1 IACS Common Structural Rules INTERTANKO LATIN AMERICAN PANEL Rio de Janeiro, 25 April 2006

2 Aim To develop a set of unified Rules and Procedures for the determination of the structural requirements for oil tankers and bulk carriers

3 Objective To eliminate competition between class societies with regard to structural requirements and standards To ensure that a vessel meeting these new standards will be recognised by industry as being at least as safe and robust as would have been required by any of the existing Rules To fully embrace the intentions of the anticipated IMO requirements for goal based new construction standards

4 Why new rules? Today’s ships are satisfactory, however, ship structural Rules need improvement The ship rules do not have a clear and rational link between requirements for newbuildings and operation The ship rules are not in line with state-of-the-art in safety regulations for other segments, e.g., offshore, nuclear, aviation The ship rules have not kept up with design development in terms of use of technology

5 Aspects associated with “robustness” and “durability” deal with items that change over the life of the vessel, such as: Corrosion – ensuring that corrosion is addressed using clear corrosion margins that are linked to the original strength assessment Fatigue – ensuring that fatigue is assessed using a harsh environment and sufficient design life (25 years in the North Atlantic) Review of structural components for relevant assessment criteria (or failure modes), such as: Material yielding, compressive buckling, member tripping, etc. Addressing “ robustness ”

6 IACS Common Structural Rules CSR for Bulk Carriers BV, CCS, GL, KR, NK, RINA & RS Complete set of Structural Rules for SSS and DSS Bulk Carriers Length greater than or equal to 90m CSR for Tankers LRS, ABS & DNV Complete Set of Structural Rules for Double Hull Oil Tankers Length greater than or equal to 150m

7 Features of the new Common Structural Rules Rules are to result in common scantling requirements Net scantling approach includes a clear link between newbuilding strength checks and in- service gauging review standards Include coating standard criteria Fatigue standard enhanced to include exposure to North Atlantic environment with minimum life of 25 years Includes the results from industry input and feedback

8 CSR Features - Net Scantling Approach Predicted corrosion in 2.5 years (0.5 mm) Required Net Thickness Corrosion Addition Design Required Renewal Thickness Wastage Allowance In Service Annual Thickness Measurements includes link between newbuilding and in-service standards

9 As-built and renewal thicknesses to be indicated in the vessel drawings Renewal values given in millimeters (not percentage of as-built) Renewals cover general corrosion as well as local pitting, grooving and edge corrosion CSR Features – Renewal Criteria

10 Noted work being undertaken by the IMO to amend SOLAS Regulation II-1/3-2 Introduced a “Performance Standard for Protective Coatings for Ballast Tanks and Void Spaces” into the CSRs CSRs tied to the IMO process Will be mandatory for ships contracted for construction on or after the date of the IMO adoption of the amended SOLAS Regulation II- 1/3-2 This requirement will effectively advance the date of implementation for tankers and bulk carriers (adoption is not expected before December 2006 at the earliest) CSR Features – Coating Performance Standard

11 IMO Coating Performance Standards (CPS) Earliest Implementation Schedule for SOLAS and IACS CSR Revised SOLAS II-1/3-2 entry into force mandating CPS for ships with keel laid on/after 01 Jul 08 Draft CPS (DE 49) SOLAS XII/6.3 enters into force recommending CPS for Bulk Carriers Approval of CPS and SOLAS II-1/3-2 (MSC 81) Adoption of CPS and Revised SOLAS II-1/3-2 (MSC 82) IACS CSR requires CPS for ships contracted for construction on/after the adoption date of the Revised SOLAS II-1/ (Jan) 2006 (Jan) 2008 (Jan)

12 IACS PR 29 – Contract date and sister vessels

13 IACS PR 29 – Contract date and sister vessels

14 Where to get more information ABS Support for CSR : CSR Tanker: CSR Bulk Carrier:

15 Maintenance Plan IACS Hull Panel Inquiry replies, Rule amendments, interpretations Consistent implementation Tanker and Bulk Carrier Teams Technical expertise Harmonization Plan One year feedback period before long term harmonization Three years of harmonization work One year for implementation Full harmonization in five years from implementation CSR Maintenance and Harmonization

16 CSR Tankers

17 CSR/Tanker - Table of Contents Section Topic Introduction Underlying Principles Rules Applications Basic Information Structural Arrangement Material and Welding Loads Scantling Requirements Section Topic A B C D Design Verification Buckling and Ultimate- Strength General Requirements Renewal Criteria (SiO) Hull Girder Ultimate Strength Structural Strength Assessment Fatigue Strength Assessment Buckling Strength Assessment

18 Ship Details

19 Summary Approx. steelweight changes As-built cargo block steelweight in Tonnes JTP compliant cargo block steelweight in Tonnes Tonnes increase Percentage increase VLCC % VLCC % (1) SUEZMAX % (1) AFRAMAX % PANAMAX % PRODUCT % PRODUCT % (1) plating has not been optimised