5 Fatigue Limit States
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Resolutions - Maritime Safety Committee - Resolution MSC.370(93) – Amendments to The International Code for The Construction and Equipment of Ships Carrying Liquefied Gases In Bulk (IGC Code) – (Adopted on 22 May 2014) - Annex - Amendments to The International Code for The Construction and Equipment of Ships Carrying Liquefied Gases In Bulk (IGC Code) - Appendix 5 – Standard for the Use of Limit State Methodologies in the Design of Cargo Containment Systems of Novel Configuration - 5 Fatigue Limit States

5 Fatigue Limit States

  5.1 Fatigue design condition as described in section 4.18.2 of this Code shall be complied with as applicable depending on the cargo containment system concept. Fatigue analysis is required for the cargo containment system designed under section 4.27 of this Code and this standard.

  5.2 The load factors for FLS shall be taken as 1.0 for all load categories.

  5.3 Consequence class factor γC and resistance factor γR shall be taken as 1.0.

  5.4 Fatigue damage shall be calculated as described in sections 4.18.2.2 to 4.18.2.5 of this Code. The calculated cumulative fatigue damage ratio for the cargo containment systems shall be less than or equal to the values given in table 3.

Table 3 Maximum allowable cumulative fatigue damage ratio

  Consequence class
Cw Low Medium High
  1.0 0.5 0.5footnote

  5.5 Lower values may be fixed by the Administration or recognized organization acting on its behalf, for example for tank structures where effective detection of defect or crack cannot be assured, and for ships carrying more hazardous cargo.

  5.6 Crack propagation analyses are required in accordance with sections 4.18.2.6 to 4.18.2.9 of this Code. The analysis shall be carried out in accordance with methods laid down in a standard recognized by the Administration or recognized organization acting on its behalf.

Parent topic: Appendix 5 – Standard for the Use of Limit State Methodologies in the Design of Cargo Containment Systems of Novel Configuration
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