Tripartite meetingBeijing, 8-9 November 2008

Status and Early Experience of CSRs

Gary HornDirector Rules & Standards, ABS

IACS Hull Panel Chair

Update on CSR

• History of the Common Structural Rules

– Adoption January 2006

– Implementation April 2006

– One year feedback period before developing harmonization plan

– Currently ongoing:• CSR Maintenance

• CSR Harmonization

IACS Organisation for CSR

IACS Council

SG/CSR

Hull Panel Project Management TeamCSR Harmonization

CSR Secretariat

Project Teams(Including Cross Check Teams)

Project Teams(Including Development Projects)

Technical review

Tripartite meetingBeijing, 8-9 November 2008

Update on CSR Maintenance

Adopted CSR Rule Changes and Corrigenda

Tanker:– Rule Change Notice 1 (Sept 2006) – Corrigenda 1 (Apr 06)– Corrigenda 2 (July 06)– Corrigenda 3 (Nov 2007) – Rule Change Notice 2 (Feb 2008) – Corrigenda 4 (June 2008)

Bulk Carrier:– Corrigenda 1 (May 06)– Corrigenda 2 (Jan 07)– Corrigenda 3 (July 07)– Corrigenda 4 (Sept 07) – Rule Change Notice 1 (Nov 2007)– Rule Change Notice 2 (Feb 2008)– Corrigenda 5 (May 2008)– Rule Change Notice 3 (12 Sept 2008)

Tankerconsolidated

version1 July 2008

Bulk Carrierconsolidated

version1 July 2008

Current CSR Rule Change Proposals

Tanker:– RCP 3

•Accepted by HP

•1st round of TC and Industry Group review (July – Aug 2008)

•Comments incorporated or addressed by CSR PT2

•2nd round of TC and Industry Group review starting now (Oct – Nov 2008)

•Publish January 2009

•Effective date 1 July 2009

Current CSR Rule Change Proposals

Bulk Carrier:– RCP 4

•Accepted by HP

•1st round of TC and Industry Group review (July – Aug 2008)

•Comments incorporated or addressed by CSR PT1

•2nd round of TC and Industry Group review starting now (Oct – Nov 2008)

•Publish January 2009

•Effective date 1 July 2009

Revision History – Tracking Database

IACS CSR Tracking Database is ready to go on-line

•  Objective

- Provide users with a searchable database on CSR revision history with supporting materials.

- Provide users easy and quick access to a full and up-to-date history of a particular requirement

• Test and development:

It has been tested since Jan 2008, and is now ready to go on-line to general public as a development version.

• Web link: www.iacs-csrtrack.org.uk

Revision History – Tracking Database

• What is published:

- Full History of Revision (Rule Changes and Corrigenda) on a paragraph by paragraph basis;

- Date of approval, what was amended/corrected, Technical Background, implementation date

•  Search Facility

Search and sort out rule change text by Rule Change Notice/Corrigenda No., approval date, or effective date etc.

• Industry and interested users are invited to contact the IACS CSR Secretariat (csr@iacs.org.uk) for log-in IDs and a User Manual.

IACS CSR Knowledge Centre (KC) activity

(as of 31 July 2008)

• KC since 1 August 2006 to capture Questions & Answers, Common Interpretations, and Rule Change requests

• 657 entries in the database - 214 relating to the Tanker Rules, 435 to the Bulker Rules and 8 to both sets of Rules

• 550 of the items have been completed (195 tanker, 349 bulker and 6 both)

• 222 items led to a rule change being requested (around 50% editorial changes)

Types of changes

Category I Corrigenda; corrections of Category I do not affect the technical background nor intention of the requirement, they are not controversial, i.e. they correct an obvious error.

Category II Rule changes; which possibly affect scantling requirements or the technical background.

IACS PR32 – CSR Maintenance

IACS PR32 - CSR Maintenance

Rule Change Proposals arereviewed by Members’ Technical Committees:

Based on the input from the first review, Rule Change Proposals may be amended and are sent back to the Technical Committees for second review.

IACS Council decisions regarding PR 32 implementation:

Hull Panel should be conservative about issuing Corrigenda. “Corrections” to the Rules which require additions to the Rule text must be dealt as Rule Changes.

PR 32 Annex A, Attachment 2, Para 6:

• Permsec should publish the approved simple Answers to Questions, Clarifications and CIs, upon confirmation by the PT Manager, on the IACS CSR Website.

PR 32 Annex A, Attachment 2, Para 7:

• A summary report on Q&As and CIs is produced twice a year and sent to Project Teams dealing with Rule maintenance.

• The Project Teams carry out periodical review, at least twice a year, of the Q&A and CIs to determine the need for Rule changes.

IACS PR32 - CSR Maintenance

Cross Check Project Status

Prescriptive Rules Cross Check

and

FEA Cross Check

•All 10 IACS members involved

•First phase of the Cross Check for Tanker and Bulk Carrier calculations has been completed

•The results provide a benchmark for the societies to verify their calculation tools

•The results indicate reasonable coherence

•Common interpretations and/or Rule changes will be needed to clarify the application of the Rules

•Additional work will be carried out to cover more ships

Tripartite meetingBeijing, 8-9 November 2008

Update on CSR Harmonization

Harmonized Structural Rules for Oil Tankers and Bulk Carriers

•Deliverables

– Common Rules covering Oil tankers and bulk carriers

– 3 booklets:

•Common parts for both types

•Specific part applicable to Oil Tankers

•Specific part applicable to Bulk Carriers

•Issue of complete harmonized rule for stakeholder comment Dec 2011

General Action Plan for CSR Harmonisation

• Items identified at CSR release for long term harmonisation:

– Wave loads

– Fatigue

– Finite element analysis

– Buckling

– Prescriptive requirements

• Comments from ICS:

– Quartering Sea

– Corrosion

– Welding

– FEM analysis

Project Teams Established in 2008

HPT 1 Wave Loads

Harmonization of the LoadsIncludes re-examination of the environmental data and quartering sea condition for bulk carriers

HPT 2 Buckling

Harmonization of Buckling calculation methods for prescriptive and FEM

HPT 3 FEAHarmonization of FEM calculation methods

HPT 4 Corrosion

Re-examination of data

HPT 5 Welding

Review of welding requirement especially in way of high stress areas

HPT 6 Fatigue assessment of hatch corners of Bulk Carriers under Quartering Sea for updating CSR BC

HPT 7 Ship in Service Criteria

Project Status

HPT 1 Wave Loads

Detail action plan and work schedule defined

Comparison of 2 CSR Rules in progress for the motions, accelerations and the outside pressure

Sub-PT for Re-Examination of the environmental data

For quartering sea : connection btwn HPT1 & HPT6

HPT 2 Buckling

Detail action plan and work schedule defined

Work in progress (slenderness and prescriptive formulae)

HPT 3 FEA

Detail action plan and work schedule defined

Rule comparison in progress

Project Status

HPT 4 Corrosion1 Detail action plan defined

HPT 5 Welding

Detail action plan and work schedule defined

1 IACS will welcome corrosion data from ICS and other industry associations for analysis with the current IACS data.

Project Status

HPT 6 Fatigue of Hatch Corner under quartering sea in CSR BC

3 different models of BC-A investigated with respect to the structural response under pure torsion.

Comparison made between the structural response of the global (Complete ship) models and 3-Cargo-Hold-models.

Boundary conditions for the 3-Cargo-Hold-model are investigated

HPT 7 Ship in Service

Work in progress under supervision of Survey Panel

Thank you

Status and Early Experience of CSRs

Gary HornDirector Rules & Standards, ABS

IACS Hull Panel Chair