Section 4 Rule structural concept

4.1.1 These Rules are formulated to provide for scantling derivation for designs where the sandwich panel forms the flange of the primary members, see Pt 3, Ch 3, 3.2 Geometric properties of section of the Rules and Regulations for the Classification of Ships, July 2022. Details of the requirements are given in Ch 3 Design Basis for Panels and Ch 4 Design Basis and Scantling Determination of Primary Structure.

4.1.2 Scantling requirements in respect of miscellaneous items of structure such as local foundations, base plates, insert plates, bollards, etc. are not specifically indicated within these Rules. However, the acceptance of such items will be specially considered on the basis of experience, good practice and direct calculation where appropriate.

4.2.1 The scantling derivation of a steel sandwich panel is based on an equivalent strength approach whereby the strength of the steel sandwich panel is to be equivalent to a conventionally framed steel panel construction, see Ch 3 Design Basis for Panels and Ch 4 Design Basis and Scantling Determination of Primary Structure for the thickness requirements.

4.2.2 Where steel sandwich panel construction is to be used as part of the continuous longitudinal material contributing to longitudinal strength, the structure is also to be in accordance with Pt 3, Ch 4 Longitudinal Strength of the Rules and Regulations for the Classification of Ships, July 2022.