regulations B1.1of Section 13, Chapter I-1-1 of the GL
Rules. Note that this regulation relates to gross scantlings.

6.1.2
6.1.2.a

6.2

This regulation is based on the regulations B1.2 of Section 13, Chapter I-1-1 of the
GL Rules. Note that this regulation relates to gross scantlings.

Plate stem and bulbous bows

6.2.1
6.2.1.aThis regulation is based on the regulations B2.1 of Section 13, Chapter I-1-2 of the
GL Rules. The maximum plating thickness in GL Rules is taken as 25 k . Although
no problem arises if the thickness is smaller than this value, the plating thickness
was taken as 22 k to arrive at a practically feasible numeric value. Note that thisregulation relates to gross scantlings.

6.2.2
6.2.2.aThis regulation is based on the regulations B2.2 of Section 13, Chapter I-1-2 of the
GL Rules.

6.2.3
6.2.3.aThis regulation is based on the regulations B2.3 of Section 13, Chapter I-1-2 of the
GL Rules.

7. FORECASTLE
7.1

General

7.1.1
7.1.1.aThis regulation is in accordance with IACS UR S28.

7.1.2
7.1.2.aThis regulation is in accordance with IACS UR S28.

7.1.3
7.1.3.aThis regulation is in accordance with IACS UR S28.

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7.1.4
7.1.4.aThis regulation is in accordance with IACS UR S28.

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PAGE 14 – CHAPTER 9: OTHER STRUCTURESSECTION 2 – AFT PART
1. GENERAL
1.1

Introduction

1.1.1
1.1.1.aThis regulation is based on 1.1.1, Section 2, Chapter 9, Part B of the RINA Rules.

1.1.2
1.1.2.aThis regulation is based on 1.1.2, Section 2, Chapter 9, Part B of the RINA Rules.
This regulation is for the structure in the aft part. Structural members other thanouter plating that form the boundaries of compartment in which liquid is not
carried, are based on the design concept of scantlings considering pressure whenflooded.

1.2

Connections of the aft part with structures located fore of the aft peakbulkhead

1.2.1

Tapering

1.2.1.aThis regulation is based on 1.2.1, Section 9, Chapter 2, Part B of the RINA Rules.

1.3

Net scantlings

1.3.1
1.3.1.aThis regulation is based on 1.3.1, Section 2, Chapter 9, Part B of the RINA Rules.

2. LOAD MODEL
2.1

Load point

2.1.1
2.1.1.a

These regulations are based on 2.2 and 2.3 of Sec. 2, Chapter 9, Part B of the RINA
Rules, and are the same as the regulations of Sections 1 and 2 of Chapter 6.

2.2

Lateral pressures

2.2.1

Lateral pressure in intact conditions

2.2.1.a

These regulations are based on 2.2 and 2.3 of Sec. 2, Chapter 9, Part B of the RINA
Rules, and are the same as the regulations of Sections 1 and 2 of Chapter 6.

2.2.2

Lateral pressure in testing conditions

2.2.2.a

These regulations are based on 2.2 and 2.3 of Sec. 2, Chapter 9, Part B of the RINA
Rules, and are the same as the regulations of Sections 1 and 2 of Chapter 6.

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2.2.3

Elements of the outer shell

2.2.3.a

These regulations are based on 2.2 and 2.3 of Sec. 2, Chapter 9, Part B of the RINA
Rules, and are the same as the regulations of Sections 1 and 2 of Chapter 6.

2.2.4

Elements other than those of the outer shell

2.2.4.a

These regulations are based on 2.2 and 2.3 of Sec. 2, Chapter 9, Part B of the RINA
Rules, and are the same as the regulations of Sections 1 and 2 of Chapter 6.

3. AFT PEAK
3.1

Arrangement

3.1.1

General3.1.1.a

These regulations are based on the regulations of 3.1, Section 2, Chapter 9, Part B of
the RINA Rules.

3.1.2

Floors

3.1.2.a

These regulations are based on the regulations of 3.1, Section 2, Chapter 9, Part B of
the RINA Rules.

3.1.3

Side frames

3.1.3.a

These regulations are based on the regulations of 3.1, Section 2, Chapter 9, Part B of
the RINA Rules.

3.1.4

Platforms and side girders

3.1.4.a

These regulations are based on the regulations of 3.1, Section 2, Chapter 9, Part B of
the RINA Rules.

3.1.5

Longitudinal bulkheads

3.1.5.a

These regulations are based on the regulations of 3.1, Section 2, Chapter 9, Part B of
the RINA Rules.

4. SCANTLINGS
4.1

Side plating

4.1.1
4.1.1.a

The minimum scantling was adjusted to match the required scantling of thestructures in the cargo compartments. Similar to the bow part, the required net
plating thickness was taken as the formula used in the aft part for loads specified in
Chapter 4, taking the factor associated with the axial load and safety margin as 0.9.

4.2

Ordinary Stiffeners

4.2.1

General4.2.1.a

The regulation is the same as the regulation in the forward part.

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4.2.2
4.2.2.a

The regulation is the same as the regulation in the forward part.

4.2.3
4.2.3.a

The regulation is the same as the regulation in the forward part.

4.2.4
4.2.4.a

The regulation is the same as the regulation in the forward part.

4.2.5
4.2.5.a

The regulation is the same as the regulation in the forward part.

4.3

Primary supporting members

4.3.1

Floors

4.3.1.a

The regulation is the same as the regulation in the forward part.

4.3.2

Side transverses

4.3.2.a

The regulation is the same as the regulation in the forward part.

4.3.3

Side girders

4.3.3.a

The regulation is the same as the regulation in the forward part.

4.3.4

Deck primary supporting members

4.3.4.a

The regulation is the same as the regulation in the forward part.

5. CONNECTION OF HULL STRUCTURES WITH THE RUDDER HORN
5.1

Connection of aft peak structures with the rudder horn

5.1.1

General5.1.1.aThis regulation is based on the regulations of 5.1 and 5.2, Section 2, Chapter 9, Part
B, of the RINA Rules.

5.1.2

Rudder horn

5.1.2.aThis regulation is based on the regulations of 5.1 and 5.2, Section 2, Chapter 9, Part
B, of the RINA Rules.

5.1.3

Hull structures

5.1.3.aThis regulation is based on the regulations of 5.1 and 5.2, Section 2, Chapter 9, Part
B, of the RINA Rules.

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5.2

Structural arrangement above the aft peak

5.2.1

Side transverses

5.2.1.aThis regulation is based on the regulations of 5.1 and 5.2, Section 2, Chapter 9, Part
B, of the RINA Rules.

5.2.2

Side girders

5.2.2.aThis regulation is based on the regulations of 5.1 and 5.2, Section 2, Chapter 9, Part
B, of the RINA Rules.

6. STERNFRAMES
6.1

General

6.1.1
6.1.1.aThis regulation is based on the regulations of 6.1, 6.2, 6.3, 6.5 and 6.7, Section 2,
Chapter 9, Part B of the RINA Rules.

6.1.1.b

The plating thickness in the regulations is the net plating thickness.

6.1.2
6.1.2.aThis regulation is based on the regulations of 6.1, 6.2, 6.3, 6.5 and 6.7, Section 2,
Chapter 9, Part B of the RINA Rules.

6.2

Connections

6.2.1

Connection with hull structure

6.2.1.aThis regulation is based on the regulations of 6.1, 6.2, 6.3, 6.5 and 6.7, Section 2,
Chapter 9, Part B of the RINA Rules assuming the material factor k = 1 to simplify
the formula in a conservative way.

6.2.2

Connection with the keel

6.2.2.aThis regulation is based on the regulations of 6.1, 6.2, 6.3, 6.5 and 6.7, Section 2,
Chapter 9, Part B of the RINA Rules.

6.2.3

Connection with transom floors

6.2.3.aThis regulation is based on the regulations of 6.1, 6.2, 6.3, 6.5 and 6.7, Section 2,
Chapter 9, Part B of the RINA Rules assuming the material factor k = 1 to simplify
the formula in a conservative way.

6.2.4

Connection with centre keelson

6.2.4.aThis regulation is based on the regulations of 6.1, 6.2, 6.3, 6.5 and 6.7, Section 2,
Chapter 9, Part B of the RINA Rules.

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6.3

Propeller posts

6.3.1

Gross scantlings

6.3.1.aThis regulation is based on the regulations of 6.1, 6.2, 6.3, 6.5 and 6.7, Section 2,
Chapter 9, Part B of the RINA Rules.

6.3.2

Gross scantlings of propeller posts

6.3.2.aThis regulation is based on the regulations of 6.1, 6.2, 6.3, 6.5 and 6.7, Section 2,
Chapter 9, Part B of the RINA Rules.

6.3.3

Section modulus below the propeller shaft bossing

6.3.3.aThis regulation is based on the regulations of 6.1, 6.2, 6.3, 6.5 and 6.7, Section 2,
Chapter 9, Part B of the RINA Rules.

6.3.4

Welding of fabricated propeller post with the propeller shaft bossing

6.3.4.aThis regulation is based on the regulations of 6.1, 6.2, 6.3, 6.5 and 6.7, Section 2,
Chapter 9, Part B of the RINA Rules.

6.4

Propeller shaft bossing

6.4.1
6.4.1.aThis regulation is based on the regulations of 6.1, 6.2, 6.3, 6.5 and 6.7, Section 2,
Chapter 9, Part B of the RINA Rules.

6.5

Sterntubes

6.5.1

Sterntubes

6.5.1.aThis regulation is based on the regulations of 6.1, 6.2, 6.3, 6.5 and 6.7, Section 2,
Chapter 9, Part B of the RINA Rules.

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PAGE 19 – CHAPTER 9: OTHER STRUCTURESSECTION 3 – MACHINERY SPACE
1. GENERAL
1.1

Application

1.1.1
1.1.1.aThis regulation is based on the regulations of 1.1 and 1.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

1.2

Scantlings

1.2.1

Net scantlings

1.2.1.aThis regulation is based on the regulations of 1.1 and 1.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

1.2.2

General1.2.2.aThis regulation is based on the regulations of 1.1 and 1.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

1.2.3

Primary supporting members

1.2.3.aThis regulation is based on the regulations of 1.1 and 1.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

1.3

Connections of the machinery space with structures located aft and forward

1.3.1

Tapering

1.3.1.aThis regulation is based on the regulations of 1.1 and 1.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

1.3.2

Transition zone between engine room and cargo area

1.3.2.aThis regulation is based on the regulations of 1.1 and 1.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

1.3.3

Deck discontinuities

1.3.3.aThis regulation is based on the regulations of 1.1 and 1.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

2. DOUBLE BOTTOM
2.1

Arrangement

2.1.1

General2.1.1.aThis regulation is based on the regulations of 2.1.1 and 2.1.7, Section 3, Chapter 9,Part B, of the RINA Rules.

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2.1.2

Double bottom height

2.1.2.aThis regulation is based on the regulations of 2.1.1 and 2.1.7, Section 3, Chapter 9,Part B, of the RINA Rules.

2.1.3

Centre bottom girder

2.1.3.aThis regulation is based on the regulations of 2.1.1 and 2.1.7, Section 3, Chapter 9,Part B, of the RINA Rules.

2.1.4

Side bottom girders

2.1.4.aThis regulation is based on the regulations of 2.1.1 and 2.1.7, Section 3, Chapter 9,Part B, of the RINA Rules.

2.1.5

Side bottom girders in way of machinery seatings

2.1.5.aThis regulation is based on the regulations of 2.1.1 and 2.1.7, Section 3, Chapter 9,Part B, of the RINA Rules.

2.1.6

Floors in longitudinally framed double bottom

2.1.6.aThis regulation is based on the regulations of 2.1.1 and 2.1.7, Section 3, Chapter 9,Part B, of the RINA Rules.

2.1.7

Floors in transversely framed double bottom

2.1.7.aThis regulation is based on the regulations of 2.1.1 and 2.1.7, Section 3, Chapter 9,Part B, of the RINA Rules.

2.1.8

Floors stiffeners

2.1.8.aThis regulation is based on the regulations of 2.1.1 and 2.1.7, Section 3, Chapter 9,Part B, of the RINA Rules.

2.1.9

Manholes and wells

2.1.9.aThis regulation is based on the regulations of 2.1.1 and 2.1.7, Section 3, Chapter 9,Part B, of the RINA Rules.

2.2

Minimum thickness

2.2.1
2.2.1.aThis regulation is the same as the regulations in 2.2.1, Sec. 3, Chapter 9, Part B of the
RINA Rules without the use of the material factor.

3. SIDE
3.1

Arrangement

3.1.1

General3.1.1.aThis regulation is based on the regulations of 4.1.1 and 4.1.3, Section 3, Chapter 9,Part B, of the RINA Rules.

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3.1.2

Extension of the hull longitudinal structure within the machinery space

3.1.2.aThis regulation is based on the regulations of 4.1.1 and 4.1.3, Section 3, Chapter 9,Part B, of the RINA Rules.

3.1.3

Side transverses

3.1.3.aThis regulation is based on the regulations of 4.1.1 and 4.1.3, Section 3, Chapter 9,Part B, of the RINA Rules.

4. PLATFORMS
4.1

Arrangement

4.1.1

General4.1.1.aThis regulation is based on the regulations of 5.1.1, Section 3, Chapter 9, Part B, of
the RINA Rules. The net scantlings indicated by the L function in the RINA Rules
are corrected based on the actual values.

4.1.2

Platform transverses

4.1.2.aThis regulation is based on the regulations of 5.1.2, Section 3, Chapter 9, Part B, of
the RINA Rules. The net scantlings indicated by the L function in the RINA Rules
were corrected based on the actual values.

4.2

Minimum thicknesses

4.2.1
4.2.1.aThis regulation is based on the regulations of 5.1.2, Section 3, Chapter 9, Part B, of
the RINA Rules.

5. PILLARING
5.1

Arrangement

5.1.1

General5.1.1.aThis regulation is based on the regulations of 6.1.1 and 6.1.3, Section 3, Chapter 9,Part B, of the RINA Rules.

5.1.2

Pillars

5.1.2.aThis regulation is based on the regulations of 6.1.1 and 6.1.3, Section 3, Chapter 9,Part B, of the RINA Rules.

5.1.3

Pillar bulkheads

5.1.3.aThis regulation is based on the regulations of 6.1.1 and 6.1.3, Section 3, Chapter 9,Part B, of the RINA Rules.

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6. MACHINERY CASING
6.1

Arrangement

6.1.1

Ordinary stiffener spacing

6.1.1.aThis regulation is based on the regulations of 7.1 and 7.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

6.2

Openings

6.2.1

General6.2.1.aThis regulation is based on the regulations of 7.1 and 7.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

6.2.2

Access doors

6.2.2.aThis regulation is based on the regulations of 7.1 and 7.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

6.3

Scantlings

6.3.1

Plating and ordinary stiffeners

6.3.1.aThis regulation is based on the regulations of 7.1 and 7.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

6.3.2

Minimum thicknesses

6.3.2.aThis regulation is based on the regulations of 7.1 and 7.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

7. MAIN MACHINERY SEATING
7.1

Arrangement

7.1.1

General7.1.1.aThis regulation is based on the regulations of 8.1 and 8.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

7.1.2

Seating supporting structure

7.1.2.aThis regulation is based on the regulations of 8.1 and 8.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

7.1.3

Seatings included in the double bottom structure

7.1.3.aThis regulation is based on the regulations of 8.1 and 8.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

7.1.4

Seatings above the double bottom plating

7.1.4.aThis regulation is based on the regulations of 8.1 and 8.3, Section 3, Chapter 9, Part
B, of the RINA Rules.
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7.1.5

Seatings in a single bottom structure

7.1.5.aThis regulation is based on the regulations of 8.1 and 8.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

7.1.6

Number of girders in way of machinery seatings

7.1.6.aThis regulation is based on the regulations of 8.1 and 8.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

7.2

Minimum scantlings

7.2.1
7.2.1.aThis regulation is based on the regulations of 8.1 and 8.3, Section 3, Chapter 9, Part
B, of the RINA Rules.

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PAGE 24 – CHAPTER 9: OTHER STRUCTURESSECTION 4 – SUPERSTRUCTURES AND DECKHOUSES
1. GENERAL
1.1

Definitions

1.1.1

Superstructure

1.1.1.aThis regulation is based on the regulations of A1.1 to A1.6 and A1.8 of Section 16,
Chapter I-1-1 of the GL Rules.

1.1.2

Deckhouse

1.1.2.aThis regulation is based on the regulations of A1.1 to A1.6 and A1.8 of Section 16,
Chapter I-1-1 of the GL Rules.

1.1.3

Long deckhouse

1.1.3.aThis regulation is based on the regulations of A1.1 to A1.6 and A1.8 of Section 16,
Chapter I-1-1 of the GL Rules.

1.1.4

Short deckhouse

1.1.4.aThis regulation is based on the regulations of A1.1 to A1.6 and A1.8 of Section 16,
Chapter I-1-1 of the GL Rules.

1.1.5

Non-effective superstructure

1.1.5.aThis regulation is based on the regulations of A1.1 to A1.6 and A1.8 of Section 16,
Chapter I-1-1 of the GL Rules.

1.1.6

Insulated funnel

1.1.6.aThis regulation is based on the regulations of A1.1 to A1.6 and A1.8 of Section 16,
Chapter I-1-1 of the GL Rules.

1.2

Gross scantlings

1.2.1
1.2.1.a

All the regulations related to superstructures are expressed by gross scantlings
because the LL Convention using corrosion addition based on a concept different
from that of Section 3, Chapter 3, and the regulation based on IACS UR are
combined.

2. ARRANGEMENT
2.1

Strengthening at the ends of superstructures

2.1.1
2.1.1.aThis regulation is based on the regulation of A3, A4, B3, A5 of Sec. 16, Chapter I-1-1of the GL Rules, and on Rule 12(1) and (2) of the LL Convention.

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2.1.2
2.1.2.aThis regulation is based on the regulation of A3, A4, B3, A5 of Sec. 16, Chapter I-1-1of the GL Rules, and on Rule 12(1) and (2) of the LL Convention.

2.2

Attachment of stiffening members

2.2.1

Attachment of deck beams

2.2.1.aThis regulation is based on the regulation of A3, A4, B3, A5 of Sec. 16, Chapter I-1-1of the GL Rules, and on Rule 12(1) and (2) of the LL Convention.

2.2.2

Attachment of deck girders and transverses

2.2.2.aThis regulation is based on the regulation of A3, A4, B3, A5 of Sec. 16, Chapter I-1-1of the GL Rules, and on Rule 12(1) and (2) of the LL Convention.

2.2.3

End attachment of superstructure frames

2.2.3.aThis regulation is based on the regulation of A3, A4, B3, A5 of Sec. 16, Chapter I-1-1of the GL Rules, and on Rule 12(1) and (2) of the LL Convention.

2.3

Transverse structure of superstructures and deckhouses

2.3.1
2.3.1.a

2.4

This regulation is based on the regulation of A3, A4, B3, A5 of Sec. 16, Chapter I-1-1of the GL Rules, and on Rule 12(1) and (2) of the LL Convention.

Openings in enclosed superstructures

2.4.1
2.4.1.aThis regulation is based on the regulation of A3, A4, B3, A5 of Sec. 16, Chapter I-1-1of the GL Rules, and on Rule 12(1) and (2) of the LL Convention.

2.4.2
2.4.2.aThis regulation is based on the regulation of A3, A4, B3, A5 of Sec. 16, Chapter I-1-1of the GL Rules, and on Rule 12(1) and (2) of the LL Convention.

2.4.3
2.4.3.aThis regulation is based on the regulation of A3, A4, B3, A5 of Sec. 16, Chapter I-1-1of the GL Rules, and on Rule 12(1) and (2) of the LL Convention.

3. LOAD MODEL
3.1

Load calculation point

3.1.1
3.1.1.aThis regulation is specified to maintain consistency with the regulations of Section 1
and 2, Chapter 9, and Section 1 and 2 of Chapter 6.

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3.2

Loads

3.2.1

Lateral pressure for decks

3.2.1.aThis regulation is specified to maintain consistency with the regulations of Section 1
and 2, Chapter 9, and Section 1 and 2 of Chapter 6.

3.2.2

Lateral pressure for exposed wheel house top

3.2.2.aThis regulation is specified to maintain consistency with the regulations of Section 1
and 2, Chapter 9, and Section 1 and 2 of Chapter 6.

3.2.3

Lateral pressure for sides of superstructures

3.2.3.aThis regulation is specified to maintain consistency with the regulations of Section 1
and 2, Chapter 9, and Section 1 and 2 of Chapter 6.

4. SCANTLINGS
4.1

Side plating of non-effective superstructures

4.1.1
4.1.1.a

4.2

This regulation is based on B1, B2, B3, D1 and D2 of Sec. 16, Chapter I-1-1 of the GL
Rules.

Deck plating of non-effective superstructures

4.2.1
4.2.1.aThis regulation is based on B1, B2, B3, D1 and D2 of Sec. 16, Chapter I-1-1 of the GL
Rules.

4.2.2
4.2.2.aThis regulation is based on B1, B2, B3, D1 and D2 of Sec. 16, Chapter I-1-1 of the GL
Rules.

4.2.3
4.2.3.aThis regulation is based on B1, B2, B3, D1 and D2 of Sec. 16, Chapter I-1-1 of the GL
Rules.

4.3

Deck beams and supporting deck structure

4.3.1

Transverse deck beams and longitudinal ordinary stiffeners

4.3.1.aThis regulation is based on B1, B2, B3, D1 and D2 of Sec. 16, Chapter I-1-1 of the GL
Rules.

4.3.2

Deck girders and transverses

4.3.2.aThis regulation is based on B1, B2, B3, D1 and D2 of Sec. 16, Chapter I-1-1 of the GL
Rules.

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4.4

Superstructure frames

4.4.1

Section modulus and shear area

4.4.1.aThis regulation is based on B1, B2, B3, D1 and D2 of Sec. 16, Chapter I-1-1 of the GL
Rules.

4.4.2
4.4.2.aThis regulation is based on B1, B2, B3, D1 and D2 of Sec. 16, Chapter I-1-1 of the GL
Rules.

4.4.3
4.4.3.aThis regulation is based on B1, B2, B3, D1 and D2 of Sec. 16, Chapter I-1-1 of the GL
Rules.

4.5

Decks of short deckhouses

4.5.1

Plating

4.5.1.aThis regulation is based on B1, B2, B3, D1 and D2 of Sec. 16, Chapter I-1-1 of the GL
Rules.

4.5.2

Deck beams

4.5.2.aThis regulation is based on B1, B2, B3, D1 and D2 of Sec. 16, Chapter I-1-1 of the GL
Rules.

5. SUPERSTRUCTURE END BULKHEADS AND DECKHOUSE WALLS
5.1

Application

5.1.1
5.1.1.a

5.2

Design loads are based on IACS UR S3. The regulations are based on C3.1 and 3.2,
Sec. 16, Chapter I-1-1 of the GL Rules, in addition to the regulations of Section 5,
Chapter 4.

Loads

5.2.1
5.2.1.a

5.3

The loads to be considered are specified.

Scantlings

5.3.1 Stiffeners
5.3.1.aThis requirement is based on GL Rules.

5.3.2 Plate thickness
5.3.2.aThis requirement is based on GL Rules.

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PAGE 28 – CHAPTER 9: OTHER STRUCTURESSECTION 5 – HATCH COVERS
1. GENERAL
1.1

Application

1.1.1
1.1.1.a

The regulations of this section are based on the International Load Line Convention,
IACS UR S21 and UR S26 and Section 7, Chapter 9, Part B of the BV Rules. Wheninternal pressure of ballast water in the ballast hold is considered, the hatch cover istreated as not being acted upon by hydrostatic pressure from the air vent installedin the hatch coaming.

1.1.1.b

To consider this, the loads due to ballast in the ballast hold specified in Section 6
Chapter 4 were divided into hydrostatic pressure and dynamic pressure, thehydrostatic pressure was multiplied by 0 and the dynamic pressure by 0.9.

1.2

Materials

1.2.1

Steel

1.2.1.aThis requirement is based on [1.2.1] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

1.2.2

Other materials

1.2.2.aThis requirement is based on [1.2.2] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

1.3

Net scantlings

1.3.1
1.3.1.a

1.4

This requirement is based on [1.3.1] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

Corrosion additions

1.4.1
1.4.1.a

1.5This requirement is based on UR S21.6.1 and [1.5.1] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

Allowable stresses

1.5.1
1.5.1.aThis requirement is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.(15.6) and (16.5)) and [1.4] of Part B, Chapter 9, Section 7 of BV Rules for Steel
Ships.

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2. ARRANGEMENTS
2.1

Height of hatch coamings

2.1.1
2.1.1.aThis requirement is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.14 (1,1)) and [2.1.1] of Part B, Chapter 9, Section 7 of BV Rules for Steel Ships.

2.1.2
2.1.2.aThis requirement is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.14 (1,2)) and [2.1.2] of Part B, Chapter 9, Section 7 of BV Rules for Steel Ships.

2.1.2.b

2.2

Hatch covers

2.2.1.aThis requirement is based on [2.2.1] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

2.2.2
2.2.2.aThis requirement is based on UR S21.1 and [2.2.2] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

2.2.3
2.2.3.aThis requirement is based on UR S21.1 and [2.2.3] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

2.2.4
2.2.4.aThis requirement is based on UR S21.3.5 and [2.2.4] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

2.2.5
2.2.5.aThis requirement is based on [2.2.6] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

2.2.6
2.2.6.a

2.3

This requirement is based on [2.2.7] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

Hatch coamings

2.3.1
2.3.1.aThis requirement is based on [2.3.1] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

2.3.2
2.3.2.aThis requirement is based on [2.3.2] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

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2.3.3
2.3.3.aThis requirement is based on [2.3.3] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

2.3.4
2.3.4.a

2.4

This requirement specifies the structural continuity under transverse coamings.

Small hatchways

2.4.1
2.4.1.aThis requirement is based on [2.4.1] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

2.4.2
2.4.2.aThis requirement is based on [2.4.2] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

2.4.3
2.4.3.aThis requirement is based on [2.4.3] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

2.4.4
2.4.4.aThis requirement is based on [2.4.4] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

2.4.5
2.4.5.aThis requirement is based on [2.4.5] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

3. WIDTH OF ATTACHED PLATING
3.1

Ordinary stiffeners

3.1.1
3.1.1.a

3.2

This requirement is based on [3.1.1] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

Primary supporting members

3.2.1
3.2.1.aThis requirement is based on UR S21.3.2 and [3.2.1] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

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4. LOAD MODEL
4.1

Lateral pressures and forces

4.1.1

General4.1.1.aThis requirement is based on UR S21.2 and [4.1.1] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

4.1.2

Sea pressures

4.1.2.aThis requirement is based on UR S21.2 and [4.1.2] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

4.1.3

Internal pressures due to ballast water

4.1.3.aThis requirement is based on [4.1.3] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

4.1.4

Pressures due to uniform cargoes

4.1.4.aThis requirement is based on [4.1.4] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

4.1.5

Pressures or forces due to special cargoes

4.1.5.aThis requirement is based on [4.1.7] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

4.1.6

Forces due to containers

4.1.6.aThis requirement is based on [4.1.5] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

4.2

Load point

4.2.1

Wave lateral pressure for hatch covers on exposed decks

4.2.1.aThis requirement is based on UR S21.2 and [4.3.1] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

4.2.2

Lateral pressures other than the wave pressure

4.2.2.aThis requirement is based on [4.3.2] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

4.2.2.b

5. STRENGTH CHECK
5.1

General

5.1.1

Application

5.1.1.aThis requirement is based on UR S21.3.1 and [5.1.1] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

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5.1.2

Hatch covers supporting containers

5.1.2.aThis requirement specifies that container loads are to be considered, if any. As nocontainer loads are defined in CSR for Bulk Carriers, they are to be determined byeach Society.

5.1.3

Hatch covers subjected to special cargoes

5.1.3.aThis requirement is based on [5.1.3] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

5.1.4

Covers of small hatchways

5.1.4.aThis requirement is based on [5.1.4] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

5.2

Plating

5.2.1

Net thickness

5.2.1.aThis requirement is based on UR S21.3.3 and [5.2.1] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

5.2.2

Minimum net thickness

5.2.2.aThis requirement is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.16 (5, c)) and [5.2.2] of Part B, Chapter 9, Section 7 of BV Rules for Steel Ships.

5.2.3

Critical buckling stress check5.2.3.aThis requirement is based on UR S21.3.6.1 and [5.2.3] of Part B, Chapter 9, Section 7of BV Rules for Steel Ships.

5.3

Ordinary stiffeners

5.3.1
5.3.1.aThis requirement is based on UR S21.3.6.2 and [5.3.2] of Part B, Chapter 9, Section 7of BV Rules for Steel Ships.

5.3.2

Minimum net thickness of web

5.3.2.aThis requirement is based on [5.3.7] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

5.3.3

Net section modulus and net shear sectional area

5.3.3.aThis requirement is based on UR S21.3.4 and [5.3.6] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

5.3.4

Critical buckling stress check5.3.4.aThis requirement is based on UR S21.3.6.2 and [5.3.5 b] of Part B, Chapter 9, Section
7 of BV Rules for Steel Ships.

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5.4

Primary supporting members

5.4.1

Application

5.4.1.aThis requirement is based on UR S21.3.5 and [5.3.3] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

5.4.2

Minimum net thickness of web

5.4.2.aThis requirement is based on [5.3.7] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

5.4.3

Normal and shear stress for isolated beam

5.4.3.aThis requirement is based on [5.3.4] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

5.4.4

Checking criteria

5.4.4.aThis requirement is based on UR S21.3.1 and [5.3.5] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

5.4.5

Deflection limit

5.4.5.aThis requirement is based on UR S21.3.7 and [5.3.5 d)] of Part B, Chapter 9, Section 7of BV Rules for Steel Ships.

5.4.6

Critical buckling stress check of the web panels of the primary supporting
members

5.4.6.aThis requirement is based on UR S21.3.6.3 and [5.3.5 c)] of Part B, Chapter 9, Section
7 of BV Rules for Steel Ships.

5.5

Ordinary stiffeners and primary supporting members of variable crosssection

5.5.1
5.5.1.aThis requirement is based on [5.3.8] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

6. HATCH COAMINGS
6.1

Stiffening

6.1.1
6.1.1.aThis requirement is based on UR S21.1 and [6.1.1] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

6.1.2
6.1.2.aThis requirement is based on [6.1.2] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

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6.1.3
6.1.3.aThis requirement is based on [6.1.3] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

6.1.4
6.1.4.aThis requirement is based on [6.1.4] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

6.1.5
6.1.5.a

6.2

This requirement is based on [6.1.5] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

Load model

6.2.1
6.2.1.aThis requirement is based on UR S21.4.1 and [6.2.1] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

6.2.2
6.2.2.aThis requirement is based on UR S21.4.1 and [6.2.2] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

6.2.3
6.2.3.aThis requirement is based on UR S21.4.1 and [6.2.3] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

6.2.4
6.2.4.aThis requirement is based [6.2.1] of Part B, Chapter 9, Section 7 of BV Rules for Steel
Ships.

6.3

Scantlings

6.3.1

Plating

6.3.1.aThis requirement is based on UR S21.4.2 and [6.4.1] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

6.3.2

Ordinary stiffeners

6.3.2.aThis requirement is based on UR S21.4.3 and [6.4.2] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

6.3.3

Coaming stays

6.3.3.aThis requirement is based on UR S21.4.4 and [6.4.3] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

6.3.4

Local details

6.3.4.aThis requirement is based on UR S21.4.5 and [6.4.4] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships
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6.3.5

Coamings of small hatchways

6.3.5.aThis requirement is based on [6.3.5] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

7. WEATHERTIGHTNESS, CLOSING ARRANGEMENT, SECURING DEVICESAND STOPPERS
7.1

Weathertightness

7.1.1
7.1.1.aThis requirement is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.16 (1)) and [7.1.1] of Part B, Chapter 9, Section 7 of BV Rules for Steel Ships.

7.1.2
7.1.2.a

7.2

This requirement is based on [7.1.2] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

Gaskets

7.2.1
7.2.1.aThis requirement is based on [7.2.1] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

7.2.2
7.2.2.aThis requirement is based on [7.2.2] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

7.2.3
7.2.3.aThis requirement is based on [7.2.3] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships

7.2.4
7.2.4.aThis requirement is based on [7.2.4] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

7.2.5
7.2.5.aThis requirement is based on [7.2.5] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

7.2.6
7.2.6.aThis requirement is based on [7.2.6] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

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7.3

Closing arrangement, securing devices and stoppers

7.3.1

General7.3.1.aThis requirement is based on UR S21.5.1 and [7.3.1] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

7.3.2

Arrangements

7.3.2.aThis requirement is based on UR S21.5.1 and [7.3.2] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

7.3.3

Spacing

7.3.3.aThis requirement is based on [7.3.3] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

7.3.4

Construction

7.3.4.aThis requirement is based on UR S21.5.1 and [7.3.4] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

7.3.5

Area of securing devices

7.3.5.aThis requirement is based on UR S21.5.1 and [7.3.5] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

7.3.6

Inertia of edges elements

7.3.6.aThis requirement is based on UR S21.5.1 and [7.3.6] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

7.3.7

Diameter of rods or bolts

7.3.7.aThis requirement is based on UR S21.5.1 and [7.3.7] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

7.3.8

Stoppers

7.3.8.aThis requirement is based on UR S21.5.2 and [7.3.8] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

7.4

Tarpaulins

7.4.1
7.4.1.a

7.5

This requirement is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.15 (11)) and based on [7.4.1] of Part B, Chapter 9, Section 7 of BV Rules for Steel
Ships.

Cleats

7.5.1
7.5.1.aThis requirement is based on [7.5.1] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

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7.5.2
7.5.2.aThis requirement is based on [7.5.2] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

7.6

Wedges

7.6.1

Wedges

7.6.1.aThis requirement is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.15 (10)) and based on [7.6.1] of Part B, Chapter 9, Section 7 of BV Rules for Steel
Ships.

8. DRAINAGE
8.1

Arrangement

8.1.1
8.1.1.aThis requirement is based on [8.1.1] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

8.1.2
8.1.2.aThis requirement is based on [8.1.2] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

8.1.3
8.1.3.aThis requirement is based on [8.1.3] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

8.1.4
8.1.4.aThis requirement is based on [8.1.4] of Part B, Chapter 9, Section 7 of BV Rules for
Steel Ships.

8.1.4.b

9. SMALL HATCHES FITTED ON THE EXPOSED FORE DECK
9.1

Application

9.1.1
9.1.1.aThis requirement is based on UR S26.2 and [9.1.1] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

9.1.2
9.1.2.aThis requirement is based on UR S26.1 and [9.1.2] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

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9.2

Strength

9.2.1
9.2.1.aThis requirement is based on UR S26.4.1 and [9.2.1] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

9.2.2
9.2.2.aThis requirement is based on UR S26.4.2 and [9.2.2] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

9.2.3
9.2.3.aThis requirement is based on UR S26.4.3 and [9.2.3] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

9.2.4
9.2.4.a

9.3

This requirement is based on UR S26.4.4 and [9.2.4] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

Weathertightness

9.3.1
9.3.1.a

9.4

This requirement is based on UR S26.6.1 and [9.3.1] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

Primary securing devices

9.4.1
9.4.1.aThis requirement is based on UR S26.5 and [9.4.1] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

9.4.2
9.4.2.aThis requirement is based on UR S26.6.2 and [9.4.2] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

9.4.3
9.4.3.aThis requirement is based on UR S26.6.3 and [9.4.3] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

9.4.4
9.4.4.aThis requirement is based on UR S26.6.4 and [9.4.4] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

9.4.5
9.4.5.aThis requirement is based on UR S26.6.5 and [9.4.5] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

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9.5

Secondary securing devices

9.5.1
9.5.1.aThis requirement is based on UR S26.7 and [9.5.1] of Part B, Chapter 9, Section 7 of
BV Rules for Steel Ships.

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PAGE 40 – CHAPTER 9: OTHER STRUCTURESSECTION 6 – ARRANGEMENT OF HULL AND
SUPERSTRUCTURE OPENINGS
1. GENERAL
1.1

Application

1.1.1
1.1.1.aThis regulation is based on the regulations in Section 9, Chapter 9, Part B of the BV
Rules. Regulations related to material of glass were corrected with a note to refer to
ISO standards.

1.2

Definitions

1.2.1

Standard height of superstructure

1.2.1.aThis requirement is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.33) and based on [1.2.1] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

1.2.2

Standard sheer

1.2.2.aThis requirement is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.38) and based on [1.2.2] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

1.2.3

Exposed zones

1.2.3.aThis requirement is based on [1.2.3] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

1.2.4

Unexposed zones

1.2.4.aThis requirement is based on [1.2.4] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

2. EXTERNAL OPENINGS
2.1

General

2.1.1
2.1.1.aThis regulation is in accordance with SOLAS Reg.II-1/25-10 .1 and based on [2.1.1]
of Part B, Chapter 9, Section 9 of BV Rules for Steel Ships.

2.1.2
2.1.2.aThis regulation is in accordance with SOLAS Reg.II-1/25-10 .2 and based on [2.1.2]
of Part B, Chapter 9, Section 9 of BV Rules for Steel Ships.

2.1.3
2.1.3.aThis requirement is based on [2.1.3] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.
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2.1.4
2.1.4.a2.2

This regulation is in accordance with SOLAS Reg.II-1/25-10 .5 and based on [2.1.4]
of Part B, Chapter 9, Section 9 of BV Rules for Steel Ships.

Gangway, cargo and coaling ports

2.2.1
2.2.1.aThis regulation is in accordance with SOLAS Reg.II-1/17-1 & Reg.II-1/17-10.1&10.2
and ILLC, as amended, (Resolution MSC.143(77) Reg.21(2)).

3. SIDE SCUTTLES, WINDOWS AND SKYLIGHTS
3.1

General

3.1.1

Application

3.1.1.aThis requirement is based on [3.1.1] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

3.1.2

Side scuttle definition

3.1.2.aThis requirement is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.23(2)) and based on [3.1.2] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

3.1.3

Window definition

3.1.3.aThis requirement is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.23(3)) and based on [3.1.3] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

3.1.4

Number of openings in the shell plating

3.1.4.aThis regulation is in accordance with SOLAS Reg.II-1/17-1 & Reg.II-1/17-2 andbased on [3.1.4] of Part B, Chapter 9, Section 9 of BV Rules for Steel Ships.

3.1.5

Material and scantlings

3.1.5.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.23(1)) and based on [3.1.5] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

3.1.6

Means of closing and opening

3.1.6.aThis regulation is in accordance with SOLAS Reg.II-1/17-1 & Reg.II-1/17-2 andbased on [3.1.6] of Part B, Chapter 9, Section 9 of BV Rules for Steel Ships.

3.1.7

Opening of side scuttles

3.1.7.aThis regulation is in accordance with SOLAS Reg.II-1/17-1 & Reg.II-1/17-3.2 andbased on [3.1.7] of Part B, Chapter 9, Section 9 of BV Rules for Steel Ships.

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3.2

Opening arrangement

3.2.1

General3.2.1.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.23(5)) and based on [3.2.1] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

3.2.2

Side scuttles below (1.4 + 0.025B)m above the water

3.2.2.aThis regulation is in accordance with SOLAS Reg.II-1/17-1 & Reg.II-1/17-3.3.1 &3.3.3 and based on [3.2.2] of Part B, Chapter 9, Section 9 of BV Rules for Steel Ships.

3.2.3

Cargo spaces

3.2.3.aThis regulation is in accordance with SOLAS Reg.II-1/17-1 & Reg.II-1/17-6.1 to 6.3
and based on [3.2.3] of Part B, Chapter 9, Section 9 of BV Rules for Steel Ships.

3.2.4

Non-opening type side scuttles

3.2.4.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.23(6)) and based on [3.2.4] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

3.2.5

Manholes and flush scuttles

3.2.5.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.18(1)) and based on [3.2.5] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

3.2.6

Automatic ventilating scuttles

3.2.6.aThis regulation is in accordance with SOLAS Reg.II-1/17-1 & Reg.II-1/17-7 andbased on [3.2.7] of Part B, Chapter 9, Section 9 of BV Rules for Steel Ships.

3.2.7

Window arrangement

3.2.7.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.23(7)) and based on [3.2.8] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

3.2.8

Skylights

3.2.8.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.23(12)) and based on [3.2.9] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

3.3

Glasses

3.3.1

General3.3.1.aThis requirement is based on [3.3.1] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

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3.3.2

Design loads

3.3.2.aThis requirement is based on [3.3.2] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

3.3.3

Materials

3.3.3.aThis requirement is based on [3.3.3] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

3.3.4

Thickness of toughened glasses in side scuttles

3.3.4.aThis requirement is based on [3.3.4] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

3.3.5

Thickness of toughened glasses in rectangular windows

3.3.5.aThis requirement is based on [3.3.5] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

3.4

Deadlight arrangement

3.4.1

General3.4.1.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.23(4)) and based on [3.4.1] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

3.4.2

Openings at the side shell in the second tier3.4.2.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.23(8)) and based on [3.4.2] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

3.4.3

Openings set inboard in the second tier3.4.3.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.23(9) and 23(10)) and based on [3.4.3] of Part B, Chapter 9, Section 9 of BV Rules
for Steel Ships.

3.4.4

Deckhouses on superstructures of less than standard height

3.4.4.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.23(11)) and based on [3.4.4] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

3.4.5

Openings protected by a deckhouse

3.4.5.aThis requirement is based on [3.4.6] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

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4. DISCHARGES
4.1

Arrangement of discharges

4.1.1

Inlets and discharges

4.1.1.aThis regulation is in accordance with SOLAS Reg.II-1/17-1 & Reg.II-1/17-9.1 andbased on [4.1.1] of Part B, Chapter 9, Section 9 of BV Rules for Steel Ships.

4.1.2

Inboard opening of ash-shoot, rubbish-shoot, etc.

4.1.2.aThis regulation is in accordance with SOLAS Reg.II-1/17-1 & Reg.II-1/17-11.1 &11.2 and based on [4.1.2] of Part B, Chapter 9, Section 9 of BV Rules for Steel Ships.

4.2

Arrangement of garbage chutes

4.2.1

Inboard end above the waterline

4.2.1.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.22-1(1,b)) and based on [4.2.1] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

4.2.2

Inboard end below the waterline

4.2.2.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.22-1(4)) and based on [4.2.2] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

4.2.3

Gate valves

4.2.3.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.22-1(1,a)) and based on [4.2.3] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

4.2.4

Hinged cover and discharge flap

4.2.4.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.22-1(1,c)) and based on [4.2.4] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

4.2.5

Making of valve and hinged cover

4.2.5.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.22-1(3)) and based on [4.2.5] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

4.3

Scantling of garbage chutes

4.3.1

Material

4.3.1.aThis requirement is based on [4.3.1] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

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4.3.2

Wall thickness

4.3.2.aThis requirement is based on [4.3.2] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

5. FREEING PORTS
5.1

General provisions

5.1.1

General5.1.1.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.24 (1,a) & Reg.3 (15)) and based on [5.1.1] of Part B, Chapter 9, Section 9 of BV
Rules for Steel Ships.

5.1.2

Freeing port areas

5.1.2.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.24) and based on [5.1.2] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

5.1.3

Freeing port arrangement

5.1.3.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.24 (5)) and based on [5.1.3] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

5.1.4

Freeing port positioning

5.1.4.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.24 (5) & Reg.24 (6)) and based on [5.1.4] of Part B, Chapter 9, Section 9 of BV
Rules for Steel Ships.

5.1.5

Freeing port closures

5.1.5.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.24 (6)) and based on [5.1.5] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

5.2

Freeing port area in a well not adjacent to a trunk or hatchways

5.2.1

Freeing port area

5.2.1.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.24 (1, b & c)) and based on [5.2.1] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

5.2.2

Minimum freeing port area for a deckhouse having breath not less than 0.8B

5.2.2.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.24 (1, d)) and based on [5.2.2] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

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5.2.3

Minimum freeing port area for screen bulkhead

5.2.3.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.24 (1, e)) and based on [5.2.3] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

5.3

Freeing port area in a well contiguous to a trunk or hatchways

5.3.1

Freeing area for continuous trunk or continuous hatchway coaming

5.3.1.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.24 (2)) and based on [5.3.1] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

5.3.2

Freeing area for non-continuous trunk or hatchway coaming

5.3.2.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.24 (3)) and based on [5.3.2] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

5.4

Freeing port area in an open space within superstructures

5.4.1

General5.4.1.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.24 (4)) and based on [5.4.1] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

5.4.2

Freeing port area for open superstructures

5.4.2.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.24 (4)) and based on [5.4.2] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

5.4.3

Freeing port area for open well

5.4.3.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.24 (4)) and based on [5.4.3] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

5.5

Freeing port area in bulwarks of the freeboard deck for ships of types B-100
and B-60

5.5.1

Freeing arrangement for type B-60

5.5.1.aThis requirement is based on [5.5.1] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

5.5.2

Freeing arrangement for type B-100 ships with trunks

5.5.2.aThis requirement is based on [5.5.2] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

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6. MACHINERY SPACE OPENINGS
6.1

Engine room skylights

6.1.1
6.1.1.aThis requirement is based on [6.1.1] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

6.2

Closing devices

6.2.1

Machinery casings

6.2.1.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.17 (1) & 12(1)) and based on [6.2.1] of Part B, Chapter 9, Section 9 of BV Rules
for Steel Ships.

6.2.2

Height of the sill of the door

6.2.2.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.17 (1 & 2)) and based on [6.2.3] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

6.2.3

Double doors

6.2.3.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.17 (1 & 2)) and based on [6.2.4] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

6.2.4

Fiddly openings

6.2.4.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.17 (5 )) and based on [6.2.5] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

6.3

Coamings

6.3.1
6.3.1.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.17 (3 )) and based on [6.3.1] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

6.3.2
6.3.2.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.17 (4 )) and based on [6.3.1] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

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7. COMPANIONWAY
7.1

General

7.1.1

Openings in freeboard deck

7.1.1.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.18 (2 )) and based on [7.1.1] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

7.1.2

Openings in superstructures

7.1.2.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.18 (2 )) and based on [7.1.2] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

7.1.3

Openings superstructures having height less than standard height

7.1.3.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.18 (3)) and based on [7.1.3] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

7.2

Scantlings

7.2.1
7.2.1.aThis requirement is based on [7.2.1] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

7.3

Closing devices

7.3.1

Doors

7.3.1.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.18 (2)) and based on [7.3.1] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

7.3.2

Height of sills

7.3.2.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.18 (4 to 6)) and based on [7.3.2] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

8. VENTILATORS
8.1

Closing appliances

8.1.1

General8.1.1.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.19 (4 )) and based on [8.1.1] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

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8.1.2

Closing appliance exemption

8.1.2.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.19 (3)) and based on [8.1.2] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

8.1.3

Closing appliances for ships of not more than 100 m in length

8.1.3.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.19 (4 )) and based on [8.1.3] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

8.1.4

Closing appliances for ships of more than 100 m in length

8.1.4.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.19 (4 )) and based on [8.1.4] of Part B, Chapter 9, Section 9 of BV Rules for Steel
Ships.

8.1.5

Ventilation of machinery spaces and emergency generator room

8.1.5.aThis requirement is based on [8.1.5] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

8.1.6

Reduced height of ventilator coamings for machinery spaces and emergency
generator room

8.1.6.aThis requirement is based on [8.1.6] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

8.1.7

Closing arrangements of ventilators led overboard or through enclosed
superstructures

8.1.7.aThis requirement is based on [8.1.7] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

8.2

Coamings

8.2.1

General8.2.1.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.19 (1 & 2)) and based on [8.2.1] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

8.2.2

Scantlings

8.2.2.aThis regulation is in accordance with ILLC, as amended, (Resolution MSC.143(77)Reg.19 (1 & 2)) and based on [8.2.2] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

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9. TANK CLEANING OPENINGS
9.1

General

9.1.1
9.1.1.aThis requirement is based on [9.1.1] of Part B, Chapter 9, Section 9 of BV Rules for
Steel Ships.

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