Section 1 Plans and particulars

1.1.1 The following plans and particulars are to be submitted for appraisal, where applicable:

1. General arrangement of ACV and principal particulars.

2. Weights and centres of gravity of the hull, consumables, stores and payload.

3. Design performance parameters (gross displacement mass vs. speed vs. wave height).

4. Load-carrying platforms and decks.

5. Main longitudinal girders and beams.

6. Main transverse and diagonal girders, frames and beams.

7. Watertight bulkheads and integral buoyancy tanks.

8. Integral fuel and water tanks.

9. Bottom and side shell plating.

10. Webs or other arrangements to resist impact loads.

11. Machinery foundations.

12. Duct openings and framing.

13. Side bodies.

14. Superstructure and deck-house.

15. Closing arrangements.

16. Air rudders and propeller ducts.

17. General arrangement and attachments of propeller ducts, pylons and air propellers.

18. Lift fan inlet and outlet arrangements.

19. General arrangement and attachments of skirts.

20. General arrangements and attachments of external fuel and water tanks.

21. Vehicle and cargo decks (including tie-down fittings).

22. Crane foundation.

23. Loading ramp.

24. Anchoring and mooring equipment.

25. Welding details.

All plans are to be presented in a clear and unambiguous manner with sufficient detail to avoid misinterpretation.

1.2.1 Scantlings of ACVs require special consideration and calculations are to be submitted in support of the main structural plans and data given in Ch 3, 1.1 Plans and particulars to be submitted. The supporting calculations are generally to be contained in a report which is to include the following, where applicable:

1. Lists of plans used, including dates and versions.

2. Description of structural models, including all modelling assumptions.

3. Plots to demonstrate correct structural modelling and assigned properties.

4. Details of material properties used.

5. Details of all load cases.

6. Design criteria.

7. Buckling analysis.

8. Results showing compliance, or otherwise, with the design criteria.

9. Proposed amendments to structure where necessary, including revised assessment of stresses and buckling capabilities.

1.2.2 Structural loads are to be calculated in accordance with this document. Alternatively, loads may be derived through direct calculations. All such calculations are to be submitted for examination.

1.2.3 The scantlings of structurally complicated ACVs or design aspects may require to be supplemented by detailed structural analysis using the finite element method or equivalent. These supplementary calculations are to be discussed with LR prior to submission.

1.2.4 Generally, loads and stresses are to be expressed in kN and N/mm² respectively. Limiting stress coefficients for bending, shear and equivalent stress are given in Ch 3, 10 Limiting stress coefficients for both local and global loads. However, buckling considerations may result in limiting stress coefficients lower than these values.

1.2.5 The responsibility for error-free specification and input of program data and the subsequent correct transposal of data rests with the designer.

1.3.1 Requirements for standard designs are given in Pt 3, Ch 1, 5.3 Standard designs of the SSC Rules.