DNV Ship rules Pt.3 Ch.1 - Hull Structural Design, Ships ...

1 rules FOR CLASSIFICATION OF. Ships PART 3 CHAPTER 1. NEWBUILDINGS. hull AND EQUIPMENT MAIN CLASS. hull Structural design , Ships with Length 100 metres and above JANUARY 2012. The electronic pdf version of this document found through is the officially binding version The content of this service document is the subject of intellectual property rights reserved by Det Norske Veritas AS (DNV). The user accepts that it is prohibited by anyone else but DNV and/or its licensees to offer and/or perform classification, certification and/or verification services, including the issuance of certificates and/or declarations of conformity, wholly or partly, on the basis of and/or pursuant to this document whether free of charge or chargeable, without DNV's prior written consent. DNV is not responsible for the consequences arising from any use of this document by others.

2 DET NORSKE VERITAS AS. FOREWORD. DET NORSKE VERITAS (DNV) is an autonomous and independent foundation with the objectives of safeguarding life, property and the environment, at sea and onshore. DNV undertakes classification, certification, and other verification and consultancy services relating to quality of Ships , offshore units and installations, and onshore industries worldwide, and carries out research in relation to these functions. The rules lay down technical and procedural requirements related to obtaining and retaining a Class Certificate. It is used as a contractual document and includes both requirements and acceptance criteria. Det Norske Veritas AS January 2012. Any comments may be sent by e-mail to For subscription orders or information about subscription terms, please use Computer Typesetting (Adobe Frame Maker) by Det Norske Veritas If any person suffers loss or damage which is proved to have been caused by any negligent act or omission of Det Norske Veritas, then Det Norske Veritas shall pay compensation to such person for his proved direct loss or damage.

3 However, the compensation shall not exceed an amount equal to ten times the fee charged for the service in question, provided that the maximum compensation shall never exceed USD 2 million. In this provision "Det Norske Veritas" shall mean the Foundation Det Norske Veritas as well as all its subsidiaries, directors, officers, employees, agents and any other acting on behalf of Det Norske Veritas. rules for Ships , January 2012. Changes Page 3. CHANGES. General The present edition of the rules includes additions and amendments approved by the Executive Committee as of November 2011, and supersedes the July 2011 edition of the same chapter, including later amendments. The rule changes come into force as described below. Text affected by the main rule changes in this edition is highlighted in red colour. However, where the changes involve a whole chapter, section or sub-section, only the title may be in red colour.

4 This chapter is valid until superseded by a revised chapter. Main changes coming into force 1 July 2012. Materials New C300 Steel sandwich panel construction Special Requirements - Additional Class Class notation CSA: Editorial changes in E104, E601 and E700. Corrections and Clarifications In addition to the above stated rule requirements, a number of corrections and clarifications have been made to the existing rule text. DET NORSKE VERITAS AS. rules for Ships , January 2012. Contents Page 4. CONTENTS. Sec. 1 General Requirements .. 11. A. 11. A 100 11. A 200 Class notations .. 11. B. Definitions .. 11. B 100 Symbols .. 11. B 200 Terms .. 12. B 300 ship 15. C. Documentation .. 15. C 100 Plans and particulars .. 15. C 200 Specifications and calculations .. 16. C 300 Specific purpose documentation .. 16. D. Ships Built for In-Water Survey of the ship 's Bottom and Related Items.

5 16. D 100 16. D 200 17. D 300 Markings of ship 's sides and bottom .. 17. D 400 17. D 500 Tailshaft .. 17. D 600 Thrusters .. 17. Sec. 2 Materials .. 18. A. General .. 18. A 100 18. A 200 Material certificates .. 18. B. hull Structure Steel .. 18. B 100 18. B 200 Material designations and classes .. 18. B 300 Basic 19. B 400 Requirements for low air 20. B 500 Material at 20. C. Alternative Structural Materials .. 21. C 100 Aluminium .. 21. C 200 Stainless steel .. 21. C 300 Steel sandwich panel construction .. 22. D. Corrosion Additions for Steel Ships .. 22. D 100 22. D 200 Corrosion 22. D 300 Class notation ICM (Increased Corrosion Margin).. 22. Sec. 3 design Principles .. 25. A. Subdivision and Arrangement .. 25. A 100 25. A 200 Definitions.. 25. A 300 Number of transverse watertight bulkheads.. 25. A 400 Position of collision 25. A 500 Height of watertight 27.

6 A 600 Opening and closing 27. A 700 Cofferdams and tank 27. A 800 Forward compartment 27. A 900 Minimum bow 28. A 1000 Access to and within narrow ballast 29. A 1100 Steering gear compartment .. 29. A 1200 Navigation bridge design .. 29. A 1300 Oil fuel tank protection .. 29. B. Structural design Principles .. 29. B 100 design procedure .. 29. B 200 Loading conditions .. 30. B 300 hull girder strength .. 32. B 400 Local bending and shear strength .. 32. B 500 Buckling strength .. 33. B 600 Impact strength .. 33. DET NORSKE VERITAS AS. rules for Ships , January 2012. Contents Page 5. B 700 Fatigue .. 34. B 800 Local vibrations .. 34. B 900 Miscellaneous strength 34. B 1000 Reliability-based analysis of hull structures .. 34. C. Local 34. C 100 Definition of span for stiffeners and girders .. 34. C 200 End connections of 36. C 300 End connections of 38. C 400 Effective flange of girders.

7 39. C 500 Effective web of 41. C 600 Stiffening of girders.. 42. C 700 Reinforcement at 45. C 800 Continuity of local strength 46. C 900 Welding of outfitting details to 47. C 1000 Properties and selection of sections.. 47. C 1100 Cold formed plating .. 49. Sec. 4 design Loads .. 51. A. General .. 51. A 100 51. A 200 Definitions .. 51. B. ship Motions and Accelerations .. 51. B 100 51. B 200 Basic parameters .. 52. B 300 Surge, sway /yaw and heave accelerations .. 53. B 400 Roll motion and acceleration .. 54. B 500 Pitch motion and 54. B 600 Combined vertical 55. B 700 Combined transverse acceleration .. 56. B 800 Combined longitudinal 56. C. Pressures and Forces .. 56. C 100 56. C 200 Sea 56. C 300 Liquids in 57. C 400 Dry cargoes, stores, equipment and 63. C 500 Deck cargo units. Deck equipment .. 64. Sec. 5 Longitudinal 65. A. General .. 65. A 100 65.

8 A 200 Definitions .. 65. B. Still Water and Wave Induced hull Girder Bending Moments and Shear Forces .. 66. B 100 Stillwater conditions .. 66. B 200 Wave load 69. C. Bending Strength and 72. C 100 Midship section particulars .. 72. C 200 Extent of high strength steel (HS-steel) .. 72. C 300 Section modulus .. 73. C 400 Moment of inertia .. 76. D. Shear 76. D 100 76. D 200 Ships with single or double skin and without other effective longitudinal bulkheads .. 78. D 300 Ships with two effective longitudinal bulkheads .. 79. D 400 Ships with number of effective longitudinal bulkheads different from 81. D 500 Strengthening in way of transverse stringers .. 82. E. Openings in Longitudinal Strength 82. E 100 82. E 200 Deduction-free 83. E 300 83. E 400 Reinforcement and shape of smaller openings .. 84. E 500 Hatchway 84. E 600 Miscellaneous .. 85. F. Loading Guidance Information.

9 85. F 100 85. F 200 Conditions of approval of loading manuals .. 86. DET NORSKE VERITAS AS. rules for Ships , January 2012. Contents Page 6. F 300 Condition of approval of loading computer systems .. 86. Sec. 6 Bottom Structures .. 87. A. General .. 87. A 100 87. A 200 Definitions .. 87. A 300 88. A 400 Structural arrangement and 88. A 500 Bottom arrangement .. 88. B. design 89. B 100 Local loads on bottom structures .. 89. B 200 Total loads on double bottom .. 89. C. Plating and 90. C 100 90. C 200 Keel plate .. 90. C 300 Bottom and bilge 90. C 400 Inner bottom 91. C 500 Plating in double bottom floors and longitudinal girders .. 92. C 600 Transverse frames .. 92. C 700 Bottom 93. C 800 Inner bottom 94. C 900 Stiffening of double bottom floors and 94. D. Arrangement of Double Bottom .. 95. D 100 95. D 200 Double bottom with transverse framing .. 95. D 300 Double bottom with longitudinals.

10 96. E. Double Bottom Girder System below Cargo Holds and Tanks .. 96. E 100 Main scantlings .. 96. F. Single Bottom Girders .. 96. F 100 Main scantlings .. 96. F 200 Local scantlings .. 96. G. Girders in Peaks .. 97. G 100 Arrangement .. 97. G 200 97. G 300 Details .. 97. H. Special Requirements .. 98. H 100 Vertical struts .. 98. H 200 Strengthening against slamming .. 98. H 300 Strengthening for grab loading and discharging - Optional class - special features notation 100. H 400 100. Sec. 7 Side 101. A. General .. 101. A 100 101. A 200 Definitions .. 101. A 300 102. A 400 Structural arrangement and 102. B. design 103. B 100 Local loads on side structures .. 103. C. Plating and 104. C 100 Side plating, general .. 104. C 200 Sheer strake at strength 105. C 300 Longitudinals .. 105. C 400 Main frames .. 106. C 500 'Tween deck frames and vertical peak frames.