SVR_Part_5C1_e-July17.pdf

P a r t 5 C : S p e c i f i c V e s s e l T y p e s ( C h a p t e r s 1 - 6 )

RULES FOR BUILDING AND CLASSING

STEEL VESSELS

PART 5C

SPECIFIC VESSEL TYPES (CHAPTERS 1-6)

(Updated July 2017 – see next page)

American Bureau of Shipping Incorporated by Act of Legislature of the State of New York 1862

2016 American Bureau of Shipping. All rights reserved.

ABS Plaza 16855 Northchase Drive Houston, TX 77060 USA

Updates

July 2017 consolidation includes:

• February 2017 version plus Notice No. 1 and Corrigenda/Editorials

February 2017 consolidation includes:

• January 2017 version plus Corrigenda/Editorials

F o r e w o r d

Foreword In association with the harmonization of the Common Structural Rules (CSR) for Bulk Carriers and Oil Tankers, on 1 July 2015, the three Sub-parts, 5A, 5B, and 5C, of Part 5 of the Rules for Building and Classing Steel Vessels are as follows:

Contents Part 5A: General Hull Requirements (IACS CSR Part 1)

Part 5B: Ship Types (IACS CSR Part 2)

Part 5C: This Part is divided into two separate booklets as follows:

Chapters 1 to 6: Tankers and Bulk Carriers not covered by Part 5A and Part 5B and Container Carriers

Chapters 7 to 13: Passenger Vessels, Liquefied Gas Carriers, Chemical Carriers, Vessels Intended to Carry Vehicles, Water Carriers, Membrane Tank LNG Carriers, and Vessels Using Gases or other Low- Flashpoint Fuels.

Application – Oil Tankers The structural requirements in Part 5A, Pt 1 and Part 5B, Pt 2, Ch 2 of the Rules are applicable for double hull oil tankers of 150 m in length and upward, with structural arrangements as specified in Part 5A, Pt 1, Ch 1, Sec 1, [1.3].

For oil tankers with structural arrangements not covered by Part 5A, Pt 1 and Part 5B, Pt 2, Ch 2, the requirements in Part 5C, Chapters 1 or 2, are to be complied with.

Application – Bulk Carriers The structural requirements in Part 5A, Pt 1 and Part 5B, Pt 2, Ch 1 of the Rules are applicable for single side skin and double side skin bulk carriers of 90m in length and upward, with structural arrangements as specified in Part 5A, Pt 1, Ch 1, Sec 1, [1.2].

For vessels intended to carry ore or bulk cargoes, other than the single side skin or double side skin bulk carriers of 90 m in length and upward with structural arrangements as specified in Part 5A, Pt 1 and Part 5B, Pt 2, Ch 1, the requirements in Part 5C, Chapters 3 or 4 are to be complied with.

Application – ABS Construction Monitoring Program These compulsory requirements for CSR notation are specified in Part 5C, Appendix 2.

Application – Onboard Systems for Oil Tankers and Bulk Carriers The onboard systems for all tankers are to comply with the requirements of Part 5C, Chapter 1, Section 7, and for all bulk carriers are to comply with the requirements of Part 5C, Chapter 3, Section 7 of the Rules.

Application – References Other Parts of the ABS Rules that are referenced within Part 5A, 5B, or 5C are also to be applied.

The following flow chart indicates the application of the Rules and typical Class Notations for tanker and bulk carrier vessels, of which arrangements and scantlings are in full compliance with the Rules:

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS . 2017 iii

Vessels Intended to Carry Oil in Bulk Vessels Intended to Carry Ore or Bulk Cargoes

L ≥ 150 m?

Arrangement and layout comply with

Part 5A, Pt 1, Ch 1, Sec 1, [1.3] and Part 5A, Pt 1, Ch 1, Sec 1, Figure 3?

Part 5A, Pt 1 and Part 5B, Pt 1, Ch 2:

Common Structural Rules and Part 5C, Appendix 2

Part 5C, Chapter 1, Section 7:

ABS Steel Vessel Rules

À A1 Oil Carrier, CSR, AB-CM plus appropriate notations for oil carriers

Part 5C, Chapter 1, Appendix 1 to Part 5C

ABS Steel Vessel Rules (L ≥ 150 m)

À A1 Oil Carrier, SH, SHCM plus appropriate notations for oil carriers

Part 5C, Chapter 2 ABS Steel Vessel Rules

(L < 150 m)

À A1 Oil Carrier plus appropriate notations for oil carriers

L ≥ 90 m?

Arrangement and layout comply with

Part 5A, Pt 1, Ch 1, Sec 1, [1.2] and Part 5A, Pt 1, Ch 1, Sec 1, Figures 1 & 2?

Part 5A, Pt 1 and Part 5B, Pt 1, Ch 1:

Common Structural Rules and Part 5C, Appendix 2

Part 5C, Chapter 3, Section 7:

ABS Steel Vessel Rules

Part 5C, Chapter 3, Appendix 1 to Part 5C

ABS Steel Vessel Rules (L ≥ 150 m)

Part 5C, Chapter 4 ABS Steel Vessel Rules

(L < 150 m)

À A1 Bulk Carrier, CSR, AB-CM plus appropriate notations for bulk carriers

À A1 Bulk Carrier, SH, SHCM plus appropriate notations for bulk carriers

À A1 Bulk Carrier plus appropriate notations for bulk carriers

Yes

Yes

Yes

Yes

No No

Or

No No iv ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS . 2017

R u l e C h a n g e N o t i c e ( 2 0 1 7 )

Rule Change Notice (2017) The effective date of each technical change since 1993 is shown in parenthesis at the end of the subsection/paragraph titles within the text of each Part. Unless a particular date and month are shown, the years in parentheses refer to the following effective dates:

(2000) and after 1 January 2000 (and subsequent years) (1996) 9 May 1996 (1999) 12 May 1999 (1995) 15 May 1995 (1998) 13 May 1998 (1994) 9 May 1994 (1997) 19 May 1997 (1993) 11 May 1993

Listing by Effective Dates of Changes from the 2016 Rules

Notice No. 1 (effective on 1 July 2016) to the 2016 Rules, which is incorporated in the 2017 Rules, is summarized below.

EFFECTIVE DATE 1 July 2016 – shown as (1 July 2016) (based on the contract date for new construction between builder and Owner)

Part/Para. No. Title/Subject Status/Remarks 5C-5-1/1.3.1 Size and Proportions To align the requirements with the new IACS UR S11A and S34, which implement the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort.

(Incorporates Notice No. 1)

5C-5-1/1.3.3 Direct Calculation To align the requirements with the new IACS UR S11A and S34, which implement the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort.

(Incorporates Notice No. 1)

5C-5-2/1.1 General To align the requirements with the new IACS UR S11A, which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-3/1.1 Load Components To align the requirements with the new IACS UR S11A and S34, which implement the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort.

(Incorporates Notice No. 1)

5C-5-3/3 Static Loads To align the requirements with the new IACS UR S11A and S34, which implement the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort.

(Incorporates Notice No. 1)

5C-5-3/3.1 Still-water Bending Moments, Shear Forces and Torsional Moment

To align the requirements with the new IACS UR S11A and S34, which implement the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort.

(Incorporates Notice No. 1)

5C-5-3/Figure 1A (New)

Sign Convention for Vertical Bending Moments and Vertical Shear Forces

To align the requirements with the new IACS UR S11A and S34, which implement the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort.

(Incorporates Notice No. 1)

5C-5-3/Figure 1B Sign Conventions for Horizontal Bending Moments, Horizontal Shear Forces and Torsional Moments

To align the requirements with the new IACS UR S11A and S34, which implement the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort.

(Incorporates Notice No. 1)

5C-5-3/5 Wave-induced Loads To align the requirements with the new IACS UR S11A and S34, which implement the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort.

(Incorporates Notice No. 1)

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS . 2017 v

Part/Para. No. Title/Subject Status/Remarks 5C-5-3/5.1.1 Vertical Wave Bending Moment To align the requirements with the new IACS UR S11A and S34, which implement the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort.

(Incorporates Notice No. 1)

5C-5-3/Figure 4 (New)

Projected Area ADK and Vertical Distance yf

To align the requirements with the new IACS UR S11A and S34, which implement the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort.

(Incorporates Notice No. 1)

5C-5-3/Figure 5 (New)

Distribution of Vertical Wave Bending Moment Along the Ship Length

To align the requirements with the new IACS UR S11A and S34, which implement the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort.

(Incorporates Notice No. 1)

5C-5-3/5.1.2 Vertical Wave Shear Force To align the requirements with the new IACS UR S11A and S34, which implement the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort.

(Incorporates Notice No. 1)

5C-5-3/Figure 6 (New)

Distribution of Vertical Wave Shear Force along the Ship Length

To align the requirements with the new IACS UR S11A and S34, which implement the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort.

(Incorporates Notice No. 1)

5C-5-3/9.1 Combined Load Cases for Structural Analysis

To align the requirements with the new IACS UR S11A and S34, which implement the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort.

(Incorporates Notice No. 1)

5C-5-3/9.3 Combined Load Cases for Strength Assessment

To align the requirements with the new IACS UR S11A and S34, which implement the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort.

(Incorporates Notice No. 1)

5C-5-4/3.1 Longitudinal Hull Girder Strength To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/Figure 3 (New)

Ends of Length To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/Figure 4 (New)

Reference Coordinate System To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/Table 1 (New)

Values of Corrosion Addition Factor To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/Table 2 (New)

Corrosion Addition for One Side of a Structural Member

To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/Figure 5 (New)

Net Sectional Properties of Supporting Members

To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/Figure 6 (New)

Example of Failure Limit State Curve and Stress Multiplication Factor at Failure

To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1) vi ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS . 2017

5C-5-4/Table 3 (New)

Load Calculation Points (LCP) Coordinates for Plate Buckling Assessment

To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/Figure 7 (New)

Load Calculation Points for Plate Buckling Assessment

To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/Figure 8 (New)

Bending Moment M versus Curvature χ

To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/Table 4 (New)

Permissible Hull Girder Bending Stress

To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/Table 5 (New)

Permissible Hull Girder Shear Stress To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/3.3 (Deleted)

Hull Girder Moment of Inertia To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/5 (Deleted)

Hull Girder Shearing Strength To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/9.3.1 Bottom Shell Plating To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/9.3.2 Inner Bottom Plating To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/9.15 Longitudinally Stiffened Bottom Girders

To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/11.1 Side Shell Plating To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/11.3 Side Longitudinals and Side Frames To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/13.7 Side Stringers in Double Side Structures

To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/15.1 Strength Deck Plating To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS . 2017 vii

5C-5-4/15.13 Underdeck Passageway (Second

Deck) To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/19.1 Tank Bulkhead Plating To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/19.5 Watertight Bulkhead Plating To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/19.13.1 Tank Bulkhead Plating To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-4/5.3.2 Effective Width To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-5/5.13 (Deleted)

Hull Girder Ultimate Strength To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-A4a (New)

Calculation of Shear Flow To align the requirements with the new IACS UR S11A, which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-A4b (New)

Buckling Capacity To align the requirements with the new IACS UR S11A, which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-A4c (New)

Hull Girder Ultimate Bending Capacity of Container Carriers

To align the requirements with the new IACS UR S11A, which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-5-A5 (New)

Additional Loading Patterns and Loading Cases for Structural Analysis

To align the requirements with the new IACS UR S34, which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-6-2/1.1 Normal-strength Standard To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-6-2/1.3 Hull Girder Shear and Bending Moment

To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-6-2/1.5 Torsion and Horizontal Bending To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-6-2/1.7 Loading Guidance To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates viii ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS . 2017

5C-6-2/1.11 Hull Girder Section Modulus

Amidships To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-6-A1/3 Application To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates Notice No. 1)

5C-6-A1/5.3 Hull Girder Stress To align the requirements with the new IACS UR S11A which implements the findings from the investigations into the casualties of the Containerships MSC Napoli and MOL Comfort. (Incorporates

EFFECTIVE DATE 1 January 2017 – shown as (2017) (based on the contract date for new construction between builder and Owner)

Part/Para. No. Title/Subject Status/Remarks 5C-1-1/5.1 General To align the requirements with MARPOL 2011 consolidated edition.

5C-1-5/5.9.1(a) For Web Plate To clarify that the two methods, displacement or element component stress, have nothing to do with “meshing” within the panel is irregular or regular.

5C-1-7/3.3.1(i) (New)

Local Shutdown To specify requirements for local shutdown arrangements, in line with OCIMF 2.e) and ISGOTT 10.11.7 5th bullet.

5C-1-7/3.3.1(j) (New)

Double Seal Arrangement To specify requirements for a double seal arrangement and subsequent leakage alarm, in line with OCIMF 2.f), 3d) and ISGOTT 10.11.7 7th bullet.

5C-1-7/3.3.1(k) (New)

Leakage Alarm To specify requirements for a double seal arrangement and subsequent leakage alarm, in line with OCIMF 2.f), 3d) and ISGOTT 10.11.7 7th bullet.

5C-1-7/3.3.1(l) (New)

External Shutdown To specify requirements for external shutdown arrangements.

5C-1-7/3.3.2(f) (New)

Spray Shields To specify requirements for a spray shield or spray protection, in line with Part IV Chapter 1.2.2.2 of MSC.1/Circ.1321.

5C-1-7/11.5.4 (New)

Cargo Tanks Vent pipe Wall Thickness

To provide requirements for cargo vent pipe wall thickness and to incorporate the requirement of (c) of IACS UI LL36.

5C-1-7/23.1.3 Alternative to Deck Foam System To align the requirement with 5C-1-7/23.1.4.

5C-1-7/31.15.4 (New)

Means of Communication To specify requirements for a communication system in the cargo pump room, in line with OCIMF 1.a) 3rd paragraph and ISGOTT

10.10.2 4TH paragraph.

5C-1-7/31.15.5 (New)

Alarms To specify requirements for an alarm repeater in the cargo pump room, in line with OCIMF 1.a) 3rd paragraph and ISGOTT 10.10.2 4TH paragraph.

5C-2-1/5 Arrangement To align the requirements with MARPOL 2011 consolidated edition.

5C-5-4/27.1 Fuel Oil Tank Top Plating To align the requirements for existing allowable stresses for tank bulkhead between fuel oil tanks with the requirements in 5C-5-4/21.13.

5C-5-4/27.3 Fuel Oil Tank Top Longitudinals To align the requirements for existing allowable stresses for tank bulkhead between fuel oil tanks with the requirements in 5C-5-4/21.13.

5C-5-6/25.3.2 Center Girder To account for center girder constructed of higher-strength material, in line with 3-2-4/15.7 of the Steel Vessel Rules.

5C-5-7/3.5 (New)

Vessels Intended to Carry Containers On or Above the Weather Deck

To require specific firefighting equipment for container cargo protection such as 1 water mist lance, 2 or 4 mobile water monitors depending on whether vessel breadth is below or above 30 m and on specific fire water capacity.

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS . 2017 ix

Listing by Effective Dates of Changes from the 2017 Rules

Notice No. 1 (effective on 1 July 2017) to the 2017 Rules is summarized below.

EFFECTIVE DATE 1 July 2017 – shown as (1 July 2017) (based on the contract date for new construction between builder and Owner)

Part/Para. No. Title/Subject Status/Remarks 5C-1-1/5.35 (New)

Location of Fuel Tanks in Cargo Area To clarify the requirements for fuel tanks used for separating machinery spaces from cargo and slop tanks, in line with IACS UR M76, Apr.

2016. (Incorporates Notice No. 1)

5C-1-1/Figure 2 (New)

Cargo Tank Block To clarify the requirements for fuel tanks used for separating machinery spaces from cargo and slop tanks, in line with IACS UR M76, Apr.

2016. (Incorporates Notice No. 1)

5C-2-1/5.33 (New)

Location of Fuel Tanks in Cargo Area To clarify the requirements for fuel tanks used for separating machinery spaces from cargo and slop tanks, in line with IACS UR M76, Apr.

2016. (Incorporates Notice No. 1)

5C-2-1/Figure 2 (New)

Cargo Tank Block To clarify the requirements for fuel tanks used for separating machinery spaces from cargo and slop tanks, in line with IACS UR M76, Apr.

2016. (Incorporates Notice No. 1) x ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS . 2017

P A R T T a b l e o f C o n t e n t s

5C Specific Vessel Types

CONTENTS

CHAPTER 1 Vessels Intended to Carry Oil in Bulk (150 meters (492 feet) or more in Length) Section 1 Introduction Section 2 Design Considerations and General Requirements Section 3 Load Criteria Section 4 Initial Scantling Criteria Section 5 Total Strength Assessment Section 6 Hull Structure Beyond 0.4L Amidships Section 7 Cargo Oil and Associated Systems

Appendix 1 – Examples of Inerting/Gas Freeing Analysis of Ballast Tank

Appendix 1 Fatigue Strength Assessment of Tankers Appendix 2 Calculation of Critical Buckling Stresses Appendix 3 Application to Single Hull Tankers Appendix 4 Application to Mid-deck Tankers Appendix 5 Hull Girder Ultimate Strength Assessment of Oil

Carriers

CHAPTER 2 Vessels Intended to Carry Oil in Bulk (Under 150 meters

(492 feet) in Length) Section 1 Introduction Section 2 Hull Structure Section 3 Cargo Oil and Associated Systems

Appendix 1 Hull Girder Shear Strength for Tankers

CHAPTER 3 Vessels Intended to Carry Ore or Bulk Cargoes (150 meters

(492 feet) or more in Length) Section 1 Introduction Section 2 Design Considerations and General Requirements Section 3 Load Criteria Section 4 Initial Scantling Criteria Section 5 Total Strength Assessment Section 6 Hull Structure Beyond 0.4L Amidships Section 7 Cargo Safety and Vessel Systems

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS . 2017 xi

Appendix 1 Fatigue Strength Assessment of Bulk Carriers Appendix 2 Calculation of Critical Buckling Stresses Appendix 3 The Design and Evaluation of Ore and Ore/Oil Carriers Appendix 4 Load Cases for Structural Analysis with Respect to

Slamming Appendix 5a Longitudinal Strength of Bulk Carriers in Flooded

Conditions Appendix 5b Bulk Carriers in Flooded Conditions – Corrugated

Transverse Watertight Bulkheads Appendix 5c Bulk Carriers in Flooded Conditions – Permissible

Cargo Loads in Holds Appendix 6 Harmonized System of Notations and Corresponding

Design Loading Conditions for Bulk Carriers Appendix 7 Hull Girder Ultimate Strength Assessment of Bulk

Carriers

CHAPTER 4 Vessels Intended to Carry Ore or Bulk Cargoes (Under

150 meters (492 feet) in Length) Section 1 Introduction Section 2 Hull Structure Section 3 Cargo Safety and Vessel Systems

CHAPTER 5 Vessels Intended to Carry Containers (130 meters (427 feet) to 450 meters (1476 feet) in Length) Section 1 Introduction Section 2 Design Considerations and General Requirements Section 3 Load Criteria Section 4 Initial Scantling Criteria Section 5 Total Strength Assessment Section 6 Hull Structure Beyond 0.4L Amidships Section 7 Cargo Safety

Appendix 1 Fatigue Strength Assessment of Container Carriers Appendix 2 Calculation of Critical Buckling Stresses Appendix 3 Definition of Hull Girder Torsional Properties Appendix 4a Calculation of Shear Flow Appendix 4b Buckling Capacity Appendix 4c Hull Girder Ultimate Bending Capacity of Container

Carriers Appendix 5 Additional Loading Patterns and Loading Cases for

Structural Analysis xii ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS . 2017

CHAPTER 6 Vessels Intended to Carry Containers (Under 130 meters (427 feet) in Length) Section 1 Introduction Section 2 Hull Structure Section 3 Cargo Safety

Appendix 1 Strength Assessment of Container Carriers – Vessels

Under 130 meters (427 feet) in Length

APPENDIX 1 SafeHull Construction Monitoring Program

APPENDIX 2 ABS Construction Monitoring Program

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS . 2017 xiii

This Page Intentionally Left Blank

P A R T Chapter 1: Vessels Intended to Carry Oil in Bulk (150 meters (492 feet) or more in Length)

C H A P T E R 1 Vessels Intended to Carry Oil in Bulk (150 meters

(492 feet) or more in Length)

CONTENTS

SECTION 1 Introduction

1 General

1.1 Classification

1.2 Optional Class Notation for Design Fatigue Life

1.3 Application

1.5 Internal Members

1.7 Breaks

1.9 Variations

1.11 Loading Guidance

1.13 Pressure-Vacuum Valve Setting

1.15 Protection of Structure

1.17 Aluminum Paint

3 Special Requirements for Deep Loading

3.1 General

3.3 Machinery Casings

3.5 Access

3.7 Hatchways

3.9 Freeing Arrangements

3.11 Flooding

3.13 Ventilators

5 Arrangement

5.1 General

5.3 Subdivision

5.5 Cofferdams

5.7 Gastight Bulkheads

5.9 Cathodic Protection

5.11 Ports in Pump Room Bulkheads

5.13 Location of Cargo Oil Tank Openings

5.15 Structural Fire Protection

5.17 Allocation of Spaces

5.19 Access to Upper Parts of Ballast Tanks on Double Hull

Tankers

5.21 Access to All Spaces in the Cargo Area

5.23 Duct Keels or Pipe Tunnels in Double Bottom

5.25 Ventilation

5.27 Pumping Arrangements

5.29 Electrical Equipment

5.31 Testing

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS . 2017 1

5.33 Machinery Spaces

5.35 Location of Fuel Tanks in Cargo Area

FIGURE 1

FIGURE 2 Cargo Tank Block

SECTION 2 Design Considerations and General Requirements

1 General Requirements

1.1 General

1.3 Initial Scantling Requirements

1.5 Strength Assessment – Failure Modes

1.7 Structural Redundancy and Residual Strength

3 Nominal Design Corrosion Values (NDCV)

3.1 General

TABLE 1 Nominal Design Corrosion Values (NDCV)

FIGURE 1 Nominal Design Corrosion Values (NDCV)

SECTION 3 Load Criteria

1 General

1.1 Load Components

3 Static Loads

3.1 Still-water Bending Moment

5 Wave-induced Loads

5.1 General

5.3 Horizontal Wave Bending Moment and Shear Force

5.5 External Pressures

5.7 Internal Pressures – Inertia Forces and Added Pressure

Heads 7 Nominal Design Loads

7.1 General

7.3 Hull Girder Loads – Longitudinal Bending Moments and Shear

Forces

7.5 Local Loads for Design of Supporting Structures

7.7 Local Pressures for Design of Plating and Longitudinals

9 Combined Load Cases

9.1 Combined Load Cases for Structural Analysis

9.3 Combined Load Cases for Failure Assessment

11 Sloshing Loads

11.1 General

11.3 Strength Assessment of Tank Boundary Structures

11.5 Sloshing Pressures

13 Impact Loads

13.1 Impact Loads on Bow

13.3 Bottom Slamming

13.5 Bowflare Slamming

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TABLE 1A Combined Load Cases for Yielding and Buckling Strength Formulation

TABLE 1B Combined Load Cases for Fatigue Strength Formulation TABLE 2 Load Cases for Sloshing TABLE 3 Design Pressure for Local and Supporting Members TABLE 4 Values of α TABLE 5 Values of Ai and Bi

FIGURE 1 Loading Pattern FIGURE 2 Distribution Factor mh FIGURE 3 Distribution Factor fh FIGURE 4 Distribution of hdi FIGURE 5 Pressure Distribution Function ko FIGURE 6 Illustration of Determining Total External Pressure FIGURE 7 Definition of Tank Geometry FIGURE 8 Location of Tank for Nominal Pressure Calculation FIGURE 9 Vertical Distribution of Equivalent Slosh Pressure

Head, he FIGURE 10 Horizontal Distribution of Simultaneous Slosh Pressure

Heads, hc (φs θs) or ht (φs θs) FIGURE 11 Definitions for Opening Ratio, α FIGURE 12 Opening Ratios FIGURE 13 Dimensions of Internal Structures FIGURE 14 Loading Patterns for Sloshing Loads Cases FIGURE 15 Definition of Bow Geometry FIGURE 16 Distribution of Bottom Slamming Pressure Along the

Section Girth FIGURE 17 Definition of Bowflare Geometry for Bowflare Shape

Parameter FIGURE 18 Ship Stem Angle, γ

SECTION 4 Initial Scantling Criteria

1 General

1.1 Strength Requirement

1.3 Calculation of Load Effects

1.5 Structural Details

1.7 Evaluation of Grouped Stiffeners

3 Hull Girder Strength

3.1 Hull Girder Section Modulus

3.3 Hull Girder Moment of Inertia

5 Shearing Strength

5.1 General

5.3 Net Thickness of Side Shell Plating

5.5 Thickness of Longitudinal Bulkheads

5.7 Calculation of Local Loads

5.9 Three Dimensional Analysis

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7 Double Bottom Structures

7.1 General

7.3 Bottom Shell and Inner Bottom Plating

7.5 Bottom and Inner Bottom Longitudinals

7.7 Bottom Girders/Floors

9 Side Shell and Deck – Plating and Longitudinals

9.1 Side Shell Plating

9.3 Deck Plating

9.5 Deck and Side Longitudinals

11 Side Shell and Deck – Main Supporting Members

11.1 General

11.3 Deck Transverses

11.5 Deck Girders

11.7 Web Sectional Area of Side Transverses

11.9 Minimum Thickness for Web Portion of Main Supporting

Members

11.11 Proportions

11.13 Brackets

11.15 Web Stiffeners and Tripping Brackets

11.17 Slots and Lightening Holes

13 Longitudinal and Transverse Bulkheads

13.1 Longitudinal Bulkhead Plating

13.3 Transverse Bulkhead Plating

13.5 Longitudinals and Vertical/Horizontal Stiffeners

15 Bulkheads – Main Supporting Members

15.1 General

15.3 Vertical Web on Longitudinal Bulkhead

15.5 Horizontal Girder on Transverse Bulkhead

15.7 Vertical Web on Transverse Bulkhead

15.9 Minimum Web Thickness, Proportions, Brackets, Stiffeners, Tripping Brackets, Slots and Lightening Holes

15.11 Cross Ties

15.13 Nontight Bulkheads

17 Corrugated Bulkheads

17.1 General

17.3 Plating

17.5 Stiffness of Corrugation

17.7 Bulkhead Stools

17.9 End Connections

TABLE 1 Coefficient c2 For Deck Transverses TABLE 2 Coefficients KU and KL for Side Transverses TABLE 3 Coefficient c for Vertical Web on Longitudinal Bulkheads TABLE 4 Coefficients KU and KL for Vertical Web on Longitudinal

Bulkhead

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FIGURE 1 Scantling Requirement Reference by Subsection FIGURE 2A Definitions of Spans (A) FIGURE 2B Definitions of Spans (B) FIGURE 3 Center Tank Region

FIGURE 4

FIGURE 5 Unsupported Span of Longitudinal FIGURE 6 Effective Breadth of Plating be FIGURE 7 Definitions of α3, s and bs FIGURE 8 Effectiveness of Brackets FIGURE 9 Definition of Parameters for Corrugated Bulkhead

(Tankers without Longitudinal Bulkhead at Centerline) FIGURE 10 Definition of Parameters for Corrugated Bulkhead

(Tankers with Longitudinal Bulkhead at Centerline) FIGURE 11 Corrugated Bulkhead End Connections

SECTION 5 Total Strength Assessment

1 General Requirements

1.1 General

1.3 Loads and Load Cases

1.5 Stress Components

3 Failure Criteria – Yielding

3.1 General

3.3 Structural Members and Elements

3.5 Plating

5 Failure Criteria – Buckling and Ultimate Strength

5.1 General

5.3 Plate Panels

5.5 Longitudinals and Stiffeners

5.7 Stiffened Panels

5.9 Deep Girders and Webs

5.11 Corrugated Bulkheads

5.13 Hull Girder Ultimate Strength

7 Fatigue Life

7.1 General

7.3 Procedures

7.5 Spectral Analysis

9 Calculation of Structural Responses

9.1 Methods of Approach and Analysis Procedures

9.3 3D Finite Element Models

9.5 2D Finite Element Models

9.7 Local Structural Models

9.9 Load Cases

11 Critical Areas

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FIGURE 1

FIGURE 2 Critical Areas in Transverse Web Frame FIGURE 3 Critical Areas in Horizontal Girder on Transverse

Bulkhead FIGURE 4 Critical Areas of Buttress Structure

SECTION 6 Hull Structure Beyond 0.4L Amidships

1 General Requirements

1.1 General

1.3 Structures within the Cargo Space Length

3 Forebody Side Shell Structure

3.1 Side Shell Plating

3.3 Side Frames and Longitudinals

3.5 Side Transverses and Stringers in Forebody

5 Transition Zone 7 Forebody Strengthening for Slamming

7.1 Bottom Slamming

7.3 Bowflare Slamming

FIGURE 1 Transverse Distribution of pd FIGURE 2 Definition of Spans

SECTION 7 Cargo Oil and Associated Systems

1 General

1.1 Application

1.3 Definitions

1.5 Plans and Data to be Submitted

1.7 Some General Principles

1.9 Cargo Oil Having a Flash Point Exceeding 60°C

3 Cargo Oil, Stripping and Crude Oil Washing Systems

3.1 General

3.3 Cargo Oil System

3.5 Remotely Operated Valves

5 Ballast System and Oily Water Handling

5.1 Segregated Ballast

5.3 Ballast System

7 Bilge System

7.1 General

7.3 Pump Room and Cofferdams Bilge System

7.5 Bilge Alarms

7.7 Discharge of Machinery Space Bilges into Slop Tank

9 Cargo Heating Systems

9.1 Temperature

9.3 Steam Heating System

9.5 Thermal Oil Heating System

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11 Cargo Tank Venting

11.1 General Principles

11.3 Venting Capacity

11.5 Vent Piping

11.7 Self-draining of Vent Piping

11.9 Flame Arresting Devices

11.11 Protection for Tank Overpressurization and Vacuum

11.13 Position of Pressure/Vacuum Valves

11.15 Pressure/Vacuum Valve By-pass

11.17 Vent Outlets for Large Flow Volumes

11.19 Arrangement for Combination Carriers

13 Cargo Tank Level Gauging

13.1 Cargo Tanks Fitted with Inert Gas System

13.3 Cargo Tanks not Fitted with Inert Gas System

15 Cargo Tank Purging and/or Gas-freeing

15.1 General

15.3 Vessels Fitted with Inert Gas System

15.5 Vessels without Inert Gas System

17 Ventilation and Gas Detection

17.1 Cargo Pump Room Ventilation

17.3 Precautions for Ventilation of Accommodation and Machinery

Spaces

17.5 Pipe Tunnel or Duct Keel Ventilation

17.7 Portable Gas Detectors

17.9 Gas Sampling System Installation

17.11 Ventilation for Combination Carriers

17.13 Cargo Oil Sample Locker Ventilation

19 Double Hull Space Inerting, Ventilation and Gas Measurement

19.1 Air Supply

19.3 Vessels Fitted with Inert Gas System

19.5 Provisions for Gas Measurement

20 Fixed Hydrocarbon Gas Detection System

20.1 Application

20.3 Engineering Specification

20.5 Component Requirements

21 Cargo Vapor Emission Control Systems

21.1 Application

21.3 Plans and Data to be Submitted

21.5 Cargo Transfer Rate

21.7 Vapor Collection Piping

21.9 Ship Side Vapor Connection

21.11 Pressure/Vacuum Protection of Cargo Tanks

21.13 Gauging Systems

21.15 Tank Overfill Protection

21.17 Electrical Installations

21.19 Vapor Collection for Lightering Operations

21.21 Instruction Manual

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23 Cargo Tank Protection

23.1 Inert Gas System and Deck Foam System

23.3 Crude Oil Washing

23.5 Fire Main Isolation Valve

23.7 Fireman’s Outfits

25 Inert Gas System

25.1 General

25.3 Basic Requirements

25.5 System Capacity and Oxygen Content

25.7 Type of Inert Gas

25.9 Flue Gas Isolating Valves

25.11 Flue Gas Scrubber

25.13 Blowers

25.15 Flue Gas Leakage

25.17 Gas Regulating Valve

25.19 Non-return Devices

25.21 Inert Gas Piping

25.23 Venting for Large Gas Volumes

25.25 Inerting, Purging or Gas-freeing of Empty Tanks

25.27 Pressure/Vacuum-breaking Devices

25.29 Instrumentation at Gas Blower Outlets

25.31 Monitoring of Inert Gas

25.33 Portable Detectors and Fixed Sensors

25.35 Calibration of Instruments

25.37 Alarms and Shutdowns

25.39 Instruction Manuals

25.41 Nitrogen Generator Inert Gas Systems

25.43 Inert Gas Systems for Ballast Tanks

27 Fixed Deck Foam System

27.1 General

27.3 Foam Solution Supply Rate

27.5 Foam Concentrate Quantity

27.7 Required Foam Monitor and Foam Applicator Capacities

27.9 Minimum Foam Monitor Capacity

27.11 Installation at Poop Front

27.13 Use and Minimum Capacity of Foam Applicators

27.15 Foam Main and Fire Main Isolation Valves

27.17 Simultaneous Operation

27.19 Bow or Stern Loading and Unloading

29 Cargo Pump Room Protection

29.1 Fixed Fire Extinguishing System

29.3 Required Quantity of Fire-extinguishing Medium

31 Electrical Installations

31.1 Application

31.3 Limited Use of Earthed Distribution Systems

31.5 Hazardous Areas

31.7 Air Locks

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31.9 Electrical Equipment Permitted in Hazardous Areas

31.11 Cable Installation in Hazardous Areas

31.13 Echo Sounder; Speed Log; Impressed Current System

31.15 Cargo Oil Pump Room

31.17 Pipe Tunnel or Duct Keel

33 Integrated Cargo and Ballast Systems

33.1 Application

33.3 Functional Requirements

33.5 Design Features

TABLE 1 Electrical Equipment in Hazardous Areas of Oil Carriers

FIGURE 1 Connection between Inert Gas Main and Cargo Piping FIGURE 2 Hazardous Areas on Open Deck

SECTION 7 Appendix 1 – Examples of Inerting/Gas Freeing Analysis of

Ballast Tank 1 Introduction 3 Description of the Ballast Tank

3.1 Dimensions

3.3 Transverse Bulkheads and Frames

3.5 Stringers

3.7 Girders

3.9 Discharge Pipe and Gas Outlet

3.11 Simulation Model

5 Results

5.1 Inerting

5.3 Gas-freeing

7 Conclusions

TABLE 1 Composition of Gases

FIGURE 1 Ballast Tank with Discharge Pipe FIGURE 2(a) Inerting at 0.5 hr (1800 seconds), 0.33 Atmosphere

Changes FIGURE 2(b) Inerting at 1.0 hr (3600 seconds), 0.67 Atmosphere

Changes FIGURE 2(c) Inerting at 1.5 hr (5400 seconds), 1.0 Atmosphere

Change FIGURE 2(d) Inerting at 2.25 hr (8100 seconds), 1.5 Atmosphere

Changes FIGURE 2(e) Inerting at 3.0 hr (10800 seconds), 2.0 Atmosphere

Changes FIGURE 3(a) Gas-freeing at 0.5 hr (1800 seconds), 0.33 Atmosphere

Changes FIGURE 3(b) Gas-freeing at 1.0 hr (3600 seconds), 0.67 Atmosphere

Changes

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FIGURE 3(c) Gas-freeing at 1.5 hr (5400 seconds), 1.0 Atmosphere Change

FIGURE 3(d) Gas-freeing at 2.25 hr (8100 seconds), 1.5 Atmosphere Changes

FIGURE 3(e) Gas-freeing at 3.0 hr (10800 seconds), 2.0 Atmosphere Changes

FIGURE 4 Averaged Oxygen Concentrations

APPENDIX 1 Fatigue Strength Assessment of Tankers

1 General

1.1 Note

1.3 Applicability

1.5 Loadings

1.7 Effects of Corrosion

1.9 Format of the Criteria

3 Connections to be Considered for the Fatigue Strength Assessment

3.1 General

3.3 Guidance on Locations

5 Permissible Stress Range

5.1 Assumptions

5.3 Criteria

5.5 Long Term Stress Distribution Parameter, γ

5.7 Permissible Stress Range

7 Fatigue Inducing Loads and Determination of Total Stress Ranges

7.1 General

7.3 Wave-induced Loads – Load Components

7.5 Fatigue Assessment Zones and Controlling Load

Combination

7.7 Primary Stress fd1

7.9 Secondary Stress fd2

7.11 Additional Secondary Stresses f*d2 and Tertiary Stresses fd3

9 Resulting Stress Ranges

9.1 Definitions

11 Determination of Stress Concentration Factors (SCFs)

11.1 General

11.3 Sample Stress Concentration Factors (SCFs)

13 Stress Concentration Factors Determined From Finite Element Analysis

13.1 Introduction

13.3 S-N Data

13.5 S-N Data and SCFs

13.7 Calculation of Hot Spot Stress for Fatigue Analysis of Ship

Structures

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TABLE 1 Fatigue Classification for Structural Details TABLE 1A Coefficient, C TABLE 2 Ks (SCF) Values

FIGURE 1 Basic Design S-N Curves FIGURE 2 Cn = Cn (ψ) FIGURE 3 Cut-outs (Slots) For Longitudinal FIGURE 4 Fatigue Classification for Longitudinals in way of Flat Bar

Stiffener

FIGURE 5

FIGURE 6

FIGURE 7

FIGURE 8

FIGURE 9 Doublers and Non-load Carrying Members on Deck or

Shell Plating

FIGURE 10

FIGURE 11

FIGURE 12

FIGURE 13

APPENDIX 2 Calculation of Critical Buckling Stresses

1 General 3 Rectangular Plates 5 Longitudinals and Stiffeners

5.1 Axial Compression

5.3 Torsional/Flexural Buckling

5.5 Buckling Criteria for Unit Corrugation of Transverse

Bulkhead 7 Stiffened Panels

7.1 Large Stiffened Panels

7.3 Corrugated Transverse Bulkheads

9 Deep Girders, Webs and Stiffened Brackets

9.1 Critical Buckling Stresses of Web Plates and Large Brackets

9.3 Effects of Cut-outs

9.5 Tripping

11 Stiffness and Proportions

11.1 Stiffness of Longitudinals

11.3 Stiffness of Web Stiffeners

11.5 Stiffness of Supporting Members

11.7 Proportions of Flanges and Face Plates

11.9 Proportions of Webs of Longitudinals and Stiffeners

TABLE 1 Buckling Coefficient, Ki

FIGURE 1 Net Dimensions and Properties of Stiffeners

FIGURE 2

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APPENDIX 3 Application to Single Hull Tankers 1 General

1.1 Nominal Design Corrosion Values

1.3 Load Criteria

1.5 Strength Criteria

3 Main Supporting Structures

3.1 Bottom Transverses

3.3 Bottom Girders

3.5 Side Transverses

3.7 Deck Transverses

3.9 Longitudinal Bulkhead Vertical Webs

3.11 Other Main Supporting Members

3.13 Proportions

5 Strength Assessment

5.1 General

5.3 Special Considerations

TABLE 1 Design Pressure for Local and Supporting Structures TABLE 2 Coefficient c for Side Transverse TABLE 3 Coefficients KU and KL for Side Transverses TABLE 4 Coefficient c2 For Deck Transverse TABLE 5 Coefficient c for Vertical Web on Longitudinal Bulkhead TABLE 6 Coefficients KU and KL for Vertical Web on Longitudinal

Bulkhead

FIGURE 1 Spans of Transverses and Girders

APPENDIX 4 Application to Mid-deck Tankers

1 General

1.1 Design Concepts

1.3 Design and Strength of Hull Structures

3 Load Criteria

3.1 Loading Patterns and Load Cases

3.3 Determination of Loads and Scantlings

5 Strength Criteria

5.1 Hull Girder and Structural Elements

5.3 Mid-deck Structures

7 Strength Assessment

7.1 Failure Criteria

7.3 Special Considerations

FIGURE 1 Typical Cross Section for Mid-deck Tankers FIGURE 2 Loading Pattern

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APPENDIX 5 Hull Girder Ultimate Strength Assessment of Oil Carriers 1 General 3 Vertical Hull Girder Ultimate Limit State 5 Hull Girder Ultimate Bending Moment Capacity

5.1 General

5.3 Physical Parameters

5.5 Calculation Procedure

5.7 Assumptions and Modeling of the Hull Girder Cross-section

5.9 Stress-strain Curves σ-ε (or Load-end Shortening Curves)

FIGURE 1 Bending Moment – Curvature Curve M-κ FIGURE 2 Dimensions and Properties of Stiffeners FIGURE 3 Example of Defining Structural Elements FIGURE 4 Example of Stress Strain Curves σ-ε

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P A R T S e c t i o n 1 : I n t r o d u c t i o n

C H A P T E R 1 Vessels Intended to Carry Oil in Bulk (150 meters

(492 feet) or more in Length)

S E C T I O N 1 Introduction

1 General

1.1 Classification (1 July 2001)

In accordance with 1-1-3/3 and 1-1-3/25, the classification notation À A1 Oil Carrier, SH, SHCM is to be assigned to vessels designed for the carriage of oil cargoes in bulk, and built to the requirements of this Chapter and other relevant sections of the Rules. As used in the Rules, the term ‘‘oil’’ refers to petroleum products having flash points at or below 60°C (140°F), closed cup test, and specific gravity of not over

1.05. Vessels intended to carry fuel oil having a flash point above 60°C (140°F), closed cup test, and to receive classification À A1 Fuel Oil Carrier, SH, SHCM are to comply with the requirements of this Chapter and other relevant sections of the Rules, with the exception that the requirements for cofferdams, gastight bulkheads and aluminum paint may be modified.

1.2 Optional Class Notation for Design Fatigue Life (2003)

Vessels designed and built to the requirements in this Chapter are intended to have a structural fatigue life of not less than 20 years. Where a vessel’s design calls for a fatigue life in excess of the minimum design fatigue life of 20 years, the optional class notation FL (year) will be assigned at the request of the applicant. This optional notation is eligible, provided the excess design fatigue life is verified to be in compliance with the criteria in Appendix 1 of this Chapter, “Fatigue Strength Assessment of Tankers”. Only one design fatigue life value is published for the entire structural system. Where differing design fatigue life values are intended for different structural elements within the vessel, the (year) refers to the least of the varying target lives. The ‘design fatigue life’ refers to the target value set by the applicant, not the value calculated in the analysis.

The notation FL (year) denotes that the design fatigue life assessed according to Appendix 1 of this Chapter is greater than the minimum design fatigue life of 20 years. The (year) refers to the fatigue life equal to 25 years or more (in 5-year increments) as specified by the applicant. The fatigue life will be identified in the Record by the notation FL (year); e.g., FL(30) if the minimum design fatigue life assessed is 30 years.

1.3 Application

1.3.1 Size and Proportion (1997)

The requirements contained in this Chapter are applicable to double hull tankers intended for unrestricted service, having lengths of 150 meters (492 feet) or more, and having parameters within the range as specified in 3-2-1/1.

1.3.2 Vessel Types

The equations and formulae for determining design load and strength requirements, as specified in Section 5C-1-3 and Section 5C-1-4, are applicable to double hull tankers. For mid-deck or single hull tankers, the parameters used in the equations are to be adjusted according to the structural configurations and loading patterns outlined in Appendix 5C-1-A3 or Appendix 5C-1-A4. The strength assessment procedures and the failure criteria, as specified in Section 5C-1-5, are applicable to all types of tankers.

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Part 5C Specific Vessel Types Chapter 1 Vessels Intended to Carry Oil in Bulk (150 m (492 ft) or more in Length) Section 1 Introduction 5C-1-1

Double hull tanker is a tank vessel having full depth wing water ballast tanks or other non-cargo spaces, and full breadth double bottom water ballast tanks or other non-cargo spaces throughout the cargo area, intended to prevent or at least reduce the liquid cargo outflow in an accidental stranding or collision. The size and capacity of these wing/double bottom tanks or spaces are to comply with MARPOL 73/78 and national Regulations, as applicable.

Mid-deck tanker: Refer to 5C-1-A4/1.1, “Design Concepts”.

Single hull tanker is a tank vessel that does not fit the above definitions of Double hull tanker or Mid-deck tanker.

1.3.3 Direct Calculations

Direct calculations with respect to the determination of design loads and the establishment of alternative strength criteria based on first principles will be accepted for consideration, provided that all the supporting data, analysis procedures and calculated results are fully documented and submitted for review. In this regard, due consideration is to be given to the environmental conditions, probability of occurrence, uncertainties in load and response predictions and reliability of the structure in service. For long term prediction of wave loads, realistic wave spectra covering the North Atlantic Ocean and a probability level of 10-8 are to be employed.

1.3.4 SafeHull Construction Monitoring Program (1 July 2001)

For the class notation SH, SHCM, a Construction Monitoring Plan for critical areas, prepared in accordance with the requirements of Part 5C, Appendix 1, is to be submitted for approval prior to commencement of fabrication. See Part 5C, Appendix 1 “SafeHull Construction Monitoring Program”.

1.5 Internal Members (2002)

1.5.1 Section Properties of Structural Members (1 July 2008)

The geometric properties of structural members may be calculated directly from the dimensions of the section and the associated effective plating (see 3-1-2/13.3 or 5C-1-4/Figure 6, as applicable).

For structural member with angle θ (see 5C-1-1/Figure 1) between web and associated plating not less than 75 degrees, the section modulus, web sectional area and moment of inertia of the “standard” (θ = 90 degrees) section may be used without modification. Where the angle θ is less than 75 degrees, the sectional properties are to be directly calculated about an axis parallel to the associated plating (see 5C-1-1/Figure 1).

For longitudinals, frames and stiffeners, the section modulus may be obtained by the following equation:

SM = αθSM90 where αθ = 1.45 – 40.5/θ

SM90 = the section modulus at θ = 90 degrees

The effective section area may be obtained from the following equation:

A = A90 sin θ where

A90 = effective shear area at θ = 90 degrees

1.5.2 Detailed Design

The detailed design of…