Section 3 Structural configuration
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules for the Application of Sandwich Panel Construction to Ship Structure, July 2022 - Chapter 1 General - Section 3 Structural configuration

Section 3 Structural configuration

Parent topic: Chapter 1 General

3.1 General

3.1.1 Requirements are given in these Rules for ships constructed either fully or partly of sandwich panels.

3.1.2 This Section describes a basic structural configuration as set out in Ch 1, 3.2 New construction for new construction and Ch 1, 3.3 Overlay construction for overlay construction.

3.1.3 Primary members support the sandwich panels.

3.1.4 These provisions do not preclude the fitting of additional girders, transverses or floors in order to maintain adequate aspect ratio, see Ch 4, 2.1 General.

3.1.5 Temperature control pressure relief plugs are in general fitted to the steel sandwich panels. The size, number and location are to be such that they do not compromise the structural capability of the sandwich construction.

3.2 New construction

3.2.1 This Section describes a basic structural configuration for new construction as shown in Figure 1.3.1 Diagrammatic arrangement of a typical sandwich new construction (for illustration only and not to scale).

3.2.2 The main components of a structural configuration employing sandwich construction are:

  1. Top plate.

  2. Bottom plate.

  3. Elastomer core.

  4. Primary member, supporting the panel.

  5. Perimeter bar, welded to the bottom plate to define the perimeter edges of the injection cavities directly above supporting members (primary members, floors, girders, bulkheads).

  6. Temperature control pressure relief plugs, where fitted, see also Ch 1, 3.1 General 3.1.5.

3.3 Overlay construction

3.3.1 This Section describes a basic structural configuration for overlay construction as shown in Figure 1.3.2 Diagrammatic arrangement of a typical sandwich overlay construction (for illustration only and not to scale).

3.3.2 The main components of a structural configuration employing overlay construction are:

  1. New steel top plate (becomes the new wearing surface).

  2. Elastomer core.

  3. Existing steel plate including any primary and secondary stiffeners attached to it.

  4. Perimeter bars (flat bars). Attached to the existing plating directly above transverse and longitudinal supporting structure. Size and number of perimeter bars dependent on the cavity size and not necessarily located above every supporting structure.

  5. Temperature control pressure relief plugs, where fitted, see also Ch 1, 3.1 General 3.1.5.

Figure 1.3.1 Diagrammatic arrangement of a typical sandwich new construction (for illustration only and not to scale)

Figure 1.3.2 Diagrammatic arrangement of a typical sandwich overlay construction (for illustration only and not to scale)
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