1、RULES FORCLASSIFICATION OFDET NORSKE VERITASVeritasveien 1,NO-1322 Hvik,Norway Tel.:+47 67 57 99 00 Fax:+47 67 57 99 11SHIPSIACS COMMON STRUCTURAL RULESPART 8 CHAPTER 2COMMON STRUCTURAL RULES FOR BULK CARRIERS WITH LENGTH 90 METRES AND ABOVEJANUARY 2006CONTENTSCh.1General principlesCh.2General arran
2、gement designCh.3Structural design principlesCh.4Design loadsCh.5Hull girder strengthCh.6Hull scantlingsCh.7Direct strength analysisCh.8Fatigue check of structural detailsCh.9Other structuresCh.10Hull outfittingCh.11Construction and testingCh.12Additional Class NotationsCh.13Ships in Operation,Renew
3、al CriteriaINTRODUCTION Comments to the rules may be sent by e-mail to For subscription orders or information about subscription terms,please use Comprehensive information about DNV and the Societys services is found at the Web site http:/Copyright in these Rules is owned by Det Norske Veritas.(Copy
4、right in these Rules is also owned by the other IACS members as at 15 January 2006.Copyright 2006.)Printed in Norway 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
5、personfor his proved direct loss or damage.However,the compensation shall not exceed an amount equal to ten times the fee charged for the service in question,provided that the maximum compen-sation shall never exceed USD 2 million.In this provision Det Norske Veritas shall mean the Foundation Det No
6、rske Veritas as well as all its subsidiaries,directors,officers,employees,agents and any other acting on behalf of DetNorske Veritas.GeneralThe Board approved this new chapter in December 2005.The rules come into force on 1 April 2006.This chapter is valid until superseded by a revised chapter.Suppl
7、e-ments will not be issued except for an updated list of corrections pre-sented in Pt.0 Ch.1 Sec.3.Pt.0 Ch.1 is normally revised in January andJuly each year.Revised chapters will be forwarded to all subscribers to the rules.Buyers of reprints are advised to check the updated list of rule chap-ters
8、printed in Pt.0 Ch.1 Sec.1 to ensure that the chapter is current.The Rules contain structural requirements for the Classification ofBulk Carriers of 90 m in length or greaterThe Rules contain thirteen chapters.Common Structural Rules for Bulk Carriers Table of Contents Chapter 1-General principles S
9、ection 1-Application Section 2-Verification of compliance Section 3-Functional requirements Section 4-Symbols and definitions Chapter 2-General arrangement design Section 1-Subdivision arrangement Section 2-Compartment arrangement Section 3-Access arrangement Chapter 3-Structural design principles S
10、ection 1-Material Section 2-Net scantling approach Section 3-Corrosion additions Section 4-Limit states Section 5-Corrosion protection Section 6-Structural arrangement principles Chapter 4-Design loads Section 1-General Section 2-Ship motions and accelerations Section 3-Hull girder loads Section 4-L
11、oad cases Section 5-External pressures Section 6-Internal pressures and forces Section 7-Loading conditions Section 8-Loading manual&Loading instrument Appendix 1-Hold mass curves Appendix 2-Standard loading conditions for direct strength analysis Appendix 3-Standard loading conditions for fatigue s
12、trength assessment Chapter 5-Hull girder strength Section 1-Yielding check Section 2-Ultimate strength check Appendix 1-Hull girder ultimate strength January 2006 Common Structural Rules for Bulk Carriers Chapter 6-Hull scantlings Section 1-Plating Section 2-Ordinary stiffeners Section 3-Buckling&ul
13、timate strength of ordinary stiffeners and stiffened panels Section 4-Primary supporting members Appendix 1 Buckling&ultimate strength Chapter 7-Direct strength analysis Section 1-Direct strength assessment of the primary supporting members Section 2-Global strength FE analysis of cargo hold structu
14、re Section 3-Detailed stress assessment Section 4-Hot spot stress analysis for fatigue strength assessment Appendix 1-Longitudinal extent of the finite element models Appendix 2 Displacement based buckling assessment in finite element analysis Chapter 8-Fatigue check of structural details Section 1-
15、General consideration Section 2-Fatigue strength assessment Section 3-Stress assessment of primary members Section 4-Stress assessment of stiffeners Section 5-Stress assessment of hatch corners Appendix 1 Cross sectional properties for torsion Chapter 9-Other structures Section 1-Fore part Section 2
16、-Aft part Section 3-Machinery spaces Section 4-Superstructures and deckhouses Section 5-Hatch covers Section 6-Arrangement of hull and superstructure openings Chapter 10-Hull outfitting Section 1-Rudder and manoeuvring arrangements Section 2-Bulwarks and guard rails Section 3-Equipment Chapter 11-Co
17、nstruction and testing Section 1-Construction Section 2-Welding Section 3-Testing of compartments Chapter 12-Additional Class Notations Section 1-GRAB additional Class notation January 2006 Common Structural Rules for Bulk Carriers Chapter 13 Ships in Operation,Renewal Criteria Section 1-Maintenance
18、 of Class Section 2-Thickness measurements and acceptance criteria January 2006 Common Structural Rules for Bulk Carriers Chapter 1 January 2006 Chapter 1 General Principles Section 1 Application Section 2 Verification of Compliance Section 3 Functional Requirements Section 4 Symbols and Definitions
19、 Common Structural Rules for Bulk Carriers Chapter 1,Section 1 January 2006 Page 3 Section 1-APPLICATION 1.General 1.1 Structural requirements 1.1.1 These Rules apply to ships classed with the Society and contracted for construction on or after 1 April 2006.Note:The contracted for construction means
20、 the date on which the contract to build the ship is signed between the prospective owner and the shipbuilder.For further details regarding the date of contracted for construction,refer to IACS Procedural Requirement(PR)No.29.1.1.2 These Rules apply to the hull structures of single side skin and dou
21、ble side skin bulk carriers with unrestricted worldwide navigation,having length L of 90 m or above.With bulk carrier is intended sea going self-propelled ships which are constructed generally with single deck,double bottom,hopper side tanks and topside tanks and with single or double side skin cons
22、truction in cargo length area and intended primarily to carry dry cargoes in bulk,excluding ore and combination carriers.Hybrid bulk carriers,where at least one cargo hold is constructed with hopper tank and topside tank,are covered by the present Rules.The structural strength of members in holds co
23、nstructed without hopper tank and/or topside tank is to comply with the strength criteria defined in the Rules.1.1.3 The present Rules contain the IACS requirements for hull scantlings,arrangements,welding,structural details,materials and equipment applicable to all types of bulk carriers having the
24、 following characteristics:L 5 B/D 2.5 CB 0.6 1.1.4 The Rule requirements apply to welded hull structures made of steel having characteristics complying with requirements in Ch 3,Sec 1.The requirements apply also to welded steel ships in which parts of the hull,such as superstructures or small hatch
25、 covers,are built in material other than steel,complying with requirements in Ch 3,Sec 1.1.1.5 Ships whose hull materials are different than those given in 1.1.4 and ships with novel features or unusual hull design are to be individually considered by the Society,on the basis of the principles and c
26、riteria adopted in the present Rules.1.1.6 The scantling draught considered when applying the present Rules is to be not less than that corresponding to the assigned freeboard.Chapter 1,Section 1 Common Structural Rules for Bulk Carriers Page 4 January 2006 1.1.7 Where scantlings are obtained from d
27、irect calculation procedures which are different from those specified in Ch 7,adequate supporting documentation is to be submitted to the Society,as detailed in Sec 2.1.2 Limits of application to lifting appliances 1.2.1 The fixed parts of lifting appliances,considered as an integral part of the hul
28、l,are the structures permanently connected by welding to the ships hull(for instance crane pedestals,masts,king posts,derrick heel seatings,etc.,excluding cranes,derrick booms,ropes,rigging accessories,and,generally,any dismountable parts),only for that part directly interacting with the hull struct
29、ure.The shrouds of masts embedded in the ships structure are considered as fixed parts.1.2.2 The fixed parts of lifting appliances and their connections to the ships structure may be covered by the Societys Rules for lifting appliances,and/or by the certification(especially the issuance of the Cargo
30、 Gear Register)of lifting appliances when required.1.2.3 The design of the structure supporting fixed lifting appliances and the structure that might be called to support a mobile appliance should be designed taking into account the additional loads that will be imposed on them by the operation of t
31、he appliance as declared by the shipbuilder or its sub-contractors.1.3 Limits of application to welding procedures 1.3.1 The requirements of the present Rules apply also for the preparation,execution and inspection of welded connections in hull structures.They are to be complemented by the general r
32、equirements relevant to fabrication by welding and qualification of welding procedures given by the Society when deemed appropriate by the Society.2.Rule application 2.1 Ship parts 2.1.1 General For the purpose of application of the present Rules,the ship is considered as divided into the following
33、three parts:fore part central part aft part.2.1.2 Fore part The fore part includes the structures located forward of the collision bulkhead,i.e.:Common Structural Rules for Bulk Carriers Chapter 1,Section 1 January 2006 Page 5 the fore peak structures the stem.In addition,it includes:the reinforceme
34、nts of the flat bottom forward area the reinforcements of the bow flare area.2.1.3 Central part The central part includes the structures located between the collision bulkhead and the after peak bulkhead.Where the flat bottom forward area or the bow flare area extend aft of the collision bulkhead,th
35、ey are considered as belonging to the fore part.2.1.4 Aft part The aft part includes the structures located aft of the after peak bulkhead.2.2 Rules applicable to various ship parts 2.2.1 The various chapters and sections are to be applied for the scantling of ship parts according to Tab 1.Table 1:C
36、hapters and sections applicable for the scantling of ship parts Applicable Chapters and Sections Part General Specific Fore part Ch 9,Sec 1 Central part Ch 6 Ch 7 Ch 8 Aft part Ch 1 Ch 2 Ch 3 Ch 4 Ch 5 Ch 9(1),excluding:Ch 9,Sec 1 Ch 9,Sec 2 Ch 11 Ch 9,Sec 2(1)See also 2.3.2.3 Rules applicable to ot
37、her ship items 2.3.1 The various Chapters and Sections are to be applied for the scantling of other ship items according to Tab 2.Table 2:Chapters and sections applicable for the scantling of other items Item Applicable Chapters and Sections Machinery spaces Ch 9,Sec 3 Superstructures and deckhouses
38、 Ch 9,Sec 4 Hatch covers Ch 9,Sec 5 Hull and superstructure openings Ch 9,Sec 6 Rudders Ch 10,Sec 1 Bulwarks and guard rails Ch 10,Sec 2 Equipment Ch 10,Sec 3 Chapter 1,Section 1 Common Structural Rules for Bulk Carriers Page 6 January 2006 3.Class Notations 3.1 Additional service features BC-A,BC-B
39、 and BC-C 3.1.1 The following requirements apply to ships,as defined in 1.1.2,having length L of 150 m or above.3.1.2 Bulk carriers are to be assigned one of the following additional service features:a)BC-A:for bulk carriers designed to carry dry bulk cargoes of cargo density 1.0 t/m3 and above with
40、 specified holds empty at maximum draught in addition to BC-B conditions.b)BC-B:for bulk carriers designed to carry dry bulk cargoes of cargo density of 1.0 t/m3 and above with all cargo holds loaded in addition to BC-C conditions.c)BC-C:for bulk carriers designed to carry dry bulk cargoes of cargo
41、density less than 1.0 t/m3.3.1.3 The following additional service features are to be provided giving further detailed description of limitations to be observed during operation as a consequence of the design loading condition applied during the design in the following cases:maximum cargo density(in
42、t/m3)for additional service features BC-A and BC-B if the maximum cargo density is less than 3.0 t/m3(see also Ch 4,Sec 7,2.1).no MP for all additional service features when the ship has not been designed for loading and unloading in multiple ports in accordance with the conditions specified in Ch 4
43、,Sec 7,3.3.allowed combination of specified empty holds for additional service feature BC-A(see also Ch 4,Sec 7,2.1).3.2 Additional class notation GRAB X 3.2.1 Application The additional class notation GRAB X is mandatory for ships having one of the additional service features BC-A or BC-B,according
44、 to 3.1.2.For these ships the requirements for the GRAB X notation given in Ch 12,Sec 1 are to be complied with for an unladen grab weight X equal to or greater than 20 tons.For all other ships the additional class notation GRAB X is voluntary.3.3 Class notation CSR 3.3.1 Application In addition to
45、the class notations granted by the assigning Society and to the service features and additional class notations defined hereabove,ships fully complying with the present Rules will be assigned the notation CSR.Common Structural Rules for Bulk Carriers Chapter 1,Section 2 January 2006 Page 7 Section 2
46、-VERIFICATION OF COMPLIANCE 1.General 1.1 New buildings 1.1.1 For new buildings,the plans and documents submitted for approval,as indicated in 2,are to comply with the applicable requirements in Ch 1 to Ch 12 of the present Rules,taking account of the relevant criteria,as the additional service feat
47、ures and classification notation assigned to the ship or the ship length.1.1.2 When a ship is surveyed by the Society during construction,the Society:approves the plans and documentation submitted as required by the Rules proceeds with the appraisal of the design of materials and equipment used in t
48、he construction of the ship and their inspection at works carries out surveys or obtains appropriate evidence to satisfy itself that the scantlings and construction meet the rule requirements in relation to the approved drawings attends tests and trials provided for in the Rules assigns the construc
49、tion mark.1.1.3 The Society defines in specific Rules which materials and equipment used for the construction of ships built under survey are,as a rule,subject to appraisal of their design and to inspection at works,and according to which particulars.1.1.4 As part of his interventions during the shi
50、ps construction,the Surveyor will:conduct an overall examination of the parts of the ship covered by the Rules examine the construction methods and procedures when required by the Rules check selected items covered by the rule requirements attend tests and trials where applicable and deemed necessar
