Section 1 General
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Offshore Units, July 2022 - Part 4 Steel Unit Structures - Chapter 12 Fatigue – S-N Curves, Joint Classification and Stress Concentration Factors - Section 1 General

Section 1 General

1.1 Application

1.1.1 This Appendix contains details of acceptable design S-N curves and joint classification. The details contained in this Appendix take due account of the fatigue data published in the UK HSE Guidance Notes for Design, Construction and Classification of Offshore Installations, 4th edition, 1990.

1.1.2 All tubular joints are assigned Class T. Other types of joints are assigned Class B, C, D, E, F, F2, G or W depending upon:
  • geometric arrangements;
  • direction of applied stress; and
  • method of fabrication and inspection.

1.1.3 Details of the design S-N curves are given in Pt 4, Ch 12, 2 Fatigue design S-N curves, joint classifications are given in Pt 4, Ch 12, 3 Fatigue joint classification.

1.1.4 Guidance on the determination of global stress concentration factors is given in Pt 4, Ch 12, 4 Stress concentration factors.

1.1.5 Other methods may be used after special consideration and agreement with LR. Detailed proposals are to be submitted.


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