Rules for the Certification

7/27/2019 Rules for the Certification

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Rules for the Certificationof Lifting Appliances onboard

Ships and Offshore Units

October 2011

Rule NoteNR 526 DT R01 E

Marine Division

92571 Neuilly sur Seine Cedex FranceTel: + 33 (0)1 55 24 70 00 Fax: + 33 (0)1 55 24 70 25

Marine website: http://www.veristar.comEmail: [email protected]

2011 Bureau Veritas - All rights reserved


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ARTICLE 1

1.1. - BUREAU VERITAS is a Society the purpose of whose Marine Division (the "Society") is the classi-fication (" Classification ") of any ship or vessel or structure of any type or part of it or system therein col-lectively hereinafter referred to as a "Unit" whether linked to shore, river bed or sea bed or not, whetheroperated or located at sea or in inland waters or partly on land, including submarines, hovercrafts, drillingrigs, offshore installations of any type and of any purpose, their related and ancillary equipment, subseaor not, such as well head and pipelines, mooring legs and mooring points or otherwise as decided by theSociety.

The Society:

prepares and publishes Rules for classification, Guidance Notes and other documents (Rules);

issues Certificates, Attestations and Reports following its interventions (Certificates);

publishes Registers.

1.2. - The Society also participates in the application of National and International Regulations or Stand-ards, in particular by delegation from d ifferent Governments. Those activities are hereafter collectively re-ferred to as " Certification ".

1.3. - The Society can also provide services related to Classification and Certification such as ship andcompany safety management certification; ship and port security certification, training activities; all activi-ties and duties incidental thereto such as documentation on any supporting means, software, instrumen-tation, measurements, tests and trials on board.

1.4. - The interventions mentioned in 1.1., 1.2. and 1.3. are referred to as " Services ". The party and/or itsrepresentative requesting the services is hereinafter referred to as the " Client ". The Services are pre-pared and carried out on the assumption that the Clients are aware of the International Maritime

and/or Offshore Industry (the "Industry") practices.

1.5. - The Society is neither and may not be considered as an Underwriter, Broker in ship's sale or char-tering, Expert in Unit's valuation, Consulting Engineer, Controller, Naval Architect, Manufacturer, Ship-builder, Repair yard, Charterer or Shipowner who are not relieved of any of their expressed or impliedobligations by the interventions of the Society.

ARTICLE 2

2.1. - Classification is the appraisement given by the Societ y for its Client, at a certain date, f ollowing sur-veys by its Surveyors along the lines specified in Articles 3 and 4 hereafter on the level of compliance ofa Unit to its Rules or part of them. This appraisement is represented by a class entered on the Certificatesand periodically transcribed in the Society's Register.

2.2. - Certification is carried out by the Society along the same lines as set out in Art icles 3 and 4 hereafterand with reference to the applicable National and International Regulations or Standards.

2.3. - It is incumbent upon the Client to maintain the condition of the Unit after surveys, to presentthe Unit for surveys and to inform the Society without delay of circumstances which may affect thegiven appraisement or cause to modify its scope.

2.4. - The Client is to give to the Society all access and information necessary for the safe and efficientperformance of the requested Services. The Client is the sole responsible for the conditions of presenta-

tion of the Unit for tests, trials and surveys and the conditions under which tests and trials are carr ied out.

ARTICLE 3

3.1. - The Rules, procedures and instructions of the Society take into account at the date of theirpreparation the state of currently available and proven technical knowledge of the Industry. Theyare not a standard or a code of construction neither a guide for maintenance, a safety handbookor a guide of professional practices, all of which are assumed to be known in detail and carefullyfollowed at all times by the Client.

Committees consisting of personalities from the Industry contribute to the development of those docu-ments.

3.2. - The Society only is qualified to apply its Rules and to interpret them. Any reference to themhas no effect unless it involves the Society's intervention.

3.3. - The Services of the Society are carried out by professional Surveyors according to the applicableRules and to the Code of Ethics of the Society. Surveyors have authority to decide locally on matters re-lated to classification and certification of the Units, unless the Rules provide otherwise.

3.4. - The operations of the Society in providing its Services are exclusively conducted by way ofrandom inspections and do not in any circumstances involve monitoring or exhaustive verifica-tion.

ARTICLE 4

4.1. - The Society, acting by reference to its Rules:

reviews the construction arrangements of the Units as shown on the documents presented by the Cli-ent;

conducts surveys at the place of their construction;

classes Units and enters their class in its Register;

surveys periodically the Units in service to note that the requirements for the maintenance of class aremet.

The Client is to inform the Society without delay of circumstances which may cause the date or theextent of the surveys to be changed.

ARTICLE 5

5.1. - The Society acts as a provider of services. This cannot be construed as an obligation bearingon the Society to obtain a result or as a warranty.

5.2. - The certificates issued by the Society pursuant to 5.1. here above are a statement on the levelof compliance of the Unit to its Rules or to the documents of reference for the Services providedfor.

In particular, the Society does not engage in any work relating to the design, building, productionor repair checks, neither in the operation of the Units or in their trade, neither in any advisory serv-ices, and cannot be held liable on those accounts. Its certificates cannot be construed as an im-plied or express warranty of safety, fitness for the purpose, seaworthiness of the Unit or of its valuefor sale, insurance or chartering.

5.3. - The Society does not declare the acceptance or commissioning of a Unit, nor of its construc-tion in conformity with its design, that being the exclusive responsibility of its owner or builder,respectively.

5.4. - The Services of the Society cannot create any obligation bearing on the Society or constitute anywarranty of proper operation, beyond any representation set forth in the Rules, of any Unit, equipment ormachinery, computer software of any sort or other comparable concepts that has been subject to any sur-vey by the Society.

ARTICLE 6

6.1. - The Society accepts no responsibility for the use of information related to its Services which was notprovided for the purpose by the Society or with its assistance.

6.2.- If the Services of the Society cause to the Client a damage which is proved to be the directand reasonably foreseeable consequence of an error or omission of the Society, its liability to-wards the Client is limited to ten times the amount of fee paid for the Service having caused thedamage, provided however that this limit shall be subject to a minimum of eight thousand (8,000)Euro, and to a maximum which is the greater of eight hundred thousand (800,000) Euro and oneand a half times the above mentioned fee.

The Society bears no liability for indirect or consequential loss such as e.g. loss of revenue, lossof profit, loss of production, loss relative to other contracts and indemnities for termination of oth-er agreements.

6.3. - All claims are to be presented to the Society in writing within three months of the date when the Serv-ices were supplied or (if later) the date when the events which are relied on of were first known to the Client,and any claim which is not so presented shall be deemed waived and absolutely barred. Time is to be in-terrupted thereafter with the same periodicity.

ARTICLE 7

7.1. - Requests for Services are to be in writing.7.2. - Either the Client or the Society can terminate as of right the requested Services after givingthe other party thirty days' written notice, for convenience, and without prejudice to the provisionsin Article 8 hereunder.

7.3. - The class granted to the concerned U nits and the previously issued certificates remain valid until thedate of effect of the notice issued according to 7.2. here above subject to compliance with 2.3. here aboveand Article 8 hereunder.

7.4. - The contract for classification and/or certification of a Unit cannot be transferred neither assigned.

ARTICLE 8

8.1. - The Services of the Society, whether completed or not, involve, for the part carried out, the paymentof fee upon receipt of the invoice and the reimbursement of the expenses incurred.

8.2. Overdue amounts are increased as of right by interest in accordance with the applicable leg-islation.

8.3. - The class of a Unit may be suspen ded in the event of non -payment of fee after a first unfru itfulnotification to pay.

ARTICLE 9

9.1. - The documents and data provided to or prepared by the Society for its Services, and the informationavailable to the Society, are treated as confidential. However:

clients have access to the data they have provided to the Society and, during the period of classifica-tion of the Unit for them, to the classification file consisting of survey reports and certificates whichhave been prepared at any time by the Society for the classification of the Unit;

copy of the documents made available for the classification of the Unit and of available survey reportscan be handed over to another Classification Society, where appropriate, in case of the Unit's transferof class;

the data relative to the evolution of the Register, to the class suspension and to the survey status of theUnits, as well as general technical information related to hull and equipment damages, are passed onto IACS (International Association of Classification Societies) according to the association workingrules;

the certificates, documents and information relative to the Units classed with the Society may bereviewed during certificating bodies audits and are disclosed upon order of the concerned governmen-tal or inter-governmental authorities or of a Court having jurisdiction.

The documents and data are subject to a file management plan.

ARTICLE 10

10.1. - Any delay or shortcoming in the performance of its Services by the Society arising from an eventnot reasonably foreseeable by or beyond the control of the Society shall be deemed not to be a breach ofcontract.

ARTICLE 11

11.1. - In case of diverging opinions during surveys between the Client and the Society's surveyor, the So -ciety may designate another of its surveyors at the request of the Client.

11.2. - Disagreements of a technical nature between the Client and the Society can be submitted by theSociety to the advice of its Marine Advisory Committee.

ARTICLE 12

12.1. - Disputes over the Services carried out by delegation of Governments are assessed within theframework of the applicable agreements with the States, international Conventions and national rules.

12.2. - Disputes arising out of the payment of t he Society's invoices by the Client are submitted to the Courtof Nanterre, France.

12.3. - Other disputes over the present General Conditions or over the Services of the Society areexclusively submitted to arbitration, by three arbitrators, in London according to the ArbitrationAct 1996 or any statutory modification or re-enactment thereof. The contract between the Societyand the Client shall be governed by English law.

ARTICLE 13

13.1. - These General Conditions constitute the sole contractual obligations binding together theSociety and the Client, to the exclusion of all other representation, statements, terms, conditionswhether express or implied. They may be varied in writing by mutual agreement.

13.2. - The invalidity of one or more stipulations of the present General Conditions does not affect the va-lidity of the remaining provisions.

13.3. - The definitions herein take precedence over any definitions serving the same purpose which mayappear in other documents issued by the Society.

BV Mod. Ad. ME 545 k - 17 December 2008

M A R I N E D I V I S I O N

G E N E R A L C O N D I T I O N S


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October 2011

RULE NOTE NR 526

Rules for the Certification of Lifting Appliances

onboard Ships and Offshore Units

SECTION 1 GENERAL PROVISIONS

SECTION 2 CONSTRUCTIONAL ARRANGEMENTS

SECTION 3 DATA FOR CALCULATION

SECTION 4 DESIGN ACCEPTANCE CRITERIA

SECTION 5 LOOSE GEAR AND REMOVABLE ACCESSORIES

SECTION 6 ROPES

SECTION 7 WINCHES

SECTION 8 ELECTRICAL INSTALLATIONS AND HYDRAULIC SYSTEMS

SECTION 9 CONTROL AND SAFETY OF LIFTING APPLIANCES

SECTION 10 CONSTRUCTION, SURVEY, TESTING AND MARKING

SECTION 11 MAINTENANCE

APPENDIX 1 CALCULATION OF FORCES DUE TO WIND ON STRUCTURES

APPENDIX 2 EFFICIENCIES OF SHEAVES AND TACKLES
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2 Bureau Veritas October 2011

Unless otherwise specified, these rules apply to ships and lifting appliances forwhich contracts are signed after October 1st, 2011. The Society may refer tothe contents hereof before October 1st, 2011, as and when deemed necessaryor appropriate.
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October 2011 Bureau Veritas 3

NR 526 Rules for the Certification of Lifting Appliances

onboard Ships and Offshore Units

Section 1 General Provisions

1 General 9

1.1 Application1.2 Scope of Bureau Veritas intervention1.3 Rules to be applied1.4 Definitions1.5 Measuring units

2 Certification 11

2.1 Scope

2.2 Bureau Veritas certification2.3 Certification in compliance with special national rules

3 Classification 11

3.1 General3.2 Class notations3.3 Construction marks3.4 Criteria for granting ALP, ALM or ALS class notations3.5 Criteria for granting (ALP), (ALM) or (ALS) class notations

4 Cargo Gear Register 13

4.1 General4.2 Criteria for issuance of Bureau Veritas Cargo Gear Register

5 Various interventions 14

5.1 General

6 Documents to be submitted 15

6.1 General6.2 Lifting appliances6.3 Supporting structure of the lifting appliance

Section 2 Constructional Arrangements

1 Materials 16

1.1 General1.2 Steel plates and sections1.3 Weldings1.4 Steel forgings1.5 Steel castings1.6 Iron castings1.7 Bolting

2 Constructional arrangements 18

2.1 Minimum thickness2.2 Diameter/thickness ratio for crane pedestals of circular cross-section2.3 Width/thickness ratio of plane walls2.4 Means of access2.5 Constructional arrangements2.6 Local scantlings of attachment decks


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Section 3 Data for Calculation

1 Data 20

1.1 General

1.2 Duty categories1.3 Dead weights

2 Influence of self motions 21

2.1 General2.2 Influence of slewing motion of cranes

3 Influence of external conditions 21

3.1 General3.2 List and trim3.3 Environmental conditions3.4 Coefficients determination

4 Standard calculation load cases 23

4.1 Design loading4.2 Loading cases to be considered4.3 Particular case: lifting of submarine craft

Section 4 Design Acceptance Criteria

1 Stability and strength criteria 25

1.1 General1.2 Check of functional stability of crane jib1.3 Strength criteria1.4 Calculation of buckling coefficient for beams1.5 Verification of plate panels against buckling

2 Calculations for special components 27

2.1 Crane pedestals2.2 Slewing rings2.3 Bolting of cranes2.4 Structural axles and hinges2.5 Crane jibs

3 Hull connections 33

3.1 General3.2 Direct calculations

4 Equipment and machinery 34

4.1 Ropes and steel wire ropes4.2 Diameter of block sheaves4.3 Accessories4.4 Winches4.5 Electrical installations and hydraulic systems4.6 Safety devices


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Section 5 Loose Gear and Removable Accessories

1 General 36

1.1 Definition of loose gear and other removable accessories

1.2 Materials1.3 Constructional arrangements

2 Definition of the individual SWL of items of loose gear 37

2.1 General2.2 Definition of the individual SWL

3 Particular items of loose gear 38

3.1 Blocks and head fittings3.2 Shackles3.3 Triangle plates3.4 Other removable accessories (not submitted to individual tests)

4 Lifting beams 42

4.1 General4.2 Determination of scantlings

Section 6 Ropes

1 General 44

1.1 Application

1.2 General2 Materials and manufacture of steel wire ropes and fibre ropes 44

2.1 Steel wire ropes2.2 Fibre ropes

3 Running rigging 44

3.1 General3.2 Safety coefficients3.3 Cargo runners3.4 Span ropes3.5 Slewing guy ropes

4 Wire and fibre rope terminals accessories 454.1 General4.2 Spliced terminal loops4.3 Thimbles4.4 Rope terminations with sockets4.5 Clamps4.6 Accessories

5 Slings and grommets 45

5.1 General5.2 Materials and construction5.3 SWL and utilization coefficients


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Section 7 Winches

1 General 48

1.1 Application1.2 Drums

1.3 Seatings

2 Winches 50

2.1 Hand winches and winches not to be operated under load2.2 Powered winches and winches operated under load

3 Tests 51

3.1 General provisions3.2 Prototype tests3.3 Tests of standardized winches

Section 8 Electrical Installations and Hydraulic Systems

1 General 53

1.1 Application1.2 General1.3 Documentation to be submitted

2 Electrical installations, hydraulic and pneumatic systems 53

2.1 Electrical installations2.2 Hydraulic systems2.3 Hydraulic cylinders2.4 Pneumatic equipment

Section 9 Control and Safety of Lifting Appliances

1 General 56

1.1 Application

2 Control and safety devices 56

2.1 Control devices2.2 Safety equipment

3 Additional requirements 57

3.1 Additional requirements applicable to offshore operations3.2 Additional requirements applicable to personnel hoisting3.3 Additional requirements applicable to lifting of submarine crafts

4 Secondary structure and means of access 58

4.1 General4.2 Structural calculation4.3 Means of access

Section 10 Construction, Survey, Testing and Marking

1 General provisions 591.1 Application


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2 Welding 59

2.1 General2.2 Butt welds2.3 Fillet welds and angle welds2.4 Heat-treatment

3 Inspection at work 61

3.1 Inspection of materials and welding at works3.2 Inspection of welds3.3 Dimensional checking and visual inspection3.4 Non-destructive examinations3.5 Repair of defects and final decision

4 Construction survey of the lifting appliances and of their accessories 62

4.1 Survey of the elements within the scope of ship classification4.2 Survey of the components outside ship classification

5 Inspection and testing at works of ropes 635.1 Steel wire ropes5.2 Fibre ropes

6 Final inspection and testing at works prior to fitting onboard 63

6.1 Final inspection prior to fitting onboard6.2 Tests prior to fitting onboard6.3 Loose gear6.4 Locking devices6.5 Cylinders and hydraulic equipment6.6 Other equipments

7 Testing and inspection of loose gear prior to fitting onboard 64

7.1 General7.2 Proof loads7.3 Blocks7.4 Chains7.5 Ramshorn hooks7.6 Lifting beams, lifting frames and similar lifting aids (spreaders)7.7 Thorough examination after testing

8 Survey of fitting onboard 66

8.1 General

9 Overall testing prior to putting into service 67

9.1 General9.2 No-load testing and preliminary checking9.3 Overload testing9.4 Operational testing9.5 Inspections after testing

10 Marking 68

10.1 General10.2 Recommendations of marking equipments or accessories10.3 Marking of equipments after construction survey or final inspection10.4 Marking of loose gear10.5 Marking of the lifting appliance prior to putting into service


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Section 11 Maintenance

1 General provisions 71

1.1 Application1.2 Survey requirements for the fixed part of the lifting appliances in scope of ship

classification1.3 Validity of Bureau Veritas Cargo Gear Register and Maintenance of additional

class notations for lifting appliances1.4 Postponements of surveys or examinations1.5 National regulations

2 Six-monthly or annual thorough examinations 72

2.1 General2.2 Fixed parts and connections with hull2.3 Removable structures and fittings2.4 Loose gear2.5 Wire and fibre ropes

2.6 Winches2.7 Operation and safety devices

3 Quinquennial thorough examinations 74

3.1 General3.2 Systematic checking of the location and marking of loose gear3.3 Thickness measurements3.4 Systematic dismantling3.5 Re-testing

4 Repairs and criteria to replace equipment or accessories 75

4.1 General

4.2 Wear limits and criteria for replacement4.3 Rope discard criteria4.4 Repairs4.5 Tests after repairs or replacements

5 Occasional interventions after damage or conversion 77

5.1 Survey after damage5.2 Conversion

Appendix 1 Calculation of Forces due to Wind on Structures

1 General 79

1.1 Application1.2 Wind pressure

Appendix 2 Efficiencies of Sheaves and Tackles

1 General 80

1.1 Application1.2 Efficiency of sheaves1.3 Efficiency of the tackles


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NR 526, Sec 1


SECTION 1 GENERAL PROVISIONS

1 General

1.1 Application

1.1.1 This Rule Note is applicable to lifting appliances fit-

ted on ships, floating supports, fixed or mobile offshore

platforms, and used:

a) at harbour for loading or unloading cargoes, equip-

ments, spare parts or consumables

b) in offshore conditions for various lifting operations

exclusive of the appliances mentioned in item a)

c) at sea for launching and recovering diving devices.

Note 1: Lifting appliances used in harbour or in similar conditions

for lifting operations other than ships loading or unloading are con-

sidered as of type a).

1.1.2 This Rule Note does not deal with handling apparatus

such as derricks, movable or lifting platform, cargo ramps,

passenger and cargo lifts, lift trucks and lifeboat davits.

However when application is requested, considered as pos-sible and reasonable, this Rule Note may be used wholly or

partly by the Society upon special request of the Owner or

Builder for appliances not listed in [1.1.1].

1.1.3 The scantlings of constituent parts of cargo gear, spe-

cially those of loose gear, are given either in tables or by for-

mulae. However, the components which comply with

national or international standards or with specifications

considered as equivalent may be accepted.

1.1.4 Bureau Veritas may modify this Rule Note, add new

ones or accept others considered as equivalent, if deemednecessary or advisable. In particular, Rule requirements of

NR184 Lifting Appliances, applicable to derricks and union

purchase, are still valid and applicable.

1.2 Scope of Bureau Veritas intervention

1.2.1 This Rule Note covers the following services relating

to the appliances as per [1.1.1]:

a) Issuance of Class Notations (see [3]):

granting a ship or offshore unit, classed to the Society,one or several class notations and mark notations as per

[3], stating that the lifting appliances are under full sur-

vey and comply with the requirements of [2.4] or [2.5].

b) Issuance of certification (see [2]):

Bureau Veritas certification of lifting appliances onthe basis of the international regulations mentionedin [1.2.3] and [1.2.4] (see [2.2])

certification of lifting appliances in accordance withspecial national regulations on behalf of NationalAuthorities (see [2.9])

c) Isssuance of Cargo Gear Register (see [4])

d) various interventions at the Owners or Builders request(see [2.10]).

1.3 Rules to be applied

1.3.1 Some requirements of this Rule Note are extractedfrom NR467 Rules for Steel Ships and NR445 Rules for Off-shore Units.

As the rules may be revised, the attention is drawn to thefact that, in case of discrepancy, the text to be applied is theone of the edition in force of the relevant rules and regula-tions, taking into account updated amendments, if any.

1.3.2 The Rules for Steel Ships and the Rules for OffshoreUnits deal with the scantlings of the fixed parts of the liftingappliances (see [1.2.2], Note 1) and their connections withthe ship or offshore unit structure. But they do not deal withthe scantlings of movable parts of these appliances, thechecking of which is outside the normal scope of classifica-tion.

Note 1: The fixed parts of lifting appliances, considered as integralpart of hull, are the structures definitively connected by welding toship hull or offshore unit structure (for instance crane pedestals,masts, derrick heel seating, etc...to the exclusion of the cranesthemselves, derrick booms, ropes, rigging accessories, and, gener-

ally, any dismountable parts).However, the shrouds of the mastsfixed in the ship structure are considered as fixed parts.

1.3.3 Provisions of this Rule Note are generally in accor-dance with those of:

Convention n 32: Protection against Accidents (dock-ers) Convention (revised), 1932

Convention n 152: Occupational Safety and Health(Dock Work) Convention, 1979, and

the relevant Recommendation n 160 adopted by theInternational Labour Organization (l.L.O.)

regarding the protection of workers employed in loadingand unloading ships when applied to appliances used forloading/unloading ships at harbour.


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NR 526, Sec 1


1.3.4 Provisions of this Rule Note are generally in accor-dance with Resolution A-414 (Xl) of the International Mari-time Organization (l.M.O.) as amended: Code for theConstruction and Equipment of Mobile Offshore DrillingUnits, 1979 (MODU code). They also take into account thecode of practice of the International Labour Office (I.L.O.):Safety and Health in the Construction of fixed OffshoreInstallations in the Petroleum Industry (edition 1981) whenapplied to apparatus used in offshore conditions.

1.3.5 The provisions of this Rule Note consist in ruleswhich reflect either from the application of the internationalregulations mentioned in [1.3.3] and [1.3.4], from theiraccepted interpretation or from special requirements of theSociety.

1.3.6 The Owners and Builders attention is drawn to thefact that it is their responsibility to check that the legal pro-visions and the national rules of the flag country of the ship

or the working unit and those of the competent authoritieson operational site are complied with.

1.4 Definitions

1.4.1 The term lifting appliance is used herein to designatethe whole of the elements used for suspending, raising orlowering loads or moving them from one position toanother while suspended or supported, for instance a craneand the whole of its mechanisms, etc.

1.4.2 The safe working load (SWL) of a lifting appliance isthe maximum mass which may be lifted vertically by thisappliance at the hanging point of the load (hook or liftingring) and which may be moved in operation.

So, when a special lifting aid, not permanently attached tothe apparatus, is used (lifting beam, for instance) the maxi-mum mass which may be hung to this device is equal to theSWL of the appliance less the own mass of this device andof the slings used.

A lifting appliance may have several values of SWL depend-ing on its use.

The safe working force (SWF) of a lifting appliance is thestatic force corresponding to its SWL.

A lifting appliance is not to be used to pull obliquely any

object whatever it may be (for example to shift a cargo) ifthis appliance has not been specially designed to do so.

1.4.3 Loose gear includes all items not permanentlyattached to the structure of the lifting appliances and whichare to be tested separately in compliance with the provi-sions of Sec 10, [7].

So these items may be interchanged between various liftingappliance. Items of loose gear are the following:

blocks

hooks

shackles

swivels

chains

rings

rigging screws

slings

lifting beams

hand operated tackles with pitched chains, rings, hooks,shackles and swivels permanently attached to

other movable items having similar use that items listed

hereabove.

1.4.4 The safe working load (SWL) of an item of loose gearis the maximum mass which may be borne vertically to it(see Sec 5 for the single sheave blocks).

The safe working force of an item of loose gear (SWF) is thestatic force corresponding to its SWL.

1.4.5 The test load of a lifting appliance is the mass to beapplied vertically upon testing onboard the ship or offshoreunit.

The test force of a lifting appliance is the static force corre-sponding to its test load.

1.4.6 The test load of an item of loose gear is the mass to beapplied upon its separate testing when test consists in verti-cal applying of a mass.

The test force of an item of loose gear is either the staticforce corresponding to its test load or the force to beapplied when test consists in application of a force.

1.4.7 The breaking load of an element is the minimummass which causes its breaking when applied vertically.

The breaking force of an element is either the static forcecorresponding to its breaking load or the minimum forcewhich causes its breaking.

1.4.8 The terms normal slewing system mean conventionalhandling process of a load by means of a single crane.According to this process, the horizontal handling phase isperformed by the slewing device of the crane.

1.5 Measuring units

1.5.1 The units used in this Rule Note are those of the Inter-national System SI.

1.5.2 SWL and test loads of lifting appliances and loosegear are expressed in tones (t). Breaking loads are alsoexpressed in t (1 t = 1 000 kg).

1.5.3 SWF and test forces of lifting appliances and loosegear are expressed in kilo newtons (kN). Breaking forces arealso expressed in kN.

1.5.4 The value of the gravity acceleration g is equal to9,807 m/s2

However, in order to simplify, the following value may beconsidered:

g = 10 m/s2

Taking into account the latter value of g, the relationbetween the loads (mass) P, in t, and the correspondingstatic forces F, in kN, is as follows:

F = 10 P

1.5.5 Tensile strengths and yield stresses as well as thestresses are in N/mm2.


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NR 526, Sec 1


1.5.6 Lengths and dimensions are expressed either inmetres (m) or in millimeters (mm).

1.5.7 Angles are expressed in degrees (), 1 = /180 radians.

2 Certification

2.1 Scope

2.1.1 The certification procedures of the lifting appliancesare defined in [2.2] or [2.9], as the case may be.

Certification results in issuance of the Cargo Gear Registerand of test certificates mentioned in [2.6.2] or [2.9.2], as thecase may be.

Certification does not result in the granting of additionalclass notations. It is not mentioned in the Register of Ships

of the Society.

2.2 Bureau Veritas certification

2.2.1 The certificates issued by the Society on behalf of theadministrations correspond to the forms of certificates rec-ommended by the International Labour Office for enteringthe appliances in the Cargo Gear Register.

2.2.2 Complete certification of a lifting appliance of a shipor an offshore unit includes:

approval of the drawings and examination of the docu-

ments listed in [4]

the test and survey certificates prior to the first use of theitems of loose gear such as blocks, hooks, shackles,swivels, chain cables, rings, rigging, lifting beams, etc.

the test and survey certificates prior to the first use of thesteel wire ropes and fibre ropes

the test and survey certificates prior to the first use of thewinches

survey of the fitting onboard in accordance with Sec 10,[8]

survey and certification of the general tests prior to firstuse in accordance with Sec 10, [9].

delivery of Bureau Veritas Cargo Gear Register (see[2.7]).

2.2.3 The test certificates as per [2.2.2] are also used whenperiodical re-tests are carried out and when tests are re-per-formed after repair, conversions or changes in elements.

2.3 Certification in compliance with specialnational rules

2.3.1 It is reminded that certification of lifting appliances incompliance with specific national regulations can be deliv-ered by the Society only when it is authorized to do so bythe competent National Authorities.

2.3.2 The forms used for the test certificates and the CargoGear Register are those prescribed by the specific nationalregulations.

If the specific national regulations have not defined specialforms of wording, the forms of the Society may be used. In

this case, the following is to be specified: the precise references of the regulations to be applied

the fact that the Surveyor of the Society acts as a compe-tent person recognized by the Authorities concerned

the test procedures required by the specific national reg-ulations if different from the procedures provided on theform used for the certificate.

2.3.3 The Cargo Gear Register is delivered if the interven-tions specified in [2.7.1] have been carried out to the Soci-ety satisfaction, considering the special requirements of thenational regulations, even if some of the above mentioned

interventions are not required by the regulations to beapplied. But if the specific national regulations include pro-visions in addition to those in [2.7.1], these provisions areto be complied with.

2.3.4 When provisions of the national regulations cannotbe complied with or when their interpreting is not clear, it isthe responsibility of the Owner or the Builder to take thenecessary steps with the competent authorities to obtain therequested derogations or explanations, and to inform theSociety accordingly.

2.3.5 The attention of Owners and Builders is drawn to thefact that the choice of the construction mark may be, in

some cases, implicitly prescribed by the national regula-tions applied, specially when the latter require inspection ofmaterials.

2.3.6 When the test load or the test conditions prescribedby the national regulations for the lifting appliances or theiraccessories are more severe that the provisions of this RuleNote, they are to be taken into account by the designer todetermine the scantlings.

2.3.7 When lifting appliances already in service are con-cerned, and with the same reserves as those stated above,the minimum interventions required are to be equivalent to

those specified in [2.7.1].

3 Classification

3.1 General

3.1.1 Ships or offshore units fitted with lifting appliancesmeeting the requirements of [2.3] may be assigned the fol-lowing additional class notations as mentioned in [2.2].

Classification results in issuance of the Cargo Gear Register.

3.1.2 In accordance with the provisions of Part A,

Chapter 1, of the Rules for Steel Ships or Part A, Chapter 1of the Rules for Offshore Units, and considering the provi-

sions in [2.3], the construction marks { , [ or are associ-ated with the class notations as per [2.2].


14/84

NR 526, Sec 1


3.2 Class notations

3.2.1 The class notations are as follows:

ALP or (ALP) for appliances for lifting at harbour, as per[1.1.1], item a)

ALM or (ALM) for appliances for lifting in offshore con-ditions, as per [1.1.1], item b)

ALS or (ALS) for appliances for lifting submarine craft,as per [1.1.1], item c).

3.2.2 One of the additional notations listed in [3.2.1] canbe granted only if the ship or offshore unit is or will be reg-istered in the Register of ships of the Society and, as a rule,if all the appliances for lifting comply with the criterias togrant the corresponding notations.

The criterias for granting the above mentioned class nota-tions are defined in [2.4] or [2.5].

3.2.3 The granting of one or several class notations ALP,ALM or ALS normally leads to the delivery of Bureau Veritascertificates on the basis of the international regulationsmentioned in [1.3.3] and [1.3.4]. It results, in particular, inthe issuance of the Bureau Veritas Inspection Cargo GearRegister (see [2.7]).

The Bureau Veritas Inspection Cargo Gear Register and thecorresponding certificates are, in most cases, acceptedinternationally; however, upon special request of theOwner, additional certification in compliance with special

national regulations may be delivered, provided the Societyis duly authorized to do so by the relevant National Author-ities. The opinion of the Society is to be required in thisrespect. This additional certification does not result in thegranting of a special notation. As a rule, in the case of dis-crepancy between the requirements of the national regula-tions and those of this Rule Note, the more severe of both ofthem apply. If there is a doubt, the opinion of the Societymay be required.

3.3 Construction marks

3.3.1 The construction mark{

is assigned when liftingappliances have been surveyed by the Society during theirconstruction, in accordance with the procedure detailed in[2.4.1].

3.3.2 The construction mark [ is assigned when liftingappliances are classed after construction, in compliancewith the procedure detailed in [2.4.2] and it is changingclass from an IACS Society at the time of the admission toclass.

3.3.3 The construction mark is assigned to lifting appli-ances where the procedure for the assignment of classifica-

tion is other than those detailed in [3.3.1] and [3.3.2], buthowever deemed acceptable and in compliance with[2.4.5].

3.4 Criteria for granting ALP, ALM or ALSclass notations

3.4.1 When a lifting appliance is surveyed by the Societyduring construction, it is submitted to the following require-

ments to grant the supporting ship or offshore unit one orseveral of the class notations ALP, ALM or ALS:

approval of drawings and examination of documentsrequired in [4]

inspection at works of materials in accordance with Sec10

construction survey and inspection at works of equip-ments in accordance with Sec 10

survey of tests at works prior to fitting onboard, in par-ticular certification of the loose gear in accordance with

Sec 10, [7]

survey of fitting onboard in accordance with Sec 10, [8]

survey and certification of the general tests before theappliance is put into service, in accordance with Sec 10,[9]

issuance of the Bureau Veritas Cargo Gear Register (see[2.7]).

Lifting appliances are to be submitted to examinations, andperiodical tests according to App 1 are required to maintainthe class notations.

3.4.2 When a lifting appliance has been surveyed by anIACS Society during its construction and is requested to beadmitted to class, it is subject to the following requirementsto grant the supporting ship or offshore unit one or severalof the class notations ALP, ALM or ALS:

examination of the drawings and documents required in[4] and submitted for information (see [2.4.2], Note 1)

examination of materials inspection certificates, con-struction survey attestations, test certificates at works forequipments and loose gear, and, if any, of the existingCargo Gear Register

survey of the lifting appliance concerned (see [2.4.2],Note 2)


Throrough examinations and periodical tests according toApp 1 are required for the class notations to be maintain.

Note 1: As a Rule, these drawings are to be marked with the stampsof the organization by which they were approved upon construction.

Note 2: The extent of this survey depends on the existing condi-tions of certification, on the general maintenance conditions andon the age of the lifting appliances. As a rule, general tests are notrequired if the existing certification for these tests (tests prior to firstuse and/or quinquenal renewal of tests) is valid.


15/84

NR 526, Sec 1


3.4.3 When the procedure adopted does not comply withthat detailed in [3.4.1] or [3.4.2] but the Society deems thatit is acceptable for the assignment of class, the constructionmark is assigned and the interventions to be carried out inorder to grant one or several class notations ALP, ALM orALS are as follows:

approval of the drawings and examination of the docu-ments required in [4] (see [2.4.3], Note 1)

examination of the certificates delivered after testing atworks of loose gear, and, possibly, of the existing CargoGear Register

survey of the lifting appliance concerned (see [2.4.3],Note 2)


examinations and periodical tests according to App 1 in

order to maintain the additional classification classnotations.

Note 1:

Upon agreement of the Society, the approval of drawings maynot be required if proof is given that these drawings have beenpreviously approved by a recognized organization. In such acase, the hereabove mentioned drawings and documents are tobe submitted for information.

When some drawings and documents are not available, theSociety is to appreciate whether it is possible to grant therequested class notations, considering the fact that a CargoGear Register has possibly been delivered by a recognized

organization or a National Authority. Particular measurementsor controls carried out aboard, and witnessed by a Surveyor ofthe Society, may be required.

The documents mentioned in [2.8.2], to be annexed to theCargo Gear Register, are to be submitted.

Note 2: The extent of this survey is to be defined according to thestate of the existing certification, the general state of maintenanceand the age of the lifting appliances. As a rule, a re-testing is notrequired if the existing certification relating to these tests (tests priorto first use and/or quinquenal renewal of tests) is valid. Checking ofthicknesses of structural elements is to be carried out on the liftingappliances the age of which is greater than, or equal to, 12 years.

3.4.4 The classification certificate, the test certificates, theCargo Gear Register and its attached documents are to bekept onboard the ship or the offshore unit and available tothe Surveyor of the Society at his request.

3.4.5 When the lifting appliances are built under the surveyof the Society in accordance with the provisions of [3.4.1],except for the provisions regarding inspection of materialsand equipments at works, one or several of the additionalmarks ALP, ALM or ALS may be granted to the ship or theoffshore unit.

In such a case, the Builder has to prove that the materials

and equipments used comply satisfactorily with the provi-sions of this Rules. The Surveyor may possible require tocheck it at random.

3.5 Criteria for granting (ALP), (ALM) or(ALS) class notations

3.5.1 Provisions of [3.4] are, as a rule, to be complied withto obtain one or several class notations (ALP), (ALM) or

(ALS). However when national regulations include provi-sions which do not agree with those of this Rule Note, theprovisions of the national regulations are normally to beapplied.

3.5.2 Attention is drawn to provisions from [2.3.4] to[2.3.6] to be applied.

3.5.3 The periodical surveys are to be carried out by theSociety in compliance with the requirements of the nationalregulations.

4 Cargo Gear Register

4.1 General

4.1.1 Bureau Veritas Inspection Cargo Gear Register is adocument which allows mainly:

to list all the lifting appliances of the ship or offshoreunit which have been certified

to record the periodical examinations and tests requiredin App 1 as well as the occasional inspections or tests

to write down the possible remarks of the Surveyor

to check the certification validity for the lifting appli-ances concerned.

4.1.2 The following documents or equivalent are to beattached to the Inspection Register:

general sketch showing lay-out and reference marks ofthe lifting appliances of the ship or offshore unit

document showing the main characteristics of each lift-ing appliance (SWL, minimum and maximum workingradius or load capacity chart, working area, etc.) and itsworking conditions (list and trim angles, maximum

wind in service, sea condition, etc.), stamped by theSociety

force diagram for each lifting appliance in every work-ing condition (different methods for hoisting, union pur-chase, etc.) showing the maximum forces applied to theitems of loose gear and main structures

for each lifting appliance, sketch giving useful particu-lars for correct reeving of ropes and position of everyitem of loose gear

for each lifting appliance, list of steel wire and fibreropes giving their characteristics (specially their mini-

mum breaking load) and list of every item of loose gearwith its SWL and its test load

for complex or special type lifting appliance, a workingand maintenance manual prepared by the Builder.


16/84

NR 526, Sec 1


In addition to the above-detailed attachments to the CargoGear Register, the manual relating to the lifting appliance isto include the following information:

design criteria

design standards

list of elements heavily loaded in service

material specifications

construction standards

inspection report during fabrication

sheaves design standards

cable specifications

description and maintenance instruction of brake system

design standards of pipings and electrical circuits

diagrams of the latter

description of safety devices

instruction for operating, mounting, dismounting andtransportation

instruction for maintenance.

This latter manual is to be kept near the appliance it isrelated to.

4.2 Criteria for issuance of Bureau VeritasCargo Gear Register

4.2.1 The appliance may be put down on Bureau VeritasCargo Gear Register when the following interventions are

carried out to the Societys satisfaction: Approval of the drawings and examination of the docu-

ments listed in [6].

examination of the test certificates at works of the itemsof loose gear such as blocks, hooks, shackles, swivels,chain cables, rings, rigging, lifting beams, etc

examination of the test certificates at works of the steelwire ropes and fibre ropes

survey of the fitting onboard in accordance with Sec 10,[8]

survey and certification of the general tests prior to firstuse in accordance with Sec 10, [9].

When lifting appliances already in service are concerned,the following interventions are carried out to the Societyssatisfaction:

examination of the drawings and documents required in[4] which are to be submitted for information (see [2.7.1],Note 1)

examination of the certificates delivered after testing atworks of loose gear, and possibly of the existing CargoGear Register

survey of the lifting appliances concerned (see [2.7.1],Note 2).

Note 1:

If the ship has not a Cargo Gear Register delivered by a recog-nized organization or a National Authority, the hereinabovementioned drawings are to be approved by the Society.

Upon agreement of the Society, the approval of drawings maynot be required if these drawings have been previouslyapproved by a recognized organization. In such a case, thehereabove mentioned drawings and documents are to be sub-mitted for information. Particular measurements or controlscarried out aboard, and witnessed by a Surveyor of the Society,

may be required. The documents mentioned in [4.1.2], to be annexed to the

Cargo Gear Register, are to be submitted in any case.

Note 2: The extent of this survey is to be defined according to thestate of the existing certification, the general state of maintenanceand the age of the lifting appliances. As a rule, a re-testing is notrequired if the existing certification relating to these tests (testingprior to first use and/or qinquenal renewal of tests) is valid. Checkingof thicknesses of structural elements is to be carried out on the liftingappliances the age of which is greater than or equal to 12 years.

4.2.2 The Bureau Veritas Cargo Gear Register can also beissued on the basis of intervention as per [2.2.2] or [3.4].

5 Various interventions

5.1 General

5.1.1 Upon special request of a Builder or the Owner, theSociety may carry out complete or partial certification of aparticular lifting appliance or of a special equipment. Inparticular, general approvals may be carried out when stan-dardized equipments are concerned.

These requests are to specify clearly whether special regula-tions are to be applied. In the absence of definite instruc-

tions, the Societys own rules as stated in this Rule Note areto be applied.

5.1.2 The requests for certification of a lifting appliance orof a category of lifting appliances fitted aboard a ship or anoffshore unit which is not classed with the Society are to bespecially examined.

5.1.3 On ships classed or not with the Society, the Survey-ors of the Society may carry out the periodical surveysrequired either by international regulations or by specificnational regulations when the Society is authorized to doso, issue certificates and stamp the Cargo Gear Register ofthe ship or of the offshore unit, provided that the generalmaintenance condition of the lifting appliances proves, sat-isfactory enough, that the various existing test certificatesare shown to the Surveyor and that the documents attachedto the Register are available in order.

5.1.4 At the Builders or Owners request, the Society may,in some cases, perform verification calculations throughtheir own processes, using for instance their structure analy-sis software for forces and stresses analysis.

5.1.5 Upon special request, the Surveyors of the Societymay also witness particular tests, ascertain damages orrepairs, or deliver attestations.

5.1.6 The above interventions normally result in issuanceof technical notes, attestations or certificates, as the casemay be.


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NR 526, Sec 1


6 Documents to be submitted

6.1 General

6.1.1 The drawings and documents listed in [6.2] and [6.3]are to be submitted for approval. The material specifications

are to be shown on construction drawings.

6.1.2 Relevant additional drawings and calculations may

be requested by the Society in complement to the hereafter

mentioned documents.

6.2 Lifting appliances

6.2.1 The following drawings and documents are to be sub-

mitted:

a) General sketch of the ship localizing the lifting appli-

ances and showing the working areas of each of them.

b) Rigging drawings for each lifting appliance showing

clearly the reeving of the ropes and the number of parts

in purchase tackles.

All the items of loose gear are to be marked and num-

bered on these drawings. The type of the blocks used

(blocks with plain bearings or roller-bearings) is to be

specified.

c) Force diagrams for each lifting appliance, in service

conditions.

When the forces are determined by calculation, the rel-

evant calculations are to be submitted for information

and the maximum forces determined in the various ele-

ments are to be written schematically for each lifting

appliance on a sketch regarded as the force diagram.

The force diagrams and the sketches mentioned above

are clearly to show the maximum forces applied to all

the loose gear items.

d) Drawings of structural parts of lifting appliances: struc-

ture carrying the luffing tackle and the hinged pin of the

jib, jib structure, structure of crane post.

The scantlings and the steel grade of the connecting

bolts with the crane post are to be specified. The rele-

vant calculations of the Manufacturer are to be attached

to these drawings, for information. When calculations

have been computed, they are to be supplied both with

computer data and with sufficient explanations to allow

to check the calculation process.

Upon special request, a general approval of a standard-

ized production may be granted by the Society to the

Manufacturer.

e) List of steel wire and fibre ropes giving constructiontype, nominal diameter, minimum effective breakingload and, possibly, the reference standard.

The metal cross-sectional area of the wire ropes used forshrouds and stays is also to be specified.

f) List of all items of loose gear, marked in accordancewith the drawings requested in item b) specifying theSWL and the test load of each item.

The construction drawings of items of loose gear as per[1.4.3] and of the other stationary or movable accesso-ries for which no separate test is asked are not requiredif their scantlings comply with national or internationalstandards, or with approved specifications. In such acase, the standards used are to be specified and the cor-responding elements are to be designated according tothese standards with mention of steel grade as per Sec

2, [1.1.6]. Upon special request, a general approval ofthe standards of the Manufacturers may be granted bythe Society. The drawings showing specially designedelements are to be submitted for approval in each par-ticular case.

6.2.2 Specifications of winches

Construction drawings of winches are not required whenstandardized production is concerned, provided referencesof use in service are supplied to the Society satisfaction.

When prototype is concerned, a technical file is to be sub-

mitted for information. This file is to include a detailed tech-nical specification, an operating manual, a general drawing,the constructional drawings of the main items and completecalculations of the Manufacturer. The test programme con-templated is to be sent for approval.

6.2.3 Hydraulic and/or electric schemes

The scantling drawings of load carrying hydraulic cylinders(for instance the luffing cylinders of an hydraulic crane) areto be submitted for approval (see Sec 8, [1.3]).

6.2.4 Description of safety devices (limit switches, overload

cut-out devices, alarms, etc.) is to be submitted for approval(see Sec 8, [1.3]).

6.3 Supporting structure of the lifting appliance

6.3.1 The following drawings are to be submitted:

a) Drawings of the structural parts of the ship or offshoreunit supporting the lifting appliance and carrying theforces to the hull structure.

b) Drawings of the structural parts of the ship or offshoreunit located in way of the fixing points of the shrouds,stays and other fastening fittings.

c) Drawings of the lifting appliance and the winch founda-tions.


18/84

NR 526, Sec 2


SECTION 2 CONSTRUCTIONAL ARRANGEMENTS

1 Materials

1.1 General

1.1.1 The provisions of this Section are applicable mainlyto lifting appliances used in port conditions.

For lifting appliances used in offshore conditions, the provi-sions of this Section are to be applied, as the case may be.

1.1.2 The requirements of this Section are based on adesign temperature not less than 10C. Other cases are to

be subject to special consideration of the Society.1.1.3 The materials used to manufacture the fixed parts ofthe lifting appliances, and their connections with the shipstructure (crane posts, masts, seatings, etc.), as well as thoseused locally to reinforce this structure, are to comply withthe requirements of NR216 Materials and Welding.

However, the use of materials complying with internationalor national standards and the characteristics of which areequivalent to those required by NR216 Materials and Weld-ing may be accepted by the Society on a case by case basis.

1.1.4 The use of steel with very high mechanical character-istics (minimum specified yield stress greater than

355 N/mm2) is to be examined by the Society on a case bycase basis.

In such a case, a detailed technical specification stating themanufacturing process, mechanical and chemical charac-teristics, utilization conditions (ability for welding and form-ing) and the possible heat-treatments is to be submitted tothe Society.

1.1.5 Materials used to manufacture primary elements ofhigh capacity lifting appliances such as heavy derrickbooms, jibs and main load carrying structures of cranes andgantry-cranes, lifting beams, are to comply with NR216Materials and Welding.

However the materials used to manufacture elements otherthan those as per [1.1.3] may be chosen according to inter-national or national standards or to approved specifications.The selection of materials is to be submitted to the Societyfor acceptance.

1.1.6 For the construction of certain elements, reference isto be made to the special requirements of Articles dealingwith these elements. In particular for steel wire ropes andfibre ropes, the requirements of Sec 6, [2.1] and Sec 6, [2.2]apply respectively.

1.1.7 No component part of a lifting appliance and noaccessory is to be manufactured in wrought iron.

1.1.8 The use of non-ferrous or synthetic materials is to beespecially examined by the Society.

1.2 Steel plates and sections

1.2.1 Steel plates and sections used to manufacture com-ponents which are within the scope of interventions of theunit are normally in hull steel grades as defined in NR216Materials and Welding. Their minimum yield stress is as fol-lows:

235 N/mm2 for ordinary hull steel grades A, B, D or E

315 N/mm2 for high tensile steel grades AH32, DH32 orEH32

355 N/mm2 for high tensile steel grades AH36, DH36 orEH36.

The above values are valid for thicknesses up to 100 mm.

1.2.2 The hull steel grades to be used for manufacturingstructural elements as per [1.2.1] (plate welded structures ortubes made out of welded rolled up plates) are defined inTab 1 according to the plate thicknesses.

Table 1 : Hull steel grades for plates

1.2.3 As a rule, the requirements in [1.2.2] are applicableto sections (angle bars, flat bars, etc.) which form the loadcarrying structures and to those used to stiffen plates whenthey contribute to the general structural strength.

1.2.4 Steel grades of seamless pipes and welded pipes areto be selected based on the same principles as those given

for plates and opened sections.

1.2.5 The use of grades as per Ch 2, Sec 1, [9] of NR216Materials and Welding, is to be considered for areas subjectto high stresses in through thickness direction.

1.2.6 The specifications of the materials used are to beshown on the construction drawings submitted forapproval. Failing this, the steel used would be supposed tobe normal strength hull steel grade A, as defined in NR216Materials and Welding.

1.2.7 When plates of thickness e are cold formed, the fold-ing radius r is not to be, as a rule, lower than the followingvalue:

r = 2,5 e when ordinary hull steel is concerned

r = 3,0 e when high tensile steel is concerned.

Plate thickness e, in mm Hull steel grade

e 20

20 < e 25

25 < e 40

40 < e

A or AH

B or AH

D or DH

E or EH


19/84

NR 526, Sec 2


1.2.8 When plates are highly stressed in the through thick-ness direction, the Society may require, in special cases, theuse of plates of grade Z quality complying with Ch 2, Sec 1,[9], of NR216 Materials and Welding in order to minimizethe risk of lamellar tearing.

1.3 Weldings

1.3.1 Selection of materials in welded construction takesinto account:

the degree of importance in the whole structure of theconsidered element

the design temperature of the element

the thickness of the element

the stress relieving treatment performed after welding.

1.3.2 Hull steel grades to be used for structural part sup-porting the appliance and welded to the ship structure areto be selected in accordance with Pt B, Ch 4, Sec 1, of theRules for Steel Ships.

1.3.3 Structure is usually to be considered as not beingstress relieved.

1.4 Steel forgings

1.4.1 The provisions of Ch 2, Sec 3, of NR216 Materialsand Welding, apply to steel forgings considering the partic-ulars of [1.4.2] and [1.4.3].

1.4.2 The minimum guaranteed values for tensile strengthand yield stress are to be specified on the drawings submit-ted for approval. Other characteristics are to comply withthe requirements of Ch 2, Sec 3, of NR216 Materials andWelding.

1.4.3 The chemical composition and especially the carboncontent of the forged parts intended to form a weldedassembly are especially defined in Ch 2, Sec 3, of NR216Materials and Welding.

1.5 Steel castings

1.5.1 The provisions of Ch 2, Sec 4, of NR216 Materialsand Welding apply to steel castings, considering the partic-ulars of [1.5.2] to [1.5.4].

1.5.2 The minimum guaranteed values for tensile strength andyield stress are to be specified on the drawings submitted forapproval. Other characteristics are to comply with the require-ments of Ch 2, Sec 4, [1.8], of NR216 Materials and Welding.

1.5.3 The chemical composition and especially the carboncontent of the steel castings intended to form a weldedassembly are especially defined in Ch 2, Sec 4, [1.6.4], of

NR 216 Materials and Welding.

1.5.4 Highly stressed steel castings are to be submitted toappropriate non-destructive examination.

1.6 Iron castings

1.6.1 The provisions of Ch 2, Sec 5, of NR216 Materialsand Welding apply to iron castings, considering the particu-lars of [1.6.2] to [1.6.4].

1.6.2 As a rule, the use of grey iron, malleable iron or sphe-roidal graphite cast iron with either combined ferritic/per-litic structure or perlitic structure is allowed only formanufacturing block sheaves or low stressed elements ofsecondary importance.

1.6.3 The use of spheroidal graphite cast iron (SG iron)instead of cast steel may be accepted by the Society, pro-vided that:

concerned part is not intended to be part of a weldedassembly

requirements of NR216 Materials and Welding for SGirons are complied with

tensile properties are specified on the drawing submit-ted for approval.

1.6.4 As a rule, welding is forbidden on iron castings, evenfor repair of casting defects.

1.7 Bolting

1.7.1 When standardized bolts are used for load carryingconnections in the manufacturing of lifting appliances, thescrews and nuts are to be of the steel quality grades definedin Tab 2 in accordance with the requirements of the ISO898-june 09. For the screws, this table specifies also thenominal tensile strength R and the yield stress Re which are

to be taken into account in strength calculations.

Table 2 : Steel quality grade marks

for screws and nuts

1.7.2 In a bolt (screw + nut), the quality grade mark of thenut is to be the one corresponding to the first figure of thedesignation symbol of the quality grade mark of the screw,assuming the nut is of normal height (0,8 times the nominal

diameter of the screw).

1.7.3 The designation symbol of the steel quality grademark is to be indicated on each screw and nut used.

Quality grade marks forscrews

6.8 8.8 10.9 12.9

Nominal tensile strength

of screws, in N/mm2 600 800 1 000 1 200

Yield stress of the

screws, in N/mm2480 640 900 1 080

Quality grade marks fornuts

6 8 10 12

Note 1: Alternatively, other steel quality grades defined bynational standards may be accepted


20/84

NR 526, Sec 2


1.7.4 For assemblies with prestressed high strength bolts,the quality grade marks of the screws are to be 8.8, 10.9 or12.9 and the quality grade marks of the nuts 8, 10 or 12respectively. The quality of the washers are to be appropri-ate to the quality grade marks of the screws and nuts.

Screw threading is to be obtained by rolling, exclusive ofany other process.

An attestation for conformity of the bolts and screws withrecognized national or international standards may berequired.

2 Constructional arrangements

2.1 Minimum thickness

2.1.1 Thickness of crane pedestals is to be not less than that

defined in Tab 3 with respect to the SWL P of the crane.

2.1.2 Thickness of the component plates of the load carry-ing structural parts of the cranes is to be not less than 6 mm.

When tubular structures are concerned, tube thickness is tobe not less than 4 mm (except for crane pedestals, the mini-mum thickness of which is given in Tab 3).

Table 3 : Minimum thickness of crane pedestals

2.2 Diameter/thickness ratio for crane pedestals

of circular cross-section

2.2.1 For crane pedestals of circular cross-section, D/e ratiobetween the external diameter D, in mm, and the thicknesse, in mm, of each considered cross-section is not to exceedeither 150 nor the value given in Tab 4 according to theSWL P of the crane and the design yield stress Re , in

N/mm2, of the crane pedestal as defined in [1.3.1].

Table 4 : Crane pedestals of circular cross-section:

D/e ratio

2.2.2 For structural elements of circular cross-section(exclusive of crane pedestals), D/e ratio is not to exceed2/3 of the value required in [2.2.1].

2.2.3 When the maximum combined stress cb , defined by

the strength criteria as per Sec 4, [1.3.1], is lower than theallowable stress Re given in Sec 4, [1.3.1], D/e ratio from

Tab 4 may be increased in ratio:

2.3 Width/thickness ratio of plane walls

2.3.1 Ratio b/e between the width b, in mm, of an unstiff-ened plane wall (or spacing between the stiffeners of thiswall) and its thickness e, in mm, is to be not greater than:

2.3.2 When the maximum combined stress cb defined by

the strength criteria as per Sec 4, [1.3.1] is lower than theallowable stress Re (see Sec 4, [1.3.1]), the b/e ratio may

be taken equal to the following maximum value:

Ratio b/e is not to exceed 100.

2.3.3 If the requirements as per [2.3.1] to [2.3.2] do notentirely comply with the strength of plates and associatedstiffeners, local buckling is to be justified by calculations, tothe satisfaction of the Society (see Sec 4, [1.5]).

2.4 Means of access

2.4.1 All lifting appliances and equipment are to be pro-vided with means of access.

2.4.2 Vertical and slightly sloped ladders (angle of slopewith the vertical < 15) may be provided with single rungs25 mm minimum in diameter (circular section rungs) or22 x 22 mm2 minimum in section (square section rungs).

Vertical ladders over 3 m in height are to be provided withguard hoops.

2.4.3 Ladders whose angle of slope with the verticalexceeds 15 are to be fitted either with steps or with pairs ofrungs, the clear gap of twin rungs being 5 cm maximum.

Such ladders are to be provided with suitable hand-rails.

2.4.4 Ladder uprights are to extend 1 m at least above land-ing platform.

2.4.5 Catwalks and landings are to be fitted with guard-

rails 1 m in height minimum and manrope at mid-height.

2.4.6 Access ladders and catwalks are to be firmly securedat sufficiently close intervals.

SWL of crane P, in t Minimum thickness emin , in mm

P 1

1 < P < 5P 5

6,0

3/8 (P + 15)7,5

SWL of the crane P, in t D/e ratio

P 5

5 < P < 160

P 160

23500Re

----------------

47000PRe P 5+( )------------------------

45600Re

----------------

Re

cb---------

be---

720

Re----------

be---

900

Re----------

Recb

---------= when cb 0 63Re,

be---

1610

Re------------- 1 0 8

cbRe---------,= when cb 0 63Re,>


21/84

NR 526, Sec 2


2.5 Constructional arrangements

2.5.1 As a rule, the crane structures are to be strengthenedlocally by means of additional stiffeners, transverse webplates, connecting brackets or by local increase in thickness

in way of the concentrated applied forces and at places sub-jected to concentrated stresses due to discontinuity inshape.

2.5.2 As far as possible, strength continuity of the structuralparts subjected to tensile stresses is to be ensured by contin-uous plates or by butt welding. Strength continuity of suchstructures by means of fillet welds on transverse plate is tobe avoided. Use of Z quality plate is recommended for suchtransverse plate.

In accordance with the above, the crane pedestal structuresare to be continuous through the uppermost attachment

deck, unless otherwise accepted by the Society.

2.5.3 Drain holes or other draining arrangements are to beprovided in the structural parts where sea water or rain maystagnate.

All the structural parts are to be designed to allow inspec-tions and are to be accessible for painting except whensmall dimensions make it impossible. In the latter case,closed and watertight constructions are to be provided.

2.6 Local scantlings of attachment decks

2.6.1 As a rule, the local thickness, in mm, of the decks onwhich the pedestal is attached is to be not less than:

where:

E : Local spacing, in m, of the deck stiffeners

Re(d) : Minimum yield stress, in N/mm2, of the deck

plate steel.

2.6.2 In addition, for crane pedestals of circular cross-sec-tion, the local thickness, in mm, of the upper and lowerattachment decks is to be not less than the greater of thetwo values:

t3 = 0,5 e

where:

e, D : Thickness, in mm, and external diameter, in m,respectively, of the pedestal at the uppermostdeck level

Re(c) , Re(d): Minimum values of the yield stress, in N/mm2,of, respectively, the pedestal plate and the deckplate

H : Clear height, in m, between the two attachmentdecks.

The value of t2 is given assuming that the crane is attached

in the middle of a deck area. If the crane is attached to afree edge of deck or connected to it by large brackets, thevalue of t2 as obtained hereabove is to be multiplied by two.

If the crane is fixed to a strip of deck of length l d, in m, both

sides of which are free and at a distance d, in m, from thefarthermost end of this strip of deck, the value t2 is to be

multiplied by 2d/l d ratio.

2.6.3 In some cases, checking of the scantlings of theattachment decks by direct calculations may be required,considering the provisions of Sec 4, [3.2].

2.6.4 When the thickness of the attachment decks is not

sufficient to meet the requirements given in [2.6.1] to[2.6.3], a thick plate is to be inserted in the deck plating.The dimensions of this inserted plate are not to be lowerthan twice the dimensions of the cross-section of the cranepedestal. As a rule, use of doubling plates is not permitted.

2.6.5 In addition to the provisions as per [2.6.1] to [2.6.4]and with respect to the longitudinal strength of the ship andto the local stress concentrations, the Society may requirelocal increase of deck thickness and/or fitting of a dia-phragm plate inside the crane pedestal where the latter ispassing through the deck.

1 2E235

Re d( )--------------,

t2 0 8eD

H

-----Re c( )

Re d( )----------,=


22/84

NR 526, Sec 3


SECTION 3 DATA FOR CALCULATION

1 Data

1.1 General

1.1.1 Scantlings of shipboard lifting appliances are to becalculated taking into account the static and dynamic loadsapplied under contemplated operating conditions.

1.1.2 Strength calculations of the various components ofcranes are to be made under operating conditions takinginto account the forces due to:

SWL as per Sec 1, [1.4.2] increased by the dead weightof the lower purchase block and permanent attachmentsprovided to hook loads (hook, shackle, permanent lift-ing beam, spreader or similar lifting aid, etc.)

dead weight of crane structure and accessories

ships static list and trim

ships dynamic list in operating conditions

dynamic amplification factor due to operating conditions

vertical dynamic effect due to hoisting of load (theeffects of vertical accelerations due to lifting motionsand the effects of vertical oscillations due to snatch and

putting down of load are assumed to be included in thevertical dynamic effect

in addition to the above, and depending on the type ofappliance, other significant effects are to be taken intoaccount (for example, horizontal tangential accelerationdue to slewing motion). Radial (centrifugal) accelerationdue to slewing motion may be disregarded in case ofslewing crane.

1.1.3 Operating conditions and main characteristics ofcranes are to be specified, in particular:

duty category depending on kind and rate of service

contemplated SWL or diagram of lifting capacity according to jib radius

maximum permissible list and trim angles

dead weight of crane component parts and position ofrespective centres of gravity, in particular weight oflower purchase block and hook, weight of crane jib andweight distribution over jib length, weight of counter-balance, if applicable, and total weight of crane

hoisting speed

horizontal tangential acceleration at jib head with craneat maximum radius due to slewing motion, or, alterna-tively, angular slewing speed and minimum braking time

maximum wind speed authorized during operation

type of block sheaves (sheaves with plain or roller bearings)

dynamic amplification factor.

1.1.4 Efficiency of sheaves and tackles is to be taken intoaccount as specified in App 2, [1.2] and App 2, [1.3] todetermine the maximum forces in hoisting and toppingropes.

1.2 Duty categories

1.2.1 Depending on the nature of their duty and the rate ofoperation, the appliances are divided into four duty catego-ries:

category I: appliances very seldom used at their nomi-nal capacity, such as cranes intended for the handling ofspare parts, stores or equipment (appliances intendedfor the handling of flexible hoses onboard oil tankers orof discharging equipment onboard gas carriers oronboard ships carrying dangerous chemicals belong tocategory II)

category II: appliances regularly used for loading andunloading cargoes and frequently operated at less than75% of their nominal capacity, such as multi-purposecranes

category III: appliances extensively used for loads

approaching their maximum capacity, such as appli-ances intended for the handling of containers whentheir lifting capacity is approximately that of the weightof containers handled

category IV: grab appliances used for handling of looseor granulated products.

1.2.2 The nature and the intensity of intended crane dutyare taken into account in calculations by increasing theloads considered (excluding wind loads) using the coeffi-cient 0 defined in Tab 1 and depending on the duty cate-

gory indicated in [1.2.1].

Table 1 : Coefficient 0

1.3 Dead weights

1.3.1 Builders and manufacturers are to state the dead-weights which are to be considered in the calculations.

1.3.2 For usual low capacity lifting appliances, the weightof the cargo tackle may be disregarded to determine themaximum tension in the cargo runner.

Duty categories 0

I

II

III

IV

1,00

1,03

1,06

1,25


23/84

NR 526, Sec 3


2 Influence of self motions

2.1 General

2.1.1 Influence of appliances self motion is described by

mean of coefficients:

G factors express the effects on dead weights of accel-

eration/decelerations due to motions, such as revolvingand luffing for cranes or sudden start/stop with bumpingfor travelling gantries

C factors express in particular acceleration/decelera-

tion effects of functional motions of hoisted load.

2.1.2 For cranes, GX , GY , GZ ,CX, CY and CZ may be

evaluated as indicated in [2.2] and [2.1.3].

2.1.3 Influence of hoisting motion

Besides, CZ may be evaluated as follows:

CZ = 1 + 0,3 a V

where:

a : for structures supported by ropes or hydrau-lic jacks (cranes): a = 1

for rigid structures (gantries or overheadtravelling cranes): a = 2

V : Maximum hoisting speed of service load, inm/s, which is to be taken neither greaterthan 1,0 nor less than:

0,50 when P 50 t

0,333 when P 60 t

0,25 when a = 2

GZ = 1

2.2 Influence of slewing motion of cranes

2.2.1The effect of horizontal tangential accelerations dueto slewing (starting and braking), on service loads and crane

jib are to be considered.

2.2.2 If acceleration 0, in m/s, at the jib head is unknown,the following value is to be applied:

where:

x0 : Maximum radius, in m, of the crane (see Fig 2)

N : Maximum slewing speed, in r/min, at maximum

radius x0t : Braking time, in s, of slewing motion when the

crane withstands the SWL corresponding toradius x0.

Acceleration Gi affecting jib dead weight may be deter-

mined as follow for xi = x1:

where xi is the distance, in m, between the centre of gravityof the dead weight of item ni and the vertical crane axis(see Fig 2).

2.2.3 The horizontal tangential acceleration effect oncranes jib and SWL may be taken into account by consider-ing the following dynamic coefficients:

2.2.4 Radial (centrifugal) acceleration due to slewingmotion may be disregarded. (See [1.1.2]).

3 Influence of external conditions

3.1 General

3.1.1 Influence of external operation conditions isdescribed by mean of coefficients:

G factors express the effects on dead weights of accel-

erations due to ship motion and accelerations in con-templated environment/sea state

c factors express in particular influence of environmen-

tal conditions on hoisted load.

3.1.2 CX , CY on the one hand and GX , GY , GZ on theother hand may be calculated as per [3.4] on the basis of:

where l and are respectively static list and trim anglesas per [3.2]

d dynamic list in contemplated operation conditions

CZ coefficient (see [3.3]).

3.2 List and trim

3.2.1 Lifting appliances are to be designed to operate safelyin the following possible conditions, as a minimum, for har-bour operations:

positive trim of 2 (fore part of the ship raised)

negative trim of 1 (aft part of the ship raised)

list of 5

whatever the position of the load.

P 100+6P

------------------- when 50 t < P < 60 t

0260-------

Nx0t

----------=

Gi 0xix0-----=

GX i

2N2

9000------------- xi=

GY i1g--- Gi=

CX GX=

CY1g--- 0=

S l2

2

+=


24/84

NR 526, Sec 3


3.2.2 Values for list and trim must be specified either by theOwner or the Builder. They are to be determined in takinginto account the stability calculations made considering allthe lifting appliances to be used at the same time as well asthe ballasting capabilities of the ship. It will be consideredthat these values do not exceed those as per [3.2.1], ifunspecified.

Ballasting capabilities of the ship in this present Rule Note,it is assumed that enable to limit the list of the ship to 12.

3.2.3 If the actual values of static list and trim are lowerthan or equal to the values as per [3.2.1], the latter are to beconsidered as minimum values unless otherwise agreedwith the Society.

3.2.4 Values different from those defined for list and trimangles may possibly be accepted by the Society providedthat special arrangements are made to ensure that they are

not exceeded in operation and provided suitable instruc-tions are attached to the ships Cargo Gear Register.

3.3 Environmental conditions

3.3.1 In addition to acceleration effects on appliance deadweight and lifted load due to gravity and functional motionsof the appliance, environmental effects and special operat-ing conditions are to be taken into account.

Those environmental conditions and the support character-istics are described by dynamic amplification factors, ofwhich values depend on environmental conditions. These

values should be supported by theoretical calculations ormodel test results when the lifting appliance is anticipatedto work in areas with unreliable environmental conditionsor when motions of support cannot be reliably assessed.

However, it can be accepted, lacking information, to con-sider, for normal operating conditions, following provisionalvalues of cz coefficient (taken out of curves Fig 1, with

respect to Tab 2) as representative for support kind of opera-tion and sea conditions.

Table 2 : Determination of CZ curve

3.3.2 For harbour conditions (still water), Fig 1 is to be dis-regarded, and cz is to be taken equal to 1.

3.4 Coefficients determination

3.4.1 Factors CX and CY may be evaluated as the maxi-mum value of:

1CX = [sin (S + d)] (0,75 + 0,25 CZ)

2CX = sin(S) + 0,30 (CZ 1)

1CY = [sin (S + d)] (0,75 + 0,25 CZ)

2CY = sin (S) + 0,30 (CZ 1)

Factors G depend on same parameters as factors C.

For supply cranes on fixed platforms, GZ is equal to 1.

Figure 1 : Dynamic amplification factor CZ

OperationsBeaufort

seaconditions

Curve number

Fixedplatforms

Mobileplatforms

Barges Ships

Approvisionment Max 5 4 4 5 6

Work4 2 3 4 5

2 1 2 3 4

Internal handling Max 5 (cz = 1) 1 2 3


25/84

NR 526, Sec 3


For the other lifting appliances, for normal operating condi-tions and for a preliminary design, GX and GY may be con-

sidered as the maximum of:

1GX = sin (S + d)

2GX = sin (S) + 0,15 (CZ 1)

1GY = sin (S + d)

2GY = sin (S) +

Rules for the Certification

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