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Chapter 20 Spectral Fatigue Analysis and Design 389
20.5.6 Drawing Verification
Design drawings corresponding to this design task should be verified according to design
results, for correctness and acceptability. Non-conforming drawings are to be revised and/or
documented depending on their acceptability in the task technical report.
20.6 Classification Society Interface
20.6.1 Submittal and Approval of Design Brief
The design brief is submitted to the classification society for review, comments, and approval.
The classification society’s comments are to be incorporated into the design brief and the
revised design brief will be reissued. If necessary, the analysis should be repeated to verify and
validate the analysis results and design brief revisions.
20.6.2 Submittal and Approval of Task Report
A technical task report is issued after the analysis is completed to document the analysis and
design results. This report should follow the analysis methodology documented in the design
brief and discuss any variations from the design brief. The task report includes supporting
information, hand calculations and computer output.
This task report and supplemental calculations are submitted to the classification society for
review, comment, and approval and will be available to the post-design personnel for
reference during fabrication.
20.6.3 Incorporation of Comments from Classification Society
Comments on the design brief and the task report should be incorporated into the applicable
revised document. The revised document is issued for record and final approval, if required.
20.7 References
1. ABS (2002), “Rule for Building and Classing Steel Vessels”, American Bureau of
Shipping.
2. API (1997), “Recommended Practice for Planning, Designing, and Constructing Tension
Leg Platforms”, API Recommended Practice 2T (RP 2T), First Edition, American
Petroleum Institute.
3. API (2001), “API RP 2FPS, Recommended Practice for Planning, Designing and
Constructing Floating Production Systems”, First Edition.
4. AWS (1997), “AWS Structural Welding Code - Steel, AWS Dl.1-96”, American
Welding Society.
5. Bai, Y. (2001), “Pipelines and Risers”, Elsevier Ocean Engineering Book Series, Vol. 3.
6. BSI (1993), “BSI 7608-Code for Practice for Fatigue Design and Assessment of Steel
Structures”, British Institute of Standards.
7. DNV (2000), “RP-C203, Fatigue Strength Analysis of Offshore Steel Structures”, Det
Norske Veritas.