Section 5 Typical design details

5.1 General

5.1.1 Typical design details are provided in this Section.

5.1.2 The design detail should be arranged to transfer loads effectively into the surrounding structure, whilst maintaining acceptable stress levels.

5.1.3 Care is to be taken to ensure that structural continuity is maintained, the detail is smooth and proper alignment is achieved. Special care is to be taken in the design and positioning of perimeter bars. Unless otherwise agreed the perimeter bar should be positioned above stiffening members.

5.2 Application

5.2.1 The detail designs provided in this Section are applicable to all ship types covered by these Rules.

5.2.2 Where suggested values are indicated regarding geometries or scantlings, these are given as guidance.

5.3 Alternative arrangements

5.3.1 In cases where detailed requirements are not given, specific solutions are to be based on the principles of this Section and submitted for appraisal.

5.3.2 Alternative structural arrangements may be acceptable provided it can be demonstrated through a Finite Element Assessment that a satisfactory performance will be maintained.

5.4 Typical design details

5.4.1 Design details for overlay construction are in general to be in accordance with Table 2.5.1 Overlay construction design details for structural items.

5.4.2 Design details for sandwich new construction are in general to be in accordance with Table 2.5.4 Design details for new construction

Table 2.5.1 Overlay construction design details for structural items

5.5 Primary steel support members

5.5.1 The scantling requirements for primary steel support members are given in Ch 4 Design Basis and Scantling Determination of Primary Structure.

Table 2.5.2 Design details for hull outfitting items

Table 2.5.3 Design details for fabrication

Note 1. Location of the perimeter bar relative to existing longituindal or transverse member can be varied according to the design of the overlay.

Note 2. Generally tack welding is not to be carried out on higher tensile steel plates.

Note 3. Welding to be as required in Ch 2, 6 Welding.

Table 2.5.4 Design details for new construction





Note 1. Chamfered preparation on perimeter bar to be at least the thickness of the steel face plates. Note 2. Weld between face plates and perimeter bar to be made as part of panel pre-fabrication, prior to joining panels. Note 3. Only in way of pillar bulkheads. Note 4. If the angle is less than 45°, chamfer is required. Note 5. In general, the root gap is to be equal to the thickness of the largest adjacent faceplate thickness. Note 6. A taper of not less than 4:1 is to be adopted and additional stiffening may be required when utilised in way of hull girder. Not permitted for transverse butts in the strength deck and bottom plating.