Rules for the Classification of Floating Docks - Boat Design Net

Rules for the Classificationof Floating DocksEffective from 1 January 2010RINAVia Corsica, 12 - 16128 Genova - ItalyTel. +39 01053851 - Fax: +39 0105351000E-MAIL info@rina.org - WEB www.rina.org

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Definitions:"Rules" in these General Conditions means the documents belowissued by the Society:- Rules for the Classification of Ships or other special units;- Complementary Rules containing the requirements for product,plant, system and other certification or containing the requirementsfor the assignment of additional class notations;- Rules for the application of statutory rules, containing the rules toperform the duties delegated by Administrations;- Guides to carry out particular activities connected with Services;- Any other technical document, as for example rule variations orinterpretations.“Services” means the activities described in Article 1 below, renderedby the Society upon request made by or on behalf of theInterested Party.“Society” or “RINA” means RINA S.p.A. and/or all the companiesin the RINA Group which provide the Services.“Surveyor” means technical staff acting on behalf of the Society inperforming the Services.“Interested Party” means the party, other than the Society, havingan interest in or responsibility for the Ship, product, plant or systemsubject to classification or certification (such as the owner ofthe Ship and his representatives, the ship builder, the enginebuilder or the supplier of parts to be tested) who requests the Servicesor on whose behalf the Services are requested.“Owner” means the registered Owner, the ship Owner, the manageror any other party with the responsibility, legally or contractually,to keep the ship seaworthy or in service, having particularregard to the provisions relating to the maintenance of class laiddown in Part A, Chapter 2 of the Rules for the Classification ofShips or in the corresponding rules indicated in the specific Rules.“Administration” means the Government of the State whose flagthe Ship is entitled to fly or under whose authority the Ship isauthorised to operate in the specific case."Ship" means ships, boats, craft and other special units, as forexample offshore structures, floating units and underwater craft.Article 11.1. - The purpose of the Society is, among others, the classificationand certification of ships and the certification of their partsand components.The Society:- sets forth and develops Rules;- publishes the Register of Ships;- issues certificates, statements and reports based on its surveyactivities.1.2. - The Society also takes part in the implementation of nationaland international rules and standards as delegated by various Governments.1.3. – The Society carries out technical assistance activities onrequest and provides special services outside the scope of classification,which are regulated by these general conditions, unlessexpressly excluded in the particular contract.Article 22.1. - The Rules developed by the Society reflect the level of itstechnical knowledge at the time they are published. Therefore, theSociety, though committed, also through its research and developmentservices, to continuous updating, does not guarantee theymeet state-of-the-art science and technology at the time of publicationor that they meet the Society's or others' subsequent technicaldevelopments.2.2. - The Interested Party is required to know the Rules on thebasis of which the Services are provided. With particular referenceto Classification Services, special attention is to be given to theRules concerning class suspension, withdrawal and reinstatement.In case of doubt or inaccuracy, the Interested Party is to promptlycontact the Society for clarification.The Rules for Classification of Ships are published on the Society'swebsite: www.rina.org.2.3. - The Society exercises due care and skill:- in the selection of its Surveyors- in the performance of its Services, taking into account the level ofits technical knowledge at the time the Services are performed.2.4. - Surveys conducted by the Society include, but are not limitedto, visual inspection and non-destructive testing. Unless otherwiserequired, surveys are conducted through samplingtechniques and do not consist of comprehensive verification ormonitoring of the Ship or of the items subject to certification. Thesurveys and checks made by the Society on board ship do not necessarilyrequire the constant and continuous presence of the Surveyor.The Society may also commission laboratory testing,underwater inspection and other checks carried out by and underGENERAL CONDITIONSthe responsibility of qualified service suppliers. Survey practicesand procedures are selected by the Society based on its experienceand knowledge and according to generally accepted technicalstandards in the sector.Article 33.1. - The class assigned to a Ship, like the reports, statements, certificatesor any other document or information issued by the Society,reflects the opinion of the Society concerning compliance, atthe time the Service is provided, of the Ship or product subject tocertification, with the applicable Rules (given the intended use andwithin the relevant time frame).The Society is under no obligation to make statements or provideinformation about elements or facts which are not part of the specificscope of the Service requested by the Interested Party or on itsbehalf.3.2. - No report, statement, notation on a plan, review, Certificateof Classification, document or information issued or given as partof the Services provided by the Society shall have any legal effector implication other than a representation that, on the basis of thechecks made by the Society, the Ship, structure, materials, equipment,machinery or any other item covered by such document orinformation meet the Rules. Any such document is issued solelyfor the use of the Society, its committees and clients or other dulyauthorised bodies and for no other purpose. Therefore, the Societycannot be held liable for any act made or document issued byother parties on the basis of the statements or information given bythe Society. The validity, application, meaning and interpretationof a Certificate of Classification, or any other document or informationissued by the Society in connection with its Services, isgoverned by the Rules of the Society, which is the sole subjectentitled to make such interpretation. Any disagreement on technicalmatters between the Interested Party and the Surveyor in thecarrying out of his functions shall be raised in writing as soon aspossible with the Society, which will settle any divergence of opinionor dispute.3.3. - The classification of a Ship, or the issuance of a certificate orother document connected with classification or certification andin general with the performance of Services by the Society shallhave the validity conferred upon it by the Rules of the Society atthe time of the assignment of class or issuance of the certificate; inno case shall it amount to a statement or warranty of seaworthiness,structural integrity, quality or fitness for a particular purposeor service of any Ship, structure, material, equipment or machineryinspected or tested by the Society.3.4. - Any document issued by the Society in relation to its activitiesreflects the condition of the Ship or the subject of certificationor other activity at the time of the check.3.5. - The Rules, surveys and activities performed by the Society,reports, certificates and other documents issued by the Society arein no way intended to replace the duties and responsibilities ofother parties such as Governments, designers, ship builders, manufacturers,repairers, suppliers, contractors or sub-contractors,Owners, operators, charterers, underwriters, sellers or intendedbuyers of a Ship or other product or system surveyed.These documents and activities do not relieve such parties fromany fulfilment, warranty, responsibility, duty or obligation (also of acontractual nature) expressed or implied or in any case incumbenton them, nor do they confer on such parties any right, claim orcause of action against the Society. With particular regard to theduties of the ship Owner, the Services undertaken by the Societydo not relieve the Owner of his duty to ensure proper maintenanceof the Ship and ensure seaworthiness at all times. Likewise, theRules, surveys performed, reports, certificates and other documentsissued by the Society are intended neither to guarantee thebuyers of the Ship, its components or any other surveyed or certifieditem, nor to relieve the seller of the duties arising out of thelaw or the contract, regarding the quality, commercial value orcharacteristics of the item which is the subject of transaction.In no case, therefore, shall the Society assume the obligationsincumbent upon the above-mentioned parties, even when it isconsulted in connection with matters not covered by its Rules orother documents.In consideration of the above, the Interested Party undertakes torelieve and hold harmless the Society from any third party claim,as well as from any liability in relation to the latter concerning theServices rendered.Insofar as they are not expressly provided for in these GeneralConditions, the duties and responsibilities of the Owner and InterestedParties with respect to the services rendered by the Societyare described in the Rules applicable to the specific Service rendered.

Article 44.1. – Any request for the Society's Services shall be submitted inwriting and signed by or on behalf of the Interested Party. Such arequest will be considered irrevocable as soon as received by theSociety and shall entail acceptance by the applicant of all relevantrequirements of the Rules, including these General Conditions.Upon acceptance of the written request by the Society, a contractbetween the Society and the Interested Party is entered into, whichis regulated by the present General Conditions.4.2. – In consideration of the Services rendered by the Society, theInterested Party and the person requesting the service shall bejointly liable for the payment of the relevant fees, even if the serviceis not concluded for any cause not pertaining to the Society.In the latter case, the Society shall not be held liable for non-fulfilmentor partial fulfilment of the Services requested. In the event oflate payment, interest at the legal current rate increased by 2%may be demanded.4.3. - The contract for the classification of a Ship or for other Servicesmay be terminated and any certificates revoked at therequest of one of the parties, subject to at least 30 days' notice tobe given in writing. Failure to pay, even in part, the fees due forServices carried out by the Society will entitle the Society to immediatelyterminate the contract and suspend the Services.For every termination of the contract, the fees for the activities performeduntil the time of the termination shall be owed to the Societyas well as the expenses incurred in view of activities alreadyprogrammed; this is without prejudice to the right to compensationdue to the Society as a consequence of the termination.With particular reference to Ship classification and certification,unless decided otherwise by the Society, termination of the contractimplies that the assignment of class to a Ship is withheld or, ifalready assigned, that it is suspended or withdrawn; any statutorycertificates issued by the Society will be withdrawn in those caseswhere provided for by agreements between the Society and theflag State.Article 55.1. - In providing the Services, as well as other correlated informationor advice, the Society, its Surveyors, servants or agentsoperate with due diligence for the proper execution of the activity.However, considering the nature of the activities performed (seeart. 2.4), it is not possible to guarantee absolute accuracy, correctnessand completeness of any information or advice supplied.Express and implied warranties are specifically disclaimed.Therefore, except as provided for in paragraph 5.2 below, and alsoin the case of activities carried out by delegation of Governments,neither the Society nor any of its Surveyors will be liable for anyloss, damage or expense of whatever nature sustained by any person,in tort or in contract, derived from carrying out the Services.5.2. – Notwithstanding the provisions in paragraph 5.1 above,should any user of the Society's Services prove that he has suffereda loss or damage due to any negligent act or omission of the Society,its Surveyors, servants or agents, then the Society will paycompensation to such person for his proved loss, up to, but notexceeding, five times the amount of the fees charged for the specificservices, information or opinions from which the loss or damagederives or, if no fee has been charged, a maximum of onehundred thousand Euro. Where the fees charged are related to anumber of Services, the amount of the fees will be apportioned forthe purpose of the calculation of the maximum compensation, byreference to the estimated time involved in the performance of theService from which the damage or loss derives. Any liability forindirect or consequential loss, damage or expense is specificallyexcluded. In any case, irrespective of the amount of the feescharged, the maximum damages payable by the Society will notbe more than 1 million Euro. Payment of compensation under thisparagraph will not entail any admission of responsibility and/orliability by the Society and will be made without prejudice to thedisclaimer clause contained in paragraph 5.1 above.5.3. - Any claim for loss or damage of whatever nature by virtue ofthe provisions set forth herein shall be made to the Society in writing,within the shorter of the following periods: THREE MONTHSfrom the date on which the Services were performed or THREEMONTHS from the date on which the damage was discovered.Failure to comply with the above deadline will constitute an absolutebar to the pursuit of such a claim against the Society.Article 66.1. - Any dispute arising from or in connection with the Rules orwith the Services of the Society, including any issues concerningresponsibility, liability or limitations of liability of the Society, willbe determined in accordance with Italian Law and settled througharbitration assigned to a board of three arbitrators who will proceedin compliance with the Rules of the Chamber of Nationaland International Arbitration of Milan. Arbitration will take placein Genoa, Italy.6.2. - However, for disputes concerning non-payment of the feesand/or expenses due to the Society for services, the Society shallhave the right to submit any claim to the jurisdiction of the Courtsof the place where the registered or operating office of the InterestedParty or of the applicant who requested the Service islocated.In the case of actions taken against the Society by a third partybefore a public Court, the Society shall also have the right to summonthe Interested Party or the subject who requested the Servicebefore that Court, in order to be relieved and held harmlessaccording to art. 3.5 above.Article 77.1. - All plans, specifications, documents and information providedby, issued by, or made known to the Society, in connectionwith the performance of its Services, will be treated as confidentialand will not be made available to any other party other than theOwner without authorisation of the Interested Party, except as providedfor or required by any applicable international, European ordomestic legislation, Charter or other IACS resolutions, or orderfrom a competent authority. Information about the status andvalidity of class and statutory certificates, including transfers,changes, suspensions, withdrawals of class, recommendations/conditions of class, operating conditions or restrictions issuedagainst classed ships and other related information, as may berequired, may be published on the website or released by othermeans, without the prior consent of the Interested Party.Information about the status and validity of other certificates andstatements may also be published on the website or released byother means, without the prior consent of the Interested Party.7.2. - Notwithstanding the general duty of confidentiality owed bythe Society to its clients in clause 7.1 above, the Society's clientshereby accept that the Society will participate in the IACS EarlyWarning System which requires Classification Society to provideother involved Classification Societies with relevant technicalinformation on serious hull structural and engineering systems failures,as defined in the IACS Early Warning System (but not includingany drawings relating to the ship which may be the specificproperty of another party), to enable such useful information to beshared and used to facilitate the proper working of the IACS EarlyWarning System. The Society will provide its clients with writtendetails of such information sent to the involved ClassificationSocieties.7.3. - In the event of transfer of class, addition of a second class orwithdrawal from a double/dual class, the Interested Party undertakesto provide or to permit the Society to provide the other ClassificationSociety with all building plans and drawings, certificates,documents and information relevant to the classed unit, includingits history file, as the other Classification Society may require forthe purpose of classification in compliance with the applicablelegislation and relative IACS Procedure. It is the Owner's duty toensure that, whenever required, the consent of the builder isobtained with regard to the provision of plans and drawings to thenew Society, either by way of appropriate stipulation in the buildingcontract or by other agreement.In the event that the ownership of the ship, product or system subjectto certification is transferred to a new subject, the latter shallhave the right to access all pertinent drawings, specifications, documentsor information issued by the Society or which has come tothe knowledge of the Society while carrying out its Services, evenif related to a period prior to transfer of ownership.Pursuant and owing to Italian legislative decree 196/2003, theInterested Party declares that it has read the information sheet concerningthe processing of personal data published on the society'swebsite and gives its consent to such processing, also for commercialinformation purposes.Article 88.1. – Should any part of these General Conditions be declaredinvalid, this will not affect the validity of the remaining provisions.8.2. - In the event of doubts concerning the interpretation of theseGeneral Conditions, the Italian text will prevail.Article 99.1. – When the Society provides its Services to a consumer - i.e. anatural person who does not act within the scope of his businessor professional activity - the following provisions do not apply: art.3.2. (as far as the Society is solely entitled to the interpretation ofthe Rules); art. 4.2., (as far as the payment of the fees is also duefor services not concluded due to causes not attributable to theInterested Party); art. 5.1. (as far as the exclusion of liability is concerned);art. 5.2.; art. 5.3.; and art. 6.1. (as far as the jurisdictionof a Board of Arbitrators based in Genoa is concerned).

RULES FOR THE CLASSIFICATION OFFLOATING DOCKSChapters 1 2 3 4 5 6Chapter 1Chapter 2Chapter 3Chapter 4Chapter 5Chapter 6Application and GeneralClassificationSurvey RequirementsHull, Stability and MaterialsMachinery and SystemsFire Protection

CHAPTER 1 APPLICATION AND GENERAL1 Application 91.1 General2 General 92.1 Statutory regulations2.2 AbbreviationsRules for floating docks 2010 3

CHAPTER 2 CLASSIFICATION1 Premise 101.1 Reference to the Rules2 Class notations 102.1 Service notation2.2 Navigation notations2.3 Annotations in the Certificate of Classification4 Rules for floating docks 2010

CHAPTER 3 SURVEY REQUIREMENTS1 Application and general 111.1 Premise2 Surveys for the assignment of class 112.1 Floating docks surveyed by RINA during construction2.2 Floating docks classified after construction3 Surveys for maintenance of class 113.1 Biennial surveys3.2 Class renewal surveys3.3 Dry-docking survey or equivalent underwater inspectionRules for floating docks 2010 5

CHAPTER 4 HULL, STABILITY AND MATERIALS1 General 131.1 Foreword1.2 Definitions and symbols1.3 Documentation to be submitted1.4 Operating Manual2 General requirements for design 142.1 Stability2.2 Freeboard2.3 Subdivision2.4 Ventilation2.5 Accessibility of spaces2.6 Corrosion protection3 Materials and connections 173.1 Steel docks3.2 Docks in reinforced concrete or in pre-stressed reinforced concrete4 General requirements for scantlings 184.1 General4.2 Allowable state and limit state4.3 Direct calculations4.4 Longitudinal strength4.5 Transverse strength4.6 Local strength6 Rules for floating docks 2010

CHAPTER 5 MACHINERY AND SYSTEMS1 Machinery and piping systems 221.1 General2 Electrical installations 222.1 General3 Documentation to be submitted 223.1 GeneralRules for floating docks 2010 7

CHAPTER 6 FIRE PROTECTION1 Application 231.1 General2 General 232.1 Foreword3 Structural fire protection and means of escape 233.1 Structures3.2 References4 Fire extinction 234.1 Water fire-fighting system (fire main)4.2 Fire-fighting arrangements in spaces containing auxiliary boilers or otherinstallations for liquid fuel4.3 Fire-fighting arrangements in spaces containing internal combustion engines orgas turbines4.4 Fixed pressure water-spraying fire-extinguishing system4.5 Fixed gas fire-extinguishing system for machinery spaces4.6 Fixed foam fire-extinguishing system4.7 Portable fire extinguishers4.8 Portable fire-fighting equipment8 Rules for floating docks 2010

Chapter 1CHAPTER 1APPLICATION AND GENERAL1 Application2 General1.1 General1.1.1 These Rules apply to the floating docks specified inChapter 2.Floating docks other than those described herein will beconsidered on a case-by-case basis.As far as concerns matters not specifically dealt with inthese Rules, reference should be made to the requirementscontained in the "Rules for the Classification of Ships", as faras reasonably applicable.1.1.2 In general, the requirements regarding fire protection,detection and extinction (hereinafter referred to as "fireprotection") are not mandatory for the purpose of classification,except where RINA carries out surveys relevant to fireprotection statutory requirements on behalf of the flagAdministration. In such cases, fire protection statutoryrequirements are considered a matter of class and thereforecompliance with these requirements is also verified byRINA for classification purposes at class surveys.Therefore, the requirements of Chapter 6, relevant to fireprotection, do not apply for the purpose of classification.2.1 Statutory regulations2.1.1 The classification of a floating dock does not absolvethe Interested Party from compliance with any requirementsissued by Administrations and any other applicable internationaland national regulations for the safety of life at seaand protection of the marine environment.2.2 Abbreviations2.2.1 RulesIn these Rules, the wording "Rules" is intended to mean theeffective RINA "Rules for the Classification of Ships"; i.e.,when in the text, reference is made to Part A of the Rules,reference is to be made to Part A of the Rules for the Classificationof Ships. Conversely, the wording "these Rules" isintended to mean these Rules for the classification of floatingdocks.Rules for floating docks 2010 9

Chapter 2CHAPTER 2CLASSIFICATION1 Premise1.1 Reference to the Rules1.1.1 Unless otherwise mentioned below, reference is tobe made to the relevant provisions in Part A of the Rules.2 Class notations2.1 Service notation2.1.1 Floating docks complying with the requirements ofthese Rules are eligible for the assignment of the servicenotation floating dock.. The service notation may be completedby the following additional service features, as applicable,depending on how a particular floating dock is builtand/or whether it is provided with special arrangements andequipment that enable it to perform specific services:a) Lifting dock: when the floating dock is employed for liftingand/or launching floating structures by means ofmobile sliding ways.b) Building dock: when the floating dock is employed forconstruction and repair of particular floating structures.c) Dry dock: when the floating dock is employed for construction,maintenance and repair of ships and otherfloating units.In order to be classified to perform more than one service,floating docks are to comply with the requirements relevantto each service and the operational provisions necessary tochange over from one service to another.2.2 Navigation notations2.2.1 Floating docks are assigned one of the following navigationnotations:a) sheltered area (in the harbour of ……….)b) sheltered area (in harbour waters).2.3 Annotations in the Certificate of Classification2.3.1 Particular systems or arrangements, if any, installedon board may be indicated in the Certificate of Classification.2.3.2 Lifting capacityDesign lifting capacity is the maximum load that has beenassumed for the scantlings and that the floating dock can liftand support in satisfactory condition with respect to theservice and freeboard Bl e , as defined in Chapter 4. Thedesign lifting capacity is recorded in the Certificate of Classificationand the Register of Ships.The capacity of the floating dock actually measured by liftinga load not greater than its design lifting capacity is alsoto be recorded In the Certificate of Classification and theRegister of Ships.2.3.3 Systems or machinery not fitted on boardIf it is technically and operationally allowable, some systemsand/or items of machinery of the floating dock may befitted ashore or on board a supply vessel.In that case an appropriate annotation is to be recorded inthe Certificate of Classification. That annotation will indicatethe systems and machinery not permanently installedon board, but covered by the classification of the floatingdock and therefore subject to examinations and tests atperiodical surveys, and also subject to checks at any otherapplicable class surveys.If the floating dock is provided with a device for the checkof longitudinal deflections, an annotation to that effect is tobe recorded in the Certificate of Classification.10 Rules for floating docks 2010

Chapter 3CHAPTER 3SURVEY REQUIREMENTS1 Application and general1.1 Premise1.1.1 ApplicationAs far as the survey requirements are concerned, thosegiven in this Chapter apply in addition to the relevant provisionsin Part A of the Rules.1.1.2 Expansion of surveysThe surveys provided in this Chapter can be expanded tothe extent deemed necessary and, in the case of particularunits, modified.Any parts found not complying with the applicable requirementsor in an unsatisfactory condition are to be properlymodified or, preferably, replaced, unless otherwise providedby RINA.1.1.3 Fire protectionAs stated under item [1.1.2] of Chapter 1, the requirementsregarding fire protection, detection and extinction (hereinafterreferred to as "fire protection") are not mandatory for thepurpose of classification, except where RINA carries outsurveys relevant to fire protection statutory requirements onbehalf of the flag Administration. In such cases, fire protectionstatutory requirements are considered a matter of classand therefore compliance with these requirements is alsoverified by RINA for classification purposes at class surveys.2 Surveys for the assignment of class2.1 Floating docks surveyed by RINA duringconstruction2.1.1 SurveysFor floating docks surveyed by RINA during construction,class will be assigned according to the provisions of theRules, as far as applicable.2.1.2 Initial testsAt the end of construction, the floating dock will be submittedto the following tests:a) Hydrostatic testsAll the spaces of the floating dock intended to containliquids are to be tested by a water head equal to themaximum design head, according to the provisionsgiven in the Rules, as far as applicable.b) Manoeuvre testsImmersion tests up to the maximum depth and emersiontests are to be performed in all design loading cases.c) Working tests of systems and machinerySystems and machinery are to be submitted to a workingtests in accordance with the provisions given in theRules, as far as applicable.d) Working tests of manoeuvre control systemsThe manoeuvre control systems are to be submitted toworking test and the calibration of the various componentsis to be checked.2.2 Floating docks classified after construction2.2.1 Floating docks classed with an IACS SocietyThe procedure for the assignment of class is in accordancewith the provisions of the Rules, as far as applicable.2.2.2 Floating docks not classed with an IACSSocietyFor existing floating docks that have never been classed byother IACS Societies, the survey for the admission to class isto be a complete survey with additional checks deemednecessary by RINA.3 Surveys for maintenance of class3.1 Biennial surveys3.1.1 PeriodicityBiennial surveys are to be performed every two years runningfrom the beginning of the class period.3.1.2 Survey items to be carried out during biennialsurveysAt biennial surveys the following items are to be examinedand tested, as applicable.a) Pontoon, top and safety decks, wing wall plating abovethe light waterline, keel and side blocks and their foundations.b) Vents and overflow pipes, air pipes extending belowdecks to form air cushions, overboard scuppers, dischargesand intakes, ventilator coamings and closingappliances required as a condition of classification andtheir coamings, where fitted.c) Companionways, ladders and guardrails, and othermeans of protection that may be provided for access toall spaces.d) All items particularly liable to rapid deterioration.e) Deflection control system.At each biennial machinery survey a general examination ofmachinery, boilers, the electrical system, etc. having theRules for floating docks 2010 11

Chapter 3scope of the annual machinery survey as per Part A, Ch 3,Sec 3, [3] of the Rules is to be carried out.For particular arrangements, the survey may be extended asdeemed necessary to the Surveyor's satisfaction.3.2 Class renewal surveys3.2.1 Periodicity, surveys in advance andpostponementsFor all types of floating docks, class renewal surveys are tobe carried out not later than 6 years after the previous one.The first class renewal survey is to be carried out not laterthan 6 years after the date of entry into operation.It is the right of the Interested Party to have a class renewalsurvey carried out in advance or delayed with regard to theregular expiry date. For this purpose, the relevant provisionsgiven in Part A, Ch 2, Sec 2, [4] of the Rules apply.3.2.2 Survey items to be carried out during classrenewal surveyAt class renewal surveys all survey requirements for biennialsurveys are to be complied with. In addition, the followingitems are to be examined and tested, as applicable.a) All means of protection for openings are to be examinedto verify their good condition and readily accessibility.b) Pontoon and wing wall tanks are to be cleaned, examinedinternally, and tested to the satisfaction of the Surveyor.At the discretion of the Surveyor, fuel oil tanksforming part of the main structure need not be examinedinternally until the floating dock is more than 12years old.c) Spaces above the safety deck are to be examined internally,removing linings, etc. where necessary for examination.d) Air pipes extending below deck to form air cushions arealso to be examined.e) Where the surface of plating is covered with cement,composition or wood sheathing, the covering is to beexamined and sounded. If cement or composition isfound to be not adhering to the plating it is to beremoved for examination of the plating. Where woodsheathing has deteriorated or is badly worn, it is to beremoved for examination of the plating.f) f)The means of escape from machinery spaces, crewspaces and spaces in which crew are normallyemployed are to be examined (not applicable for classificationpurposes, see [1.1.3]).g) Where fitted, sounding pipes are to be examined andthe thick steel plate below each sounding pipe for therod to strike upon is to be securely fixed.h) The thickness of any part of the structure where wastageis evident may be required by the Surveyor to be determinedby an approved method. Where necessary, thestructure is to be renewed by material of approvedscantling and specification and the surfaces recoated.At the first class renewal survey after the floating dock is 24years old, and at 12-year intervals thereafter, in addition torequirements a) to h) above, the thicknesses of the structureare to be determined by an approved method to assess thegeneral condition. Two sections of measurements are to bemade within the 0,4Lc mid-length of the floating dock. Inaddition, the Surveyor may require additional measurementsto be taken in those areas where he suspects that corrosionand wastage exceed the acceptable limits. The actualscantlings of the floating dock are to be assessed by the Surveyorand reported.For class renewal survey for machinery, the provisions ofPart A, Ch 3, Sec 5, [3] of the Rules apply. In addition, thecalibration of the components of the system controllingfloating dock manoeuvres is to be performed and thereaftera working test of the system itself is to be carried out.3.3 Dry-docking survey or equivalent underwaterinspection3.3.1 Periodicity and postponements of surveyThe first dry-docking survey is to be carried out not laterthan 6 years after the unit entered operation for both steeland concrete docks.Subsequent dry-docking surveys are to be carried out atintervals not exceeding 6 years; however, this interval maybe extended by not more than 6 years provided that the followingexaminations and checks are satisfactorily carriedout:a) for steel floating docks:1) internal examination of the spaces;2) external examination of the hull below the lightwaterline, after adequate cleaning of the underwaterhull has been performed in such a way as not todamage the protective coating;3) thickness measurements of the main zones of thefloating dock, the extent of which depends on theage of the floating dock.b) for concrete floating docks:1) internal examination of the spaces;2) external examination of the hull below the lightwaterline, after adequate cleaning of the underwaterhull has been performed.The next dry-docking survey is to be carried out not laterthan six years after the previous survey.For floating docks built in concrete, the dry-docking surveyssubsequent to the first one may be carried out at 12-yearintervals.Where it is intended to careen the floating dock, considerationis to be given to its stability and longitudinal strength.Where applicable, such information is to be included in theoperating manual.12 Rules for floating docks 2010

Chapter 4CHAPTER 4HULL, STABILITY AND MATERIALS1 General1.1 Foreword1.1.1 These requirements apply, if not otherwise specified,to docks intended to operate in sheltered areas.Docks for which service in non-sheltered areas is anticipatedwill be subject to special consideration.With respect to structural conformation, floating docks may,in general, be subdivided into the following types:a) Continuous pontoon and walls dock.b) Continuous walls and non-continuous pontoon dock.c) Continuous pontoon and non-continuous walls or towersdock.d) Non-continuous pontoon and walls dock.The above docks may or may not be self-docking.In any case, RINA reserves the right to decide on the applicabilityof these requirements with respect to the particularstructural conformations and service characteristics of thedock.1.2 Definitions and symbols1.2.1 PontoonThe pontoon is the structure extending below and betweenthe wing walls and forming the lower part of the dock.1.2.2 Buoyancy tanksThe buoyancy tanks are watertight compartments, constructedto be empty at all times and hence not providedwith any flooding system.1.2.3 Block Deck or FloorThe block deck or floor is the deck on which blocks arelocated; in general, it coincides with the upper surface ofthe pontoon.1.2.4 Upper deckThe upper deck is the deck joining the top parts of wings ofeach wall, over all their length.1.2.5 Safety deckThe safety deck is the lowest watertight deck located aboveall the ballast tanks and extending over all the length of thedock.1.2.6 Lengtha) The length L c (in m) is the maximum length between theend bulkheads of the part of the dock contributing tobuoyancyb) The length L ft (in m) is the overall length of the dock,including platforms, if any.1.2.7 Breadtha) The breadth B (in m) is the maximum horizontal distancemeasured between the outer surfaces of the wallsof the part of the dock contributing to buoyancy.b) The breadth B m (in m) is the maximum free distance ofthe pontoon measured in line with the block deck.c) The breadth B u (in m) is the maximum available breadth,measured between the internal surfaces of the walls orbetween possible fixed protrusions.1.2.8 Deptha) The depth D (in m) is the maximum vertical distancefrom the moulded line to the upper deck.b) The depth D p (in m) is the vertical distance measured at0,5 L c on the external wing wall from the moulded lineto the block deck, theoretically extended, if applicable,up to the outer wall.1.2.9 Drafta) The draft l u (in m) is the distance from the top of theblocks to the waterline corresponding to Bli.b) The draft I max (in m) is the distance from the mouldedline to the waterline corresponding to Bli.c) The draft I min (in m) is the draft when the dock is invacant condition.d) The draft I lma (in m) is the maximum working draft.e) The draft I lmi (in m) is the minimum working draft.1.3 Documentation to be submitted1.3.1 For each dock for which supervision during constructionis required, documents and details as per Tab 1 areto be submitted to RINA for approval in three copies.Where considered necessary, RINA may request the submissionof further documents and details.If composite materials are employed, irrespective of thepresence of pre-induced stress conditions on structures(structures in reinforced concrete, pre-compressed reinforcedconcrete, pre-stressed structures, etc.), in addition tothe documents indicated in Tab 1, drawings of frames andpre-stressing systems of the various parts, together with thesupporting calculations, are to be submitted for approval.Rules for floating docks 2010 13

Chapter 4Table 1 : Documentation to be submittedDocumentDocument detailsMidship SectionScantling planWatertight subdivision bulkheads• required class characteristics• openings on decks and shell• corrosion protection• minimum and extreme drafts• loads on decks• block deckopenings, if anyWatertight and wash bulkheads of ballast tanks • location of air vents• tanks intended to be partially filled• procedures for tank filling and level and pressure controlMachinery foundationsmass of machineryDetails of section connections(constructional drawing)Wall shutters and similarGeneral plan of external doors and scuttlesGeneral plan of ventilation and manholesArrangement for handling of loadsStructure of load elevatorsuse of roomsrelevant hull stiffeningSea water intakes and overboard discharges in generalHydrostatic test planPumping diagramsStability calculations1.4 Operating Manual1.4.1 An Operating Manual is to be prepared for eachfloating dock, describing the operating condition.In addition to the characteristic elements of the floatingdock itself, the Manual, to be sent for information to RINA,is to report the basic data assumed for the strength calculations(design lifting capacity, load distribution, etc.) andinformation for verification of stability in the various operativeconditions.2 General requirements for design2.1 Stability2.1.1 GeneralFloating docks having a length equal to or greater than 24 mare to be provided with suitable transverse stability characteristicscomplying with the requirements of this item [2.1].2.1.2 Loading conditionsStability calculations are to analyse the most severe operativeconditions, taking into account the heaviest weightpositions, including hanging loads and the possible effectsof free surfaces of liquids in tanks.In particular, for dry docks, the loading conditions whichconsider water levels lapping the top edge of the block deckand the top part of the blocks themselves are to be considered.Moreover, RINA may, at its discretion, request to carry out astability calculation for the case of an emerged floatingdock with displacement as close as possible to full load displacement,with a flooded compartment, eccentric and atone end of the dock, i.e. selected among those involvingthe most severe conditions from the point of view of stability.2.1.3 Intact stability requirementsIn general, for dry docks the initial metacentric transversalheight GM0 of the system ship plus dry dock, consideringall the corrections for liquid free surface effects, is to be notless than 1,5 m for docks with design lifting capacity up to10000 t.The above-mentioned metacentric height may be linearlyreduced for lifting capacities over 10000 t, up to a minimumof 1,0 m for lifting capacities equal to 50000 t orabove.2.1.4 Severe wind and rolling criterion (weathercriterion)a) AssumptionsThe ability of a floating dock to withstand the combinedeffects of beam wind and rolling is to be demonstrated14 Rules for floating docks 2010

Chapter 4for each standard condition of loading, with reference toFig 1 as follows:• the dock is subjected to a steady wind pressure actingperpendicular to the dock's centreline whichresults in a steady wind heeling lever (l w1 );• from the resultant angle of equilibrium (θ 0 ), the dockis assumed to roll owing to wave action to an angleof roll (θ 1 ) to windward;• the dock is then subjected to a gust wind pressurewhich results in a gust wind heeling lever (l w2 );• free surface effects are to be accounted for in thestandard conditions of loading.Figure 1 : Severe wind and rollingLeverb) CriteriaUnder the assumptions of a) above, the following criteriaare to be complied with:• the area "b" is to be equal to or greater than the area"a",where:a : Area above the GZ curve and below l w2 ,between θ R and the intersection of l w2with the GZ curveb : Area above the heeling lever l w2 andbelow the GZ curve, between the intersectionof l w2 with the GZ curve and θ 2 .• the angle of heel under action of steady wind (θ 0 ) isto be limited to 16° or 80% of the angle of deckedge immersion, whichever is the lesser.c) Heeling leversThe wind heeling levers l w1 and l w2 , in m, referred to inb) above, are constant values at all angles of inclinationand are to be calculated as follows:l w1andl w2 = 1,5 l w1where:P : 504 N/m 2The value of P used for docks positioned inprotected locations may be reduced subjectto the approval of RINAGZθ 2 θ caAngle of heelθ 0θ 1PAZ= --------------------1000g∆blw 1lw 2A : Projected lateral area, in m 2 , of the portionof the dock and deck cargo above the waterline;Z : Vertical distance in m, from the centre of Ato the centre of the underwater lateral areaor approximately to a point at one half thedraught;∆ : Displacement, in t;g : 9,81 m/s 2 .d) angles of heel:For the purpose of calculating the criteria of b) above,the angles in Fig 1 are defined as follows:θ 0 : Angle of heel, in degrees, under action ofsteady windθ 1 : Angle of roll, in degrees, to windward dueto wave action, calculated as follows:θ 2 : Angle of downflooding (θ f ) in degrees, either50° or θ c , whichever is the lesserθ f : Angle of heel in degrees, at which openingsin the hull, superstructures or deckhouseswhich cannot be closed weathertightimmerse. In applying this criterion, smallopenings through which progressive floodingcannot take place need not be consideredas open;θ c : Angle in degrees, of second interceptbetween wind heeling lever l w2 and GZcurvesθ R = θ 0 = θ 1x 1 : Coefficient defined in Tab 2x 2 : Coefficient defined in Tab 3k : Coefficientk = 1,0 for a round-bilged dock having nobilge or bar keelsk = 0,7 for a dock having sharp bilgeFor a dock having no bilge keels, a bar keelor both, k is defined in Tab 4.DG : Distance in m, between the centre of gravityand the waterline (positive if centre of gravityis above the waterline, negative if it isbelow)T 1 : Mean moulded draught in m, of the docks : Factor defined in Tab 5.Note 1: The angle of roll θ 1 for docks with anti-rolling devices is tobe determined without taking into account the operations ofthese devices.Note 2: The angle of roll θ 1 may be obtained, in lieu of the aboveformula, from model tests or full scale measurements.The rolling period T R , in s, is calculated as follows:T Rwhere:2CB= -------------GMθ 1 = 109kX 1 X 2 rsRules for floating docks 2010 15

Chapter 4C = 0,373 + 0,023 B/T 1 - 0,043 I w / 100The symbols in the tables and formula for the rollingperiod are defined as follows:L W : Length, in m, of the dock at the waterlineT 1 : Mean moulded draught in m, of the dockA k : Total overall area, in m 2 , of bilge keels, orarea of the lateral projection of the bar keel,or sum of these areas, or area of the lateralprojection of any hull appendages generatingadded mass during dock rollGM : Metacentric height, in m, corrected for freesurface effect.Table 2 : Values of coefficient X 1B/d X 1≤ 2,4 1,002,5 0,982,6 0,962,7 0,952,8 0,932,9 0,913,0 0,903,1 0,883,2 0,863,4 0,82> 3,5 0,80Note 1:Intermediate values are to be obtained by linear interpolation.Table 3 : Values of coefficient X 2C r X 2≤ 0,45 0,750,50 0,820,55 0,890,60 0,950,65 0,97> 0,70 1,00Note 1:Intermediate values are to be obtained by linear interpolation.Table 4 : Values of coefficient kA K × 100----------------------L × B0,0 1,001,0 0,981,5 0,952,0 0,882,5 0,793,0 0,743,5 0,72> 4,0 0,70Note 1:Intermediate values are to be obtained by linear interpolation.Table 5 : Values of coefficient sT R≤ 6 0,1007 0,0988 0,09312 0,06514 0,05316 0,04418 0,038> 20 0,035Note 1:Intermediate values are to be obtained by linear interpolation.2.1.5 Stability bookletEach floating dock is to be provided with a stability booklet,approved by RINA, which contains sufficient information toenable the Master to operate the dock in compliance withthe applicable requirements of this item [2.1].Where any alterations are made to a dock so as to materiallyaffect the stability information supplied to the Master,amended stability information is to be provided. If necessarythe dock is to be reinclined.Stability data and associated plans are to be drawn up in theofficial language or languages of the issuing country. If thelanguages used are neither English nor French the text is toinclude a translation into one of these languages.The format of the trim and stability booklet and the informationincluded are specified in App 2 of Chapter 3 of Part Bof the Rules, as far as applicable.ks16 Rules for floating docks 2010

Chapter 42.2 Freeboard2.2.1 The shell freeboard Bl i , which is the minimum distance,in millimetres, from the floating dock upper deck tothe waterline with the dock at its extreme draft, is to be, ingeneral, not less than 1000 mm. Particular attention is to bepaid to the value of the freeboard Bl i in the event that shellopenings not provided with watertight closing appliancesare arranged.The pontoon freeboard Bl e , which is the distance, in mm,measured in way of the longitudinal plane of symmetryfrom the block deck to the waterline, when the dock is bearinga load equal to its design capacity, is to be, in general,not less than 300 mm.When the block deck is provided with a camber, the minimumfreeboard Bl e is to be not less than 75 mm at the pontoonside.The floating dock is to be provided with a safety deck sothat, when all the ballast tanks located below the safetydeck are filled, the dock is floating with a draft ensuring aside freeboard Bl i . Alternative solutions to the arrangementof the safety deck, such as the arrangement of air cushionsbelow the upper deck, will be subject to special consideration.2.3 Subdivision2.3.1 GeneralThe dock is to be longitudinally and transversely subdividedinto watertight compartments, in order to make it possibleto safely obtain the ballast distributions required in loadconditions and in the anticipated service conditions.2.3.2 Extension of bulkheadsThe longitudinal and transverse watertight bulkheads are toextend, in height, at least up to the safety deck.2.4 Ventilation2.4.1 Quarters, service and machinery spaces and cofferdamsare generally to be provided with natural or forcedventilation.Associated air intakes and outlets to the open are to bearranged, as far as practicable, at heights not less than thoserequired in Part B of the Rules and are to be provided withcut-draught shutters operable from outside.Particular precautions are to be taken for systems servingspaces likely to be contaminated by toxicants or materialswhich may give rise to explosive mixtures with air.2.5 Accessibility of spaces2.5.1 All spaces and cofferdams are to be accessible forinspection, maintenance and repair.2.6 Corrosion protection2.6.1 All metallic parts are to receive at least two coats ofantirust paint of recognised effectiveness and adhesion.Such coating is not required for internal surfaces of spacesintended to contain liquid fuel or mineral or vegetable oils.The application of paints or other coatings is to be carriedout in accordance with good practice and coating manufacturerprescriptions and taking into due account the compatibilityof the types of coatings used in subsequent layers.3 Materials and connections3.1 Steel docks3.1.1 GeneralSteels used for the construction of docks are to comply withthe requirements indicated in Part D, Ch 2, Sec 1 of theRules, or to have equivalent characteristics, at the discretionof RINA.Connections of the various parts are to be carried out incompliance with the requirements of Part B, Ch 12, Sec 1 ofthe Rules.3.1.2 Grades and types of steelDepending on the types of steel, the grades to be used arein general those given in:• Tab 6 for the shell of the safety deck and the upper platingstrake of wing walls contributing to longitudinalstrength and• Tab 7 for the remaining elements contributing to longitudinalstrength, not included in the above, but of particularlocal importance.For structural elements not included among those consideredin Tab 6 and Tab 7, steel grades A, B or AH are to beused, irrespective of the thickness.Wherever necessary, steels of higher grades than those mentionedabove may be required by RINA.Table 6 : Grades of steel to be used for the shell of the safety deck and the upper plating strake of wing walls contributingto longitudinal strengthThickness s ≤ 20 mm 20 < s ≤ 25 mm 25 < s ≤ 40 mm s > 40 mmNormal strength A and B B D EHigher strength steels AH AH DH EHRules for floating docks 2010 17

Chapter 4Table 7 : Table 7 : Grades of steel to be used for elements contributing to longitudinal strength, not includedamong those considered in Tab 2, but of particular local importanceThickness s ≤ 30 mm 30 < s ≤ 40 mm s > 40 mmNormal strength A and B B EHigher strength steels AH AH DHTable 8Lifting capacity ≤ 40000 t 50000 t 60000 t 70000 t 80000 t 90000 t 100000 tCoefficient C 0,8 0,85 0,89 0,92 0,95 0,97 0,993.2 Docks in reinforced concrete or in prestressedreinforced concrete3.2.1 Docks in reinforced concrete or in pre-stressed reinforcedconcrete are considered by RINA on a case-by-casebasis.4 General requirements for scantlings4.1 General4.1.1 The scantlings of the dock are to be such that theindicative values of the state of the structure obtained byapplying the requirements for the check of the longitudinal,transverse and local strength given in the following itemsare no greater than the values of the allowable state.The scantlings of docks in reinforced concrete or in prestressedreinforced concrete are considered by RINA on acase-by-case basis.States exceeding the allowable state, but not in excess ofthe limit state, may be permitted at RINA's discretion underparticular exceptional circumstances.4.2 Allowable state and limit state4.2.1 Definitionsa) Allowable state: the whole of the allowable stresses andglobal and local deformations.b) Limit state: the whole of the stresses and global andlocal deformations beyond which the structure loses itsfunctional characteristics.c) State of the structure: the whole of the stresses and globaland local deformations of the structure.The allowable state and limit state are defined with referenceto the mechanical characteristics of materials and thestability conditions of elastic equilibrium of the structure.4.2.2 Steel docksa) Allowable stresses:σ id amm = 160/K, in N/mm 2τ am = 90/K, in N/mm 2The values of the coefficient K are those indicated inPart B of the Rules, in respect of the steel grade.b) Limit stresses:σ id lim = 0,9 σ snτ am = 0,52 σ snwhere σ sn is the nominal yielding stress of the material.Stress values less than those indicated in items a) and b)may be assumed, at RINA's discretion, with respect to therequirement of granting adequate safety for possible instabilityphenomena.4.3 Direct calculations4.3.1 When checking the constructional drawings, RINAmay consider material distribution and scantlings other thanthose obtained applying the requirements for the check oflongitudinal, transversal and local strength given in the followingitems, provided that it is demonstrated, by means ofdirect calculations based on theoretical assumptions and/orexperimental results, that the allowable state or, for exceptionalload conditions, the limit state is not exceeded.Direct calculations made in accordance with the mostadvanced techniques are to be carried out wheneverrequested by RINA and in general in the case of unusualstructures or docks of large dimensions or particular characteristics.RINA reserves the right to require structural checks, alsotaking into account particular conditions which may exceptionallyoccur during the dock operation.The direct calculations are to be carried out for the mostsevere anticipated realistic load conditions.In particular, if the hydrostatic loads on the local structuresare determined with respect to the differential heads anticipatedduring operation and it is possible that, due to damage,said heads may be exceeded, the check with the loadcondition due to the extreme hydrostatic head which maybe assumed on the structure is to be carried out.4.4 Longitudinal strength4.4.1 Load conditionThe longitudinal strength is to be verified for dock operativeconditions, with the waterline corresponding to the pontoonfreeboard B le , with a structure with load equal to thedesign lifting capacity of the dock arranged on the floorand, as far as practicable, symmetrically on length.In the absence of more precise data, the conventional distributionof ship loads shown in Fig 2 may be assumed for drydocks.18 Rules for floating docks 2010

Chapter 4abFigure 2parablebe reported in the operating manual, the dock deformationsare compatible with the safety of the lifted structure.4.5 Transverse strengtha = 5,3 P / (CL ) (kNm)cb = 6,3 P / (CL ) (kNm)cCL cL c4.5.1 GeneralThe transverse strength of the dock is to be checked both inthe middle and in the end areas and scantlings are to besuch that, with the dock in the load conditions indicated in[4.4.1], the state of the structure does not exceed the allowablestate.Whenever more exact data are not available and heavierload conditions are not anticipated, the conventional checkcriteria given in the following items may be assumed.L c : length of the dock (see [1.2.6]), in mP : design lifting capacity of the dock (see Ch 2,[2.3.2]), in tC : coefficient given by the ratio between the lengthof the shortest ship intended to be lifted and thelength of the dock, to be assumed not more thanthe values given in Tab 8 as a function of the liftingcapacity.4.5.2 Dry Docksa) Load on floor1) For continuous pontoon dry docks with liftingcapacity P ≤ 40000 t, the load condition indicatedin Fig 3 is to be considered.Figure 34.4.2 Scantlings of the midship sectionThe scantlings of the midship section of the dock are to besuch that, in the presence of the bending moment derivedfrom the load condition described in [4.4.1], the state of thestructure does not exceed the allowable state.Whenever more accurate determinations are lacking, thevalues of bending moment given by the following equationsmay be conventionally assumed:a) sagging bending moment, in kN·m:M sag = (1,25 - 1,10 C) P L cBFF = 11 P / (CL c ) (kNm)b) hogging bending moment, in kN·m:M hag = 5 M inswhere P, L c , C have the meanings given in [4.4.1].Where a non-uniform ballast distribution is foreseen, it is tobe checked that, in the same load condition but with uniformlydistributed ballast, the structure state does notexceed the limit state.2) For continuous pontoon dry docks with liftingcapacity P > 40000 t, the heavier of the load conditionsindicated in Fig 4 and Fig 5 is to be considered.B uFigure 44.4.3 Extension of the end scantlingsThe scantlings of the main section are to be kept over alength equal to at least to 0,4 L c in the middle, and thenmay be gradually reduced in way of the ends.B mFF=8P/(CL ) (kN/m)c4.4.4 Non-continuous pontoon and walls docksFor non-continuous pontoon and walls docks the bendingmoment and shearing stress are to be determined takinginto account the connections between the various elements.The Interested Parties are to supply documentation certifyingthat in the most severe conditions of actual operation, toB3) For non-continuous pontoon dry docks, the loadcondition F indicated in Fig 3 is to be considered forthe whole length of the dock.Rules for floating docks 2010 19

Chapter 4Figure 5Figure 6h 1ihFFF=5P/(CL ) (kN/m) cCB uB uThe symbols in Fig 3, 4 and 5 indicate:i : minimum centre distance between two rowsof side blocks, in mP, L c , C : quantities described in [4.4.1]B, B m , B u : breadths described in [1.2.7]b) Bending moment and shear force1) Transverse sagging bending moment M t ins , perlength unit of the dock, in kN/mM t sag = 1,25 FBwhere F and B are the quantities indicated in a) ofthis item [4.5.2]2) Transverse hogging bending moment, per length unitof the dock, in kN/mM t hag = D v / (L c B)where D v is the light displacement of the dock, intonnes3) Shear forceT = the greater value of shear force per length unit ofthe dock, in kN/m, given by the following two relations:T 1 = (D v · B m ) / 5L c BT 2 = 6 Fwhere D v , B m , B, L c assume the values definedabove.4.5.3 Building docksa) Load on floorBWhenever the load that may be assumed on the transversesections of the dock may be reasonably representedby a concentrated force but it is moreconsistently represented by a continuous distribution,the conventional load assumes the shape illustrated byFig 6.h 1 = 5,4· P/(C² LcB u (kN/m ² )h = 6,4· P/(C² LcB u (kN/m ² )where P, C, L c , B u are the quantities indicated in [4.5.2]and the total value of the dashed area is equal to P/(C L c )in t per length unit of the dock.b) Bending moment and shear force1) Transverse sagging bending moment per length unitof the dock, kNm/mM t sag = (1,25 - C · B u /B) · P / (C L c ) · B2) Transverse hogging bending moment per length unitof the dock, kNm/mM t hag = (D v /L c ) · B3) Shear forceT = the greater value of the shear force per lengthunit of the dock, kN/m, given by the following tworelations:T 1 = (D v · B m ) / (L c B)T 2 = ( 1 - C B u / B) 6P / (C L c )D v , B and B m have the meanings defined above.4.6 Local strength4.6.1 GeneralThe structural scantlings determined applying the requirementsfor the check of the longitudinal and transversestrength are to be verified in order to ensure that the allowablestate is not exceeded due to local loads. The conventionalcalculation heads, to be assumed for the purpose ofthe above-mentioned checks for the various parts of thedock, are given in [4.6.2].As an alternative, the extreme differential heads anticipatedin operation may be considered in order to determine thehydrostatic loads acting on the various parts of the dock; insuch case a detailed description of the methods of operationand the checks foreseen is to be submitted to RINA forexamination.Relevant directions are to be reported in the operating manualof the dock.When the check of the local strength of the structure is carriedout considering the loads due to the extreme differentialloads, it is also to be verified that, in the presence of theheaviest load foreseen in the following items, the state ofstructures is compatible with the limit state. RINA maywaive this requirement, provided that a double check systemis foreseen, to be submitted for prior approval, ensuring20 Rules for floating docks 2010

Chapter 4that in the areas considered the conditions foreseen in thecalculation are never exceeded.4.6.2 Calculation headsThe calculation heads to be used for the structural scantlingsare specified in this item, where pdr indicates the referencepoint, intended as the lowest edge of the plate or thecentre of the area supported by the beam, as applicable.a) Bottom and wing walls1) From outside inward: vertical distance from pdr tothe extreme draft line, in m.2) From inside outward, for ballast tanks and storagetanks, the greater of the following values:• 2/3 of the vertical distance from pdr to the upperedge of the overflow, in m;• vertical distance from pdr to 2,5 m above thehighest point of the tank, in m.3) Minimum value: 2,5 m.b) Ballast tanks and storage tanks1) In the case of gravity filling, the greater of the followingvalues:• vertical distance from pdr to the extreme draftline, in m;• vertical distance from the internal level of ballastor storage tanks to the extreme draft line, in m.2) In the case of filling by means of pumps, the greaterof the following values:• 2/3 of the vertical distance from pdr to the upperedge of the overflow, in m;• vertical distance from pdr to 2,5 m above thehighest point of the tank, in m.3) Minimum value: 2,5 m.c) Safety deck1) The greater of the following hydrostatic heads:• vertical distance from pdr to upper deck, in m;• vertical distance from the internal level of tanksunder the safety deck to the extreme draft line inthe case of gravity filling of tanks, in m.2) Minimum value: 2,5 m.d) Block deck or floorHydrostatic head equal to the vertical distance from pdrto the extreme draft line, in m, to be assumed in anycase not greater than 2,5 m.e) Upper deckConventional hydrostatic head equal to 1,5 m.f) BlocksThe load on blocks is to be assumed equal to the valueforeseen in the particular construction or in the operatingmanual and, in any case, for keel blocks, not lessthan the value, in kN, given by the formula:P B = 12 P/Nwhere:P = dock lifting capacity, in tN = number of keel blocks.Rules for floating docks 2010 21

Chapter 5CHAPTER 5MACHINERY AND SYSTEMS1 Machinery and piping systems1.1 General1.1.1 Machinery and piping systems essential for the dockoperation are to be constructed and installed, as far asapplicable and practicable, in compliance with the requirementsof Part C, Ch 1 of the Rules.Arrangements to discharge ballast water are to be providedin such a way that at least two pumps may be used to draineach tank which may be flooded.2 Electrical installations2.1 General2.1.1 The components of the electrical installation are tobe constructed and installed in compliance with therequirements of Part C, Chapter 2 of the Rules.Parts constructed in compliance with national or internationalregulations for industrial installations will be speciallyconsidered.In this last case particular attention is to be given to theenvironmental conditions anticipated for the dock operations,and to the precautions taken for maintenance.2.1.2 The testing of the electrical installation is to includethe following phases:• inspection and test of components• check of the arrangement of components• final test of the installation.3 Documentation to be submitted3.1 General3.1.1 Documents and details relating to machinery andsystems required in Part C, Chapters 1 and 2, as far as reasonablyapplicable, are to be submitted to RINA forapproval.22 Rules for floating docks 2010

Chapter 6CHAPTER 6FIRE PROTECTION1 Application4 Fire extinction1.1 General1.1.1 As stated under [1.1.2] of Chapter 1, the requirementsof this Chapter 6 are not applicable for the purpose ofclassification, except where RINA carries out plan approvaland surveys relevant to fire protection statutory requirementson behalf of the flag Administration. In such cases,fire protection statutory requirements are considered a matterof class and therefore compliance with these requirementsis also verified by RINA for classification purposes.2 General2.1 Foreword2.1.1 The requirements for fire protection of the floatingdocks defined in this Chapter do not consider the liftedobjects.2.1.2 Equipment listed in [2.2] of Section 1 of RINA Rulesfor fire protection, detection and extinction for the issue andmaintenance of statutory certificates other than SOLAS certificatesis to be type approved by RINA.3 Structural fire protection and meansof escape3.1 Structures3.1.1 Caissons, pontoons, side walls, bulkheads, decksand deckhouses are to be made of one of the materials indicatedin [3] of Chapter 4. However, deckhouses, walls andinternal divisions may also be made of other suitable materialprovided that they are fitted, whenever necessary, withadequate fire insulation so that, in case of fire in suchspaces, the structure is prevented from collapsing. Alternativebut equivalent solutions will be specially considered byRINA.3.2 References3.2.1 The requirements of items [1.1.4] to [1.1.7], [1.3],[2.1.2], [2.1.3] and [2.2] of Section 3 of RINA Rules for fireprotection, detection and extinction for the issue of statutorycertificates other than SOLAS certificates are to beapplied.4.1 Water fire-fighting system (fire main)4.1.1 Generala) All docks are to be provided with fire pumps, piping,hydrants and hoses in compliance with the requirementscontained in this item [4.1].b) Docks with lifting capacity less than 200 t are to be providedwith at least one fixed hand pump.c) Docks with lifting capacity equal to 200 t or above butless than 1000 t are to be provided with at least onepump operated by mechanical energy and one handpump.d) Docks with lifting capacity equal to 1000 t or above butless than 2000 t are to be provided with not less thantwo independent pumps operated by mechanicalenergy, preferably arranged on each side of the dock.e) In addition, for docks with lifting capacity of 2000 t andabove, in case a fire in a compartment might put all thefire pumps out of service simultaneously, an independentemergency pump is to be provided.The capacity of the emergency pump will be determined ona case-by-case basis.The emergency pump is to have independent sea waterintake and connection to the fire main and is to be locatedin a promptly accessible area which is not likely to be cutoff by a fire in the area of the main pumps.A valve suitable for cutting off the connection between themain pumps and the fire main is to be fitted.Such valve is to be located in a promptly accessible positionoutside the main fire pump room.Where fire-fighting installations that may be used promptlyare available ashore, the emergency pump may not berequired.4.1.2 Hydrants, hoses and nozzlesa) One hose every 30 m of length of the dock is to be fittedon board; hoses are to be distributed along the docksides.In any case, not less than 6 hoses are to be fitted onboard docks with capacity equal to 1000 t or above andnot less than 4 hoses on board docks with smallercapacity.The hoses required for machinery and auxiliary boilerrooms are not included in the above-mentioned numbers.b) The number and location of hydrants are to be such thatat least two jets of water not coming from the samehydrant, one of which is from a single length of hoseRules for floating docks 2010 23

Chapter 6only, may reach every part of the dock that is normallyaccessible in every operative condition.In machinery spaces with an aggregate total power outputof not less than 750 kW, two hydrants are to be provided,whilst one hydrant only may be accepted formachinery rooms with smaller power output.4.1.3 Characteristics of pumps, piping, hydrants,and hosesa) Docks with capacity equal to 2000 t or above: the diameterof fire mains, the pressure at hydrants and thecapacity of fire pumps are to be in compliance, respectively,with items [1.4.1] c), [1.4.1] f) and [1.4.2] d) ofSection 3 of RINA Rules for fire protection, detectionand extinction for the issue of statutory certificates otherthan SOLAS certificates.b) Docks with capacity equal to 1000 t or more but lessthan 2000 t: the requirements of a) above generallyapply except that, with two pumps simultaneouslydelivering the required quantity of water through thenozzles, the minimum pressure to be maintained at allhydrants is to be such as to ensure that the above nozzlescan project the required jets of water to a distanceof 12 m.c) Docks with capacity less than 1000 t: where only onefire pump is provided, the minimum pressure specifiedin item b) above is to be maintained with such pumpdelivering the maximum required quantity of water. Fordocks having a capacity less than 200 t, the minimumdistance for the water jet may be 8 m.d) The fire main is to be located outside machinery spacesand is to be constructed with fire- and heat-resistantmaterials.Hydrants are to be located in easily accessible positionsand piping is to be laid in such a way as to prevent itfrom being damaged.Unless a hose and a nozzle are provided for eachhydrant, connections of hoses and nozzles are to becompletely interchangeable.e) The washing line of the deck may be used as the firemain if it complies with the requirements of these Rules.f) Fire hoses are to be of non-perishable material approvedby RINA and are to be sufficient in length to project a jetof water to any of the spaces in which they may berequired to be used. Each hose is to be provided with anozzle and the necessary couplings.Fire hoses are, together with any necessary fittings andtools, to be kept ready for use in conspicuous positionsnear the water service hydrants or connections. Firehoses are to have a length of at least 10 m, but not morethan:1) 15 m in machinery spaces;2) 20 m in other spaces and open decks; and3) 25 m for open decks on docks with a maximumbreadth in excess of 30 m.g) Standard nozzle sizes are to be 12 mm, 16 mm and 19mm or as near thereto as possible. Larger diameter nozzlesmay be permitted at the discretion of RINA. Foraccommodation and service spaces, a nozzle sizegreater than 12 mm need not be used.For machinery spaces and exterior locations, the nozzlesize is to be such as to obtain the maximum dischargepossible from two jets at the pressure mentioned in a)from the smallest pump, provided that a nozzle sizegreater than 19 mm need not be used.Nozzles are to be of an approved dual-purpose type (i.e.spray/jet type) incorporating a shut-off.4.2 Fire-fighting arrangements in spacescontaining auxiliary boilers or otherinstallations for liquid fuel4.2.1 For docks of lifting capacity equal to 1000 t orabove, in spaces where oil fired auxiliary boilers areinstalled, having working pressure over 0,18 N/mm 2 , or inspaces containing fuel oil units, one of the following fixedfire-extinguishing systems is to be provided:a) pressure water-spraying system;b) gas system or equivalent;c) high expansion foam system.Fire-fighting arrangements for docks with lifting capacityless than 1000 t will be specially considered.4.2.2 There are to be at least two portable foam fire extinguishersor equivalent in each firing space in each boilerroom and each space in which a part of the fuel oil installationis situated. In addition, there is to be at least one fireextinguisher for each burner; the total capacity of the additionalextinguishers need not exceed 45 l for any one boilerroom. In the case of domestic boilers of less than 175 kW,RINA may consider relaxation of the requirements of thisitem.In each firing space there is to be a receptacle containingsand, sawdust impregnated with soda, or other approveddry material, in such quantity as may be required by RINA.Alternatively, an approved portable extinguisher may beprovided.4.3 Fire-fighting arrangements in spacescontaining internal combustion enginesor gas turbines4.3.1 In spaces where internal combustion engines or gasturbines with total power output of not less than 750 kWare installed, if the dock lifting capacity is equal to 1000 t orabove, the following equipment is to be provided:a) one of the systems indicated in [4.2.1];b) one foam extinguisher with a capacity of not less than45 litres in each engine room and, in addition, one portablefoam fire extinguisher for each 750 kW or fractionthereof; the total number of said portable extinguishersis not to be less than 2 and need not exceed 6.The arrangements foreseen in b) are sufficient for dockswith lifting capacity less than 1000 t.For docks with lifting capacity less than 200 t, the 45-litreextinguisher is not required.24 Rules for floating docks 2010

Chapter 64.3.2 If the engine and boiler rooms are not entirely separate,or if fuel oil can drain from the boiler room into theengine room bilges, the combined engine and boiler roomsare to be considered as one compartment.4.4 Fixed pressure water-spraying fire-extinguishingsystem4.4.1 The system is to comply with the requirements ofitem [1.9] of Section 3 of RINA Rules for fire protection,detection and extinction for the issue of statutory certificatesother than SOLAS certificates.4.5 Fixed gas fire-extinguishing system formachinery spaces4.5.1 The system is to comply with the requirements ofitem [1.7], Section 3 of RINA Rules for fire protection,detection and extinction for the issue of statutory certificatesother than SOLAS certificates.4.6 Fixed foam fire-extinguishing system4.6.1 The system is to comply with the requirements ofitem [1.8] of Section 3 of RINA Rules for fire protection,detection and extinction for the issue and maintenance ofstatutory certificates other than SOLAS certificates.4.7 Portable fire extinguishers4.7.1 Control stations and accommodation and servicespaces are to be provided with portable fire extinguishersdeemed suitable by RINA.a) A portable foam fire extinguisher or equivalent is to befitted in galleys and spaces containing boilers fordomestic use.b) A portable foam fire-extinguisher or equivalent is to bearranged in paint lockers or other spaces containing easilyflammable products for use on board.c) A CO 2 or dry powder portable fire extinguisher is to bearranged in the proximity of switchboards or other electricalpanels of power equal to 20 kW or above.4.7.2 A suitable number of spare charges is to be providedon board.For fire extinguishers which cannot be recharged on board,additional portable fire extinguishers are to be provided inlieu of spare charges.4.7.3 One of the portable fire extinguishers to be providedin each room is to be arranged near the entrance.4.8 Portable fire-fighting equipment4.8.1 In addition to the requirements of the above items,the equipment reported in Tab 1 is to be provided on board.Relaxation may be allowed by RINA based on case-by-caseconsiderations.Table 1Item G.T. < 500 G.T. > 500Fireman’s outfit (see (1)) 1Rescue axe 2 2Crowbar 1Buckets, with lines 2 4Fire-resistant blanket 1 (for G.T. > 1000)Fireman’s belt, withtoolkit1 (for G.T. > 1000)Electrician’s bag 1 (for G.T. > 1000)Portable electric lamp 1 1Spare bulbs and batteries 1 1(1) A fireman's outfit consists of:• one protective suit, complete with hood and rigidhelmet, boots and gloves• one portable electric safety lamp;• one fireman’s axe;• one breathing apparatus of a type deemed suitableby RINA;• one lifeline having a breaking load not less than 3,5kN.Rules for floating docks 2010 25