Clasification Society Rules and Regulations - Rules and Regulations for the Classification of Offshore Units, January 2016 - Part 4 STEEL UNIT STRUCTURES - Chapter 3 Structural Design - Section 2 Design concepts
Section 2 Design concepts
2.1 Elastic method of design
2.1.1 In general, the approval of the primary structure of the unit will be based on the elastic method of design and the permissible stresses in the structure are to be based on the minimum factors of safety defined in Pt 4, Ch 5 Primary Hull Strength When specifically requested, LR will consider other design methods.
2.2 Limit state method of design
2.2.1 When the limit state method of design is proposed for the structure, the design methods, load combinations and partial factors are to be agreed with LR.
2.3 Plastic method of design
2.3.1 When the plastic method of design based on the ultimate strength is proposed for the structure, the load factors are to be in accordance with an acceptable Code of Practice, see Pt 3, Ch 17 Appendix A Codes, Standards and Equipment Categories.
2.4 Fatigue design
2.4.1 All units are to be capable of withstanding the fatigue loading to which they are subjected. The fatigue design requirements are given in Pt 4, Ch 5, 5 Fatigue design.
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