rules floating docks - 2009

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Rules and Regulations

for the

Classification and Construction of

Floating Docks

2009

HELLENIC REGISTER OF SHIPPING 23, Akti Miaouli, 185 35 PIRAEUS

Tel: +30 210-4196900 Fax: +30 210-4221913-4

e-mail: [email protected]

mailto:[email protected]�

Contents

Floating Docks

1 HELLENIC REGISTER OF SHIPPING

Contents

CHAPTER 1

GENERAL CONDITIONS

CHAPTER 2

CLASSIFICATION

CHAPTER 3

PERIODICAL SURVEYS

CHAPTER 4

MATERIALS AND WELDINGS

CHAPTER 5

FREEBOARD AND STABILITY

CHAPTER 6

HULL CONSTRUCTION

CHAPTER 7

MACHINERY AND ELECTRICAL INSTALLATIONS

CHAPTER 8

FIRE PROTECTION DETECTION AND EXTINCTION

General Conditions

Chapter 1


Contents

SECTION 1 Scope of Classification SECTION 2 Interpretation SECTION 3 Liability SECTION 4 Application for intervention SECTION 5 Technical disagreement SECTION 6 Fees

SECTION 7 Jurisdiction

General Conditions

Chapter 1


SSEECCTTIIOONN 11 SSccooppee ooff CCllaassssiiffiiccaattiioonn 1.1 Hellenic Register of Shipping 1.1.1 Hellenic Register of Shipping hereinafter referred to also as H.R.S. or as “the Society”, is a society, the activity of whose Marine Division includes the classification of vessels, crafts and floating units. 1.2 Expression of confidence 1.2.1 Classification of a vessel, craft or floating unit by the H.R.S. is the expression of confidence extended by H.R.S. to this vessel, craft or floating unit for a specific service within a certain period of time and with reference to H.R.S. Rules and Regulations. 1.3 Limitation of confidence 1.3.1 The expression of confidence extended by the Society reflects the views of the Society only. 1.4 Expression of opinion 1.4.1 The view of the Society is represented by the issuance of Documents in accordance with the Rules and Regulations of the Society. These Documents reflect the Society’s opinion on the condition of the vessel, craft or floating unit at the time of issuance. It is the responsibility of the Owners, or of their representatives, to maintain that condition until the next survey required by the Rules and Regulations. 1.5 Documents 1.5.1 The Society develops Rules and other Documents, publishes Registers and issues Certificates, Attestations and Reports which are the confirmation of its interventions. 1.6 Delegation by Governments 1.6.1 Upon delegation by Governments, H.R.S. may participate in the application, development and interpretation of National or International Regulations or Standards. SSEECCTTIIOONN 22 IInntteerrpprreettaattiioonn 2.1 Exclusivity 2.1.1 The interpretation of all the Documents mentioned in 1.5.1 remains the exclusive prerogative of the Hellenic Register of Shipping. Any reference to the application of these Documents is permissible only with the consent of H.R.S..

General Conditions

Chapter 1

HELLENIC REGISTER OF SHIPPING 4

2.2 Interpretation by another party 2.2.1 Application of the Rules developed by H.R.S. does not infringe possible rights for protection of their products on the part of the manufacturers. SSEECCTTIIOONN 33 LLiiaabbiilliittyy 3.1 General 3.1.1 In providing services, information or advice neither Hellenic Register of Shipping (hereinafter referred to as H.R.S.) nor any of its officers, employees or agents warrants the accuracy of any information or advice supplied. Except as set out herein, neither H.R.S. nor any of its officers, employees or agents (on behalf of each of whom H.R.S. has agreed this clause) shall be liable for any loss, damage or expense whatever sustained by any person due to any act, omission or error of whatsoever nature and howsoever caused of H.R.S., its officers, employees or agents or due to any inaccuracy of whatsoever nature and howsoever caused in any information or advice given in any way whatsoever by or on behalf of H.R.S., even if held to amount to a breach of warranty. Nevertheless, if any person, who is party to the agreement pursuant to which H.R.S. provides any service, uses H.R.S.'s services or relies on any information or advice given by or on behalf of H.R.S. and suffers loss, damage or expense thereby which is proved to have been due to any negligent act, omission or error of H.R.S., its officers, employees or agents or any negligent inaccuracy in information or advice given by or on behalf of H.R.S., then H.R.S. will pay compensation to such person for his proved loss up to but not exceeding the amount of the fee (if any) charged by H.R.S. for that particular service, information or advice. 3.1.2 H.R.S., its officers, employees or agents (on behalf of each of whom this notice is given) shall be under no liability or responsibility in negligence or otherwise howsoever to any person who is not a party to the agreement with H.R.S. pursuant to which any certificate, statement, data or report is issued in respect of any information or advice expressly or impliedly given by H.R.S. or in respect of any omission or inaccuracy therein or in respect of any act or omission which has been caused or contributed to any certificate, statement, data or report being issued with the information and advice it contains (if any). SSEECCTTIIOONN 44 AApppplliiccaattiioonn ffoorr iinntteerrvveennttiioonn 4.1 Application 4.1.1 Applications for Society’s interventions shall be submitted in writing.

General Conditions

Chapter 1


4.2 Acceptance by the applicant 4.2.1 Applications for interventions presuppose acceptance without reservation of the present general conditions. SSEECCTTIIOONN 55 TTeecchhnniiccaall ddiissaaggrreeeemmeenntt 5.1 Designation of another Surveyor 5.1.1 Should a technical disagreement arise between the requesting party and an H.R.S. Surveyor, the Society may, at the request of that party, designate another of its Surveyors. SSEECCTTIIOONN 66 FFeeeess 6.1 Analysis of the fees 6.1.1 For services rendered by H.R.S., fees are to be paid in accordance with the scales of H.R.S.. In addition to these fees, H.R.S. will charge for any extra expenses incurred in connection with the services rendered. 6.2 Settlement of the fees 6.2.1 All fees for all services rendered by H.R.S. are due for payment immediately upon receipt of the invoice. Interest may be demanded in case of late payment. SSEECCTTIIOONN 77 JJuurriissddiiccttiioonn 7.1 Governing law 7.1.1 The governing law is the Greek law. 7.2 Disputes 7.2.1 Any dispute shall be submitted to the court of Piraeus or, at the option of H.R.S., to the court competent for the third party’s place of residence

Classification

Chapter 2


Contents

SECTION 1 Principles of Class assignment SECTION 2 Register of Floating Docks and Classification

Certificates SECTION 3 Conditions for Classification SECTION 4 Procedure for Classification of floating docks built or

converted under H.R.S. supervision and in accordance with H.R.S. Rules

SECTION 5 Procedure for Classification of floating docks not built

or converted under H.R.S. supervision and not in accordance with H.R.S. Rules

SECTION 6 Classification characters and notations

SECTION 7 Classification Regulations

Classification

Chapter 2


SSEECCTTIIOONN 11 PPrriinncciipplleess ooff CCllaassss aassssiiggnnmmeenntt 1.1 The Rules 1.1.1 The present Rules and Regulations for the Construction and Classification of Floating Docks hereinafter referred to as the Rules, are the basis for the Classification of the afore mentioned floating docks by H.R.S.. 1.2 Other Documents 1.2.1 Special Rules, Procedures, Notes, Guidelines and other Documents developed by H.R.S. should be strictly observed and applied for the purposes of Classification. 1.3 Equivalent standards 1.3.1 The Society is entitled to use for Classification purposes any requirements other than those dictated by the Rules, provided the former lead to equivalent standards of strength, safety and stability. 1.4 The Class 1.4.1 Classification characters and notations are assigned following the satisfactory completion of surveys carried out by the Society’s Surveyors and the completion of verification of compliance with the Rules. 1.4.2 Classification characters and notations assigned by the Society, hereinafter referred to also as the Class, indicate the degree of confidence that the floating dock’s hull and machinery deserves for her specific service. 1.4.3 It is the responsibility of the Owner to ensure that any defect, breakdown or damage which could invalidate the floating dock’s assigned Class is to be reported to the Society without delay. 1.5 Survey reports 1.5.1 Classification characters and notations are assigned or reassigned by the Society after consideration of the surveys reports issued by the Surveyors to H.R.S. upon satisfactory completion of surveys. 1.6 Rules changes 1.6.1 Whenever necessary H.R.S. may modify the present Rules. Rules changes become applicable to floating docks the contract of which is signed three months after their publication, unless H.R.S. decides upon an earlier implementation date or it is requested by the party applying for Classification.

Classification

Chapter 2


1.6.2 The implementation of all changes in the Rules, except those concerning the surveys, to already classed floating dock’s is not required unless deemed necessary by the Society or is requested by the party applying for Classification. SSEECCTTIIOONN 22 RReeggiisstteerr ooff FFllooaattiinngg DDoocckkss aanndd CCllaassssiiffiiccaattiioonn CCeerrttiiffiiccaatteess 2.1 Periodicity of publication 2.1.1 The Society undertakes to list the classed Floating Docks in the Register of Ships, which is published annually. 2.2 Certificates 2.2.1 Classification Certificates are issued by H.R.S. to the classed floating dock. They are to be kept on board the dock and are made available on request to the Society’s Surveyor. 2.3 Validity of Class 2.3.1 The validity of the assigned Class and of the Classification Certificates depends on compliance with the requirements of Chapter 3. 2.4 Existing floating docks 2.4.1 For floating dock classed by H.R.S. before the entry into force of the present Rules, the Classification characters and notations assigned at the time of their Classification, will be considered as valid until the expiry of their Classification Certificates. SSEECCTTIIOONN 33 CCoonnddiittiioonnss ffoorr CCllaassssiiffiiccaattiioonn 3.1 Operating conditions 3.1.1 The requirements set forth in the present Rules apply to floating docks operated by competent crew in accordance with the environmental, loading and operating conditions upon which Class assignment is based. 3.1.2 Any change of the conditions for which a Class has been assigned is to be reported to the Society without delay. 3.1.3 These Rules are based on the hypothesis that the floating docks are properly loaded and handled and they don't provide for special loading conditions and/or concentrations of loading. In such cases particulars are to be submitted for consideration and the Society reserves the right to require additional strengthening.

Classification

Chapter 2


3.2 Exceptions 3.2.1 The Floating Dock securing arrangements and mooring attachments are not considered to be classification items. As an additional service and after the Owner’s request, the Society has the ability to proceed to their inspection and certification according to applicable requirements for the specific devices. However, the local strength of the dock structure in way of the securing and mooring attachments are to be considered as classification items. 3.3 Governmental Regulations 3.3.1 Governmental Regulations are to be brought to the attention of the Society by the applicant for Classification. These are to take precedence over the present Rules. In case of conflict H.R.S. reserves the right to call for the necessary adaptations or to refuse or withdraw the Classification. 3.4 Failure to comply with the Rules 3.4.1 The Society reserves the right to refuse or to withdraw the Class of any floating dock for which any requirement applicable under the present Rules is not complied with. SSEECCTTIIOONN 44 PPrroocceedduurree ffoorr CCllaassssiiffiiccaattiioonn ooff ffllooaattiinngg ddoocckkss bbuuiilltt oorr ccoonnvveerrtteedd uunnddeerr

HH..RR..SS.. ssuuppeerrvviissiioonn aanndd iinn aaccccoorrddaannccee wwiitthh HH..RR..SS.. RRuulleess 4.1 Application by the Owner 4.1.1 The application for Classification is to be submitted to H.R.S. in writing by the Owner or by his appointed representative. In case of change of ownership, the new Owner or his appointed representative must immediately inform H.R.S. accordingly declaring also in writing his willingness to maintain the floating dock in Class. 4.2 Submission of plans 4.2.1 Plans and documentation relevant to the Class applied for are to be submitted in triplicate by the applicant for examination and approval by the Society. The Society may also request additional information according to the specific nature of the ship to be classed. 4.3 Approval of plans 4.3.1 Copies of the submitted plans and documentation will be returned duly stamped with notifications for alterations, amendments or additions as deemed necessary to meet Rules requirements. 4.4 Deviation from the approved plans 4.4.1 Any deviations from the approved plans and documents are subject to the approval of H.R.S. before work is commenced.

Classification

Chapter 2


4.5 Materials and equipment 4.5.1 The Society will survey at the manufacturer’s work the materials and equipment used in the construction of the ship and for which the present Rules apply. 4.6 Supervision of construction 4.6.1 The Society will also supervise the assembly of the floating dock, the installation of the machinery and the electrical plant and will check conformity with the approved plans and with the Rules. 4.7 Tests and trials 4.7.1 The Society will monitor tests and trials required by the Rules. 4.8 Machinery and equipment 4.8.1 In general, the machinery, boilers, auxiliary installations and equipment intended for floating docks built or converted under the survey of and in accordance with the present Rules are also to be built under Special Survey. This also applies to engines or equipment produced in series. 4.9 Date of Class assignment 4.9.1 Upon satisfactory completion of the surveys, tests and trials, the attending Surveyor prepares his report for the Society. On the basis of this report H.R.S. issues the Classification Certificates. The Class assigned to the floating dock will be considered granted as of the date of the last survey made during the construction or trials of the floating dock and will be entered in the Register of Ships. 4.10 Access of the Surveyor 4.10.1 The applicant should provide all necessary means to ensure free access of the Surveyor to the floating dock and the workshops where parts requiring approval are manufactured and assembled. SSEECCTTIIOONN 55 PPrroocceedduurree ffoorr CCllaassssiiffiiccaattiioonn ooff ffllooaattiinngg ddoocckkss nnoott bbuuiilltt oorr ccoonnvveerrtteedd

uunnddeerr HH..RR..SS.. ssuuppeerrvviissiioonn aanndd nnoott iinn aaccccoorrddaannccee wwiitthh HH..RR..SS.. RRuulleess 5.1 Application by the Owner 5.1.1 The application for Classification is to be submitted to H.R.S. in writing by the Owner or by his appointed representative. 5.2 Submission of plans 5.2.1 The Society will determine a programme of surveys, appropriate to the age and condition of the floating dock and will decide on plans and documents considered necessary for Classification.

Classification

Chapter 2


5.3 Program of surveys 5.3.1 Upon satisfactory review of the plans and documents and upon satisfactory completion of the programme of surveys determined by the Society, the Class of H.R.S. will be granted as of the date of completion of the surveys. 5.4 Class of another recognised Classification Society 5.4.1 If the floating dock bears the Class of another recognised Classification Society, H.R.S. may dispense with certain inspections pending the next due date assigned by the previous Class. SSEECCTTIIOONN 66 CCllaassssiiffiiccaattiioonn cchhaarraacctteerrss aanndd nnoottaattiioonnss 6.1 Class notations 6.1.1 Classification symbols comprise the construction mark, the Society’s mark H, the division number, the rating letter and port of service. This information is grouped together on the Certificate and in the Register before any other mark or notation. 6.1.2 The construction mark is assigned to floating dock built in compliance with the requirements of SECTION 4. 6.1.3 The construction mark is assigned to floating dock built under the survey of other authorities and which have been assigned by such authorities a Class deemed equivalent to a Class described in the Rules. The mark, may also be assigned to floating dock which are built under the survey of the Society but do not meet certain provisions of the Rules to qualify for the mark. 6.1.4 None construction mark is assigned to floating dock built in accordance with the requirements of Section 5 or classed after construction which do not qualify for the mark . 6.1.5 One of the afore mentioned construction marks is also assigned followed by the symbol of the corresponding additional Class notation, to classed automated installations, refrigerating plants, lifting appliances, and generally to any installation for which a certificate is issued. 6.1.6 The division number is indicated by the numbers 100 or 90. Division 100 floating docks are to meet the Rules requirements for construction and scantlings of the hull and essential components safety as applicable for the intended service. In the event that some requirements are not met although it is deemed possible to enter the floating dock in the Register, the dock is classed in division 90.

Classification

Chapter 2


6.1.7 The rating letter is placed after the division number and denotes the degree of confidence the floating dock deserves. Rating letter A is assigned to floating docks the condition of which is considered satisfactory by the Society. Rating letter B is assigned to floating docks complying generally with the Rules requirements, but for which, due to their condition and/or their age, it has been considered necessary to define periodicity of various surveys shorter than those normally granted to floating docks being assigned the rating A. 6.1.8 The floating dock’s port of operation will be specified by adding “For service at …” to the class notation. 6.1.9 When the floating dock is constructed or repaired at a port which is remote from the port at which the floating dock is intended to operate, the class will not be assigned until the Society has carried out a general examination of the dock following its arrival and installation at the port of operation and ascertain that the dock is in efficient condition. 6.1.10 When the Owner is intended to tow a Floating Dock at the sea, a thorough consideration of the strength, freeboard and stability, and any other item considered necessary, by the Society, may be required. SSEECCTTIIOONN 77 CCllaassssiiffiiccaattiioonn RReegguullaattiioonnss 7.1 New buildings 7.1.1 All the required plans and documents, as detailed in Chapter 6, Section 2.1.1, for floating docks intended to be classed with H.R.S. are to be submitted for approval before the commencement of works. Any subsequent modification or additions to scantlings, arrangements or equipment shown on the approved plans are also to be submitted for approval. 7.1.2 New floating docks intended for Classification are to be built under H.R.S. Special Survey. Construction and qualifying works from the commencement of the work until the completion of the floating dock have to be supervised by H.R.S. Surveyors who are to be satisfied that the materials, workmanship and arrangements are in accordance with the Rules. Any items found not to be in accordance with the Rules or the approved plans or any material, workmanship or arrangement found to be unsatisfactory, are to be rectified. 7.1.3 In compliance with 7.1.2, H.R.S. is prepared to consider special methods of survey and inspection for hull construction based on shipyards' quality management system provided that it meets at least ISO 9001 relevant requirements. 7.1.4 When the machinery is constructed under H.R.S. Special Survey this survey is to relate to the period from the commencement of the work until final tests under normal operating conditions. Any items found not to be in accordance with the Rules or the approved plans, or any materials workmanship or arrangements found to be unsatisfactory are to be rectified.

Classification

Chapter 2


7.2 Existing floating docks 7.2.1 Floating docks which have not been built under H.R.S. Special Survey but under Special Survey of another recognised Classification Society may be classed with H.R.S. following satisfactory completion of a Special Survey for Classification in accordance with the requirements of H.R.S. Rules and after approval by the Society. 7.2.2 When reclassification is desired for a floating dock for which the Class has been withdrawn or suspended, the Society will request that a survey appropriate to the age of the ship and the circumstances of the case be carried out by H.R.S. Surveyors. On satisfactory completion of such a survey in accordance with the Rules the Society will be prepared to reinstate her Class. 7.3 Repairs and alterations 7.3.1 Repairs to hull and machinery which may be required in order that the floating dock maintain her Class are to be carried out to H.R.S. Surveyor’s satisfaction. Concerning repairs effected at a port or location where a H.R.S. Surveyor is not available these repairs must be surveyed by a H.R.S. Surveyor at the earliest opportunity thereafter. 7.3.2 The recommendations for repairs resulting from damage or wear and tear revealed after survey are to be notified to the Owner or his representative. When such recommendations are not complied with immediate notification should be given to the Society by the Surveyors. 7.3.3 If a floating dock classed with H.R.S. is taken in tow outside of port limits, the Owner is to advise H.R.S. of the circumstances at the first practicable opportunity. 7.3.4 Any alteration to approved scantlings and arrangements of hull, machinery or equipment are to be submitted for approval and modification are to be undertaken to the Surveyors satisfaction. 7.4 Existing floating docks - Periodical Surveys 7.4.1 Annual Surveys are to be held on all floating docks within three months before or after each anniversary of the completion, commissioning or Special Survey in accordance with the requirements of Chapter 3. 7.4.2 Underwater Surveys are to be held on all floating docks simultaneously with second or third Annual Survey after completion, commissioning or Special Survey in accordance with the requirements given in Chapter 3. 7.4.3 All floating docks are to be subjected to Special Surveys in accordance with the requirements given in Chapter 3 at five year intervals. The first Special Survey becomes due five years from the date of build or date of Special Survey for Classification. At the discretion of the Society consideration can be given to any exceptional circumstances justifying an extension of the hull Classification to a maximum of three months beyond the fifth year. If an extension is agreed the next period of hull Classification will start from the due date of the Special Survey before the extension was granted.

Classification

Chapter 2


7.4.4 Complete surveys of machinery become due at five years intervals the first one five years from the date of build or date of first Classification. Consideration can be given by the Society to any exceptional circumstances justifying an extension of machinery Class to a maximum of three months beyond the fifth year. If an extension is granted to the subsequent period of machinery, Class will start from the due date of complete Special Survey of machinery before the extension was granted. Where the complete survey is completed more than three months before the due date, the new date recorded will be the final date of survey. In all other cases the date recorded will be the fifth anniversary. 7.4.5 On completion of the Special Survey and after submission of the required reports by the Surveyors and approval by the Society, certificates of first entry of Classification signed by the General Technical Director will be issued. At the Owner’s request certificates of Class maintenance, following completion of Periodical Surveys of hull and machinery, will also be issued. 7.4.6 Provisional (Interim) certificates are permitted to be issued by the Surveyors so enabling the floating dock to proceed in the port of operation upon satisfactory completion of relevant surveys. Such certificates will embody the Surveyors’ recommendations but in all cases are subject to confirmation by the Society. 7.5 Notice of surveys 7.5.1 Owners will be notified by H.R.S. about forthcoming surveys by means of a letter or a quarterly computer printout. The omission of such notice, however, does not absolve the Owner from his responsibility to comply with H.R.S. survey requirements for maintenance of Class. 7.6 Suspension of Class 7.6.1 Where requested by the Owners the Class of any ship will be withdrawn. The Society reserves the right to suspend or withdraw the Class of any floating dock when: (1) The floating dock is not subjected to surveys proving the compliance with the Rules at their

due date. (2) The floating dock has not been rectified in accordance with the Surveyors’ recommendations. (3) Repairs, conversions or alterations, which may affect Classification, have been done without

the approval of the Society. (4) Fees, which are due on account of Classification and other surveys, are not paid. 7.7 Appeal from Surveyors’ recommendations In case the recommendations of H.R.S. Surveyors are considered to be unnecessary or unreasonable appeal may be made to the Society.

Periodical Surveys

Chapter 3


Contents

SECTION 1 General SECTION 2 Survey requirements SECTION 3 Special Survey for floating docks not more than

twenty five years old SECTION 4 Special Survey for floating docks twenty five

years old and every Special Survey thereafter - Hull requirements

SECTION 5 Machinery Surveys SECTION 6 Electrical equipment SECTION 7 Boilers

SECTION 8 Steam pipes

Periodical Surveys

Chapter 3


SSEECCTTIIOONN 11 GGeenneerraall 1.1 Frequency of surveys 1.1.1 All floating docks classed with H.R.S. are to be subjected to the following periodical surveys: ~ Annual Surveys of hull and machinery. ~ Underwater Surveys. ~ Special Surveys of hull and machinery. ~ Boiler Surveys. 1.1.2 Annual Surveys are to be held within three months before or after each anniversary of the Special Survey. 1.1.3 Underwater Surveys are to be held in addition to the second or third Annual Survey and during the Special Survey. 1.1.4 Special Surveys of hull and machinery are to be held at five-year intervals. 1.1.5 Boiler Surveys are to be held internally at intervals not exceeding 36 months and twice in five-year period and generally examined externally at the time of the Annual Survey of the floating dock. 1.2 Survey carried out by the National Authority 1.2.1 Surveys carried out by the National Authority of the country in which the floating dock is registered may be accepted as meeting the requirements of this Chapter at the discretion of the Society. 1.3 Unscheduled Surveys 1.3.1 Beyond the system of Periodical Surveys, the Society reserves the right to perform unscheduled surveys of the hull or machinery in order to verify that the Class assigned is being maintained. 1.4 Procedures for thickness measurements 1.4.1 Thickness measurements should normally be carried out under the supervision of the surveyor. However the Surveyor may accept thickness measurements not carried out under his direct supervision provided that: ~ The thickness measurements are carried out by a qualified company certified by the Society or

other recognised organisation. ~ The thickness measurements are carried out within 12 months prior to completion of the

special survey. The Surveyor should recheck the measurements as deemed necessary to ensure acceptable accuracy.

Periodical Surveys

Chapter 3


1.4.2 A thickness measurement report should be prepared and submitted to the Society. The report should give the location of measurements, the thickness measured as well as corresponding original thickness. Further more the report should give the date when the measurements were carried out, type of measuring equipment, names of personnel and their qualifications and be signed by the operator. 1.4.3 The Surveyor should verify and countersign the thickness measurement reports. SSEECCTTIIOONN 22 SSuurrvveeyy rreeqquuiirreemmeennttss 2.1 Annual Surveys of hull and machinery 2.1.1 The Surveyor is to satisfy himself as to the efficient condition of the following: ~ Steel structures above light waterline, keel blocks and their foundations, platforms at dock

ends, swing bridges. ~ Hatchways, ventilator coamings and air pipes, exposed casings, fiddley openings, skylights,

flush decks, scuttles, manholes, deckhouses and companionways, doors, sidescuttles and deadlights, chutes and other openings, together with all their closing appliances and flame screens.

~ Scuppers and sanitary discharges (so far as is practicable); valves on discharge lines (so far as is practicable) and their controls; guard rails, freeing ports, gangways and life-lines.

~ The general condition of the pump rooms, machinery and boiler spaces with particular attention being given to the existence of any fire and explosion hazards. Emergency escape routes from machinery and working spaces and crew’s accommodation are to be checked to ensure that they are free of obstruction.

~ The bilge pumping systems and bilge wells, including operation of extended spindles and level alarms where fitted, satisfactory operation of the bilge pumps is to be proven.

~ Boilers, other pressure vessels including safety devices, foundations, controls and relieving gear.

~ The main auxiliary and emergency electrical machinery, the switchgear and other electrical equipment are to be generally examined under operating conditions so far as is practicable. Earth bonding straps are to be examined where fitted.

~ Monitoring system for deflection and stresses in the floating dock. 2.1.2 The fire protection systems and arrangements are to be examined and are to include: ~ Verification, so far as is practicable, that no significant changes have been made to the

arrangement of structural fire protection. ~ Verification of the operation of manual and/or automatic doors where fitted. ~ Verification that fire control plans are properly posted. ~ Examination, so far as is possible, and testing as feasible, of the fire and/or smoke detection

system(s). ~ Examination of fire main system, and confirmation that each fire pump, including the

emergency fire pump can be operated separately so that the two required powerful jets of water can be produced simultaneously from different hydrants.

Periodical Surveys

Chapter 3


~ Verification that fire hoses, nozzles, applicators and spanners are in good working condition and situated at their respective locations.

~ Examination of fixed fire-fighting systems controls, piping, instructions and marking, checking for evidence of proper maintenance and servicing, including date of last systems tests.

~ Verification that all portable and semi-portable fire extinguishers are in their stowed positions, checking for evidence of proper maintenance and servicing, conducting random checks for evidence of discharged containers.

~ Verification, so far as is practicable, that the remote control for stopping fans and machinery and shutting off fuel supplies in machinery spaces are in good working order.

~ Examination of the closing arrangements of ventilators, funnel annular spaces, skylights, doorways and tunnels where applicable.

~ Verification that the firemens’ outfits are complete and in good condition and properly stored. ~ Surveys carried out by the National Authority of the country in which the floating dock is

registered may be accepted, at the discretion of the Surveyor, as meeting these requirements. 2.2 In-water Surveys 2.2.1 During each In-water Survey the following requirements are to be complied with: ~ The side and bottom plating is to be examined for excessive corrosion, or deterioration due to

chafing or contact with the ground and for any undue unfairness or buckling. Important plate unfairness or other deterioration, which do not necessitate immediate repairs, are to be recorded.

~ Waterline shell openings, including main inlets and discharges and their sealing arrangements, sea chests and their gratings, sea connections and overboards discharge valves and cocks and their fastenings to the hull or sea chests are to be examined.

2.2.2 The In-water Survey is to be carried out with the floating dock at a suitable draught. The in-water visibility is to be good and the hull below waterline is to be clean. The Society is to be satisfied with the methods of localisation of the divers on the plating. 2.2.3 The In-water Survey is to be carried out by: (a) A Surveyor who is a skilled diver and trained to carry out In- water Surveys, or (b) Professional diver(s) under surveillance of a Surveyor. The diver(s) have to be employed by a

firm recognised by the Society. 2.2.4 For the method described above the Surveyor shall be satisfied with the method of pictorial representation, and a good two way communication between the Surveyor and divers is to be provided. 2.2.5 Detailed plans of the hull and hull attachments below the waterline are to be available on board, that is: ~ all shell openings, ~ anodes, including securing arrangements, ~ welded seams and butts, The plans submitted shall include all the necessary instructions to facilitate the divers’ work, especially for the taking of clearance measurements.

Periodical Surveys

Chapter 3


2.2.6 It is advisable that both the Surveyor and the divers be provided with photographs, video tapes - preferably in colour and with the scale specified, ultrasonic gauging of plating etc., of main hull parts and attachments below the waterline. The extension of the underwater examination, which coincides with Special Surveys, is to be more comprehensive than the intermediate corresponding inspections. The rate and the parts of examinations are to be agreed with the Society in such a way that the number, size and location of the inspected areas to be to the Surveyor’s satisfaction. SSEECCTTIIOONN 33 SSppeecciiaall SSuurrvveeyy ffoorr ffllooaattiinngg ddoocckkss nnoott mmoorree tthhaann ttwweennttyy ffiivvee yyeeaarrss oolldd --

HHuullll rreeqquuiirreemmeennttss 3.1 General 3.1.1 All requirements of SECTION 2 are to be complied with. 3.2 Preparation 3.2.1 The steelwork is to be cleaned and the rust removed. 3.2.2 All water ballast tanks in pontoons and sides of the floating dock are to be cleaned as necessary to permit their internal examination, where it is required. 3.2.3 Enclosed spaces, pump room, spaces between the upper and the safety deck, engine, boiler and other spaces, are to be cleared and cleaned as necessary and the bilges and limbers are to be cleaned and prepared for examination. Platform plates in engine and boiler spaces are to be lifted as may be necessary for the examination of the structure below. Where necessary, close and spar ceiling, lining and pipe casings are to be removed for examination of the structure. A sufficient amount of ceiling is to be removed from the bilges and inner bottom to enable the condition of the plating to be ascertained. 3.2.4 If the Surveyor is satisfied, after removal of portions of the ceiling in the holds, that the steelwork is in good condition, free from rust and coated the removal of the whole may be dispensed with. 3.2.5 The inner bottom plating and the bottom plating of bulkheads and tunnel sides to be examined. The Surveyor may waive the removal of heavy reinforced compositions if there is no evidence of leakages, cracking or other faults in the composition. 3.2.6 Portions of the cement chocks on the ship’s sides at bilges and decks are to be removed, as considered necessary by the Surveyor, so that the condition of the shell plating and adjacent steelwork can be ascertained. 3.2.7 Portions of wood sheathing, or other covering, on steel decks are to be removed, as considered necessary by the Surveyor, in order to ascertain the condition of the plating.

Periodical Surveys

Chapter 3


3.3 External examination 3.3.1 The external examination consists of: ~ a general examination of the hull as detailed under 2.1.1 and 2.1.2 for the Annual Survey and

2.2.1 for the In-water survey. ~ in addition, the inspections listed in 3.3.2 3.3.2 Decks are examined, with particular attention being given to the areas where high stress concentrations or increased corrosion are likely to arise, such as corners and other discontinuities. Deck erections such as coamings and deckhouses are examined. Worn out, worm-eaten or rotten parts of wood-sheathed steel decks are to be renewed to the Surveyors discretion in order to ascertain the condition of plating underneath. 3.4 Internal examination 3.4.1 Tanks and enclosed spaces, which are integral with the dock’s structure, are to be examined internally. 3.5 Tank testing 3.5.1 Normally all tanks are to be hydraulically tested to the maximum pressure the tank in question may be subjected to in service. If, after an internal examination some tanks were found to be in good condition, these tanks need not to be hydraulically tested. 3.5.2 Independent tanks in the engine room containing fuel or lubricating oil need not be tested, if after an external examination the Surveyor considers their condition satisfactory. 3.5.3 Integral tanks, which are used exclusively for fresh water, are to be examined internally. 3.6 Thickness measurements 3.6.1 If he deems it necessary, the Surveyor may require thickness measurements of main structural parts, plates and stiffeners, showing signs of wear and tear. Such measurements are usually made in the presence of the Surveyor but he may accept thickness measurements not recorded in his presence subject to random checks being made to compare the results. 3.6.2 The Surveyor may require thickness measurements of the following structural items: ~ Main structural parts, plates and stiffeners, showing signs of wear and tear. ~ Within 0,5 L amidships:

each deck plate two transverse sections selected bottom plates selected wind and water strakes.

~ Outside 0,5 L amidships: selected deck plating selected wind and water strakes

Periodical Surveys

Chapter 3


selected bottom plates. ~ Machinery space. ~ Selected transverse and longitudinal bulkheads ~ Selected internal structure such as floors and longitudinals, transverse frames, web frames,

deck beams, tween-deck girders, etc. All main structural parts, plates and stiffeners, showing serious defects or excessive wear and tear are to be renewed. SSEECCTTIIOONN 44 SSppeecciiaall SSuurrvveeyy ffoorr ffllooaattiinngg ddoocckkss ttwweennttyy ffiivvee yyeeaarrss oolldd aanndd eevveerryy SSppeecciiaall

SSuurrvveeyy tthheerreeaafftteerr -- HHuullll rreeqquuiirreemmeennttss 4.1 General 4.1.1 The requirements of the SECTION 3 are to be complied with. 4.2 Examination and testing 4.2.1 The requirements specified in 3.3, 3.4, 3.5 and 3.6 are to be complied with. 4.2.2 A minimum of two selected integral oil fuel tanks are to be examined internally. The other tanks may be examined externally from all accessible boundaries. 4.2.3 All tanks are to be examined internally. Integral tanks, which are used exclusively for oil fuel, are to be examined internally. 4.3 Thickness measurements 4.3.1 The Surveyor may require thickness measurements of the following structural items: ~ Main structural parts, plates and stiffeners, showing signs of wear and tear. ~ Within 0,5 L amidships:

each deck plate three transverse sections each bottom plate all wind and water strakes.

~ Outside the cargo length area or 0,5 L amidships: each deck plate all wind and water strakes each bottom plate.

~ All transverse and longitudinal bulkheads (plates and stiffeners). ~ Selected internal structure such as floors and longitudinals, transverse frames, web frames,

deck beams, etc. Number of measurements can be increased as the Surveyor finds it necessary.

Periodical Surveys

Chapter 3


4.3.2 All paint and rust are to be entirely removed before the plates are gauged by the Surveyor and the actual thicknesses are to be reported in detail to the Society. Where gauged plates are renewed, the thicknesses of adjacent plates in the same strake are to be reported. 4.3.3 The thickness of bottom plating in way of cement is to be ascertained unless the Surveyor, after making an internal and external examination, is entirely satisfied that this is unnecessary. Selected portions of the cement are to be removed from the bottom and bilge, if required by the Surveyor. 4.3.4 Where the holds are insulated for the purpose of carrying refrigerated cargoes, the limbers and hatches are to be lifted and sufficient additional insulation is to be removed in each of the chambers to enable the Surveyor to satisfy himself of the condition of the steel structure and to enable the thickness of the shell plating to be ascertained as required above. SSEECCTTIIOONN 55 MMaacchhiinneerryy SSuurrvveeyyss 5.1 Annual and Intermediate Surveys 5.1.1 For Annual and Intermediate Surveys see SECTION 2. 5.2 Special Surveys of machinery 5.2.1 When the dock is in in-water inspection all openings to the sea including sanitary and overboard discharges with the valves and cocks and their fastenings in the machinery and pump room spaces are to be examined. 5.2.2 The Surveyor is to satisfy himself concerning the efficient condition of the following: ~ Auxiliary engines, air compressors, oil separators, coolers, filters and all pumps and

components used for essential services. ~ Holding down bolts and chocks of engines and diesel generators. ~ Evaporators and their safety devices. ~ Air receivers, their mountings, valves and safety devices are to be cleaned internally and

thoroughly examined. In case internal examination of air receivers is impracticable they are to be hydraulically tested at 1,5 times the working pressure.

~ The bilge system including valves, cocks, strainers, emergency bilge suction valve, pumps, remote reach rods and level alarms, if fitted, are to be opened up, examined and tested under working conditions.

~ The oil fuel, feed, lubricating oil, ballast systems and blanking arrangements to deep tanks, as well as pressure filters, heaters, coolers and their safety devices used for essential services are to be examined and tested as considered necessary by the Surveyor.

~ Fuel tanks not forming part of the ship’s structure are to be examined externally one at the first survey and internally and externally at each Special Survey thereafter and tested to the pressure specified for new tanks. Mountings, fittings and remote controls are also to be examined.

~ Automatic and remote controls if fitted for essential machinery are to be tested under working conditions.

Periodical Surveys

Chapter 3


SSEECCTTIIOONN 66 EElleeccttrriiccaall eeqquuiippmmeenntt 6.1 Annual Surveys 6.1.1 The requirements of 2.1 are to be complied with as far as applicable. 6.2 Special Survey requirements 6.2.1 The following requirements are to be complied with: ~ The fittings on switchboards, section boards and distribution boards are to be examined.

Overcurrent protective devices and fuses are to be inspected to verify that they provide suitable protection for their respective circuits.

~ The electric cables are to be examined as far as is practicable without undue disturbance of fixtures.

~ All generators are to be run under loaded condition, either separately or in parallel, and the performance of speed governors, generator circuit breakers and their associated relays are to be checked as far as is practicable.

~ The insulation resistance of generators, switchboards, motors, heaters, lighting fittings and cables is to be tested and adjusted as necessary.

~ The emergency source of power and its associated equipment are to be tested to demonstrate that the whole system is in good working order, and if they are automatic, in the automatic mode.

~ All the means of communication between the bridge and the machinery control positions are to be tested to ascertain that they function satisfactorily. Where considered necessary by the Surveyor, emergency stopping means of motors for fuel oil pumps, ventilating fans and similar loads, interlocking devices for safety operation of electrical equipment, and motors and their control gears for essential services are to be tested to ascertain that they are in good working order.

SSEECCTTIIOONN 77 BBooiilleerrss 7.1 Frequency of surveys 7.1.1 All boilers, economisers, steam receivers, steam heated steam generators, thermal oil and hot water units intended for essential services, together with boiler used exclusively for non-essential services having a working pressure exceeding 3,4 bar and a heating surface exceeding 4,65 m² are to be surveyed at intervals not exceeding 2 ½ years and generally examined externally at the time of the Annual Survey of the floating dock. 7.2 Examination and testing 7.2.1 During the surveys described in 7.1 the boilers, superheaters, economisers and air heaters are to be examined internally and externally and where considered necessary, the pressure parts are to be tested by hydraulic pressure and the thickness of plates and tubes and sizes of stays are to be ascertained to determine a safe working pressure. The principal mountings on boilers, superheaters and economisers are to be opened up and examined, and the safety valves are to be set under steam

Periodical Surveys

Chapter 3


to a pressure not greater than the approved design pressures of the respective parts. As a working tolerance, the setting is acceptable provided that the valves lift at not more than 103 % of the approved design pressure. The remaining mountings are to be examined externally and if considered necessary by the Surveyor, are to be opened up for internal examination. Collision chocks, rolling stays and boiler stools are to be examined and maintained in an efficient condition. 7.2.2 In fired boilers employing forced circulation, the pumps used for this service are to be opened and examined at each Boiler Survey. 7.2.3 The fuel oil burning system is to be examined under working conditions and a general examination made of fuel tank valves, pipes, deck control gear and oil discharge pipes between pumps and burners. 7.2.4 During surveys of cylindrical boilers fitted with smoke tube superheaters, the saturated steam pipes are to be examined as detailed in SECTION 8. SSEECCTTIIOONN 88 SStteeaamm ppiippeess 8.1 Frequency of surveys 8.1.1 Saturated steam pipes, and superheated steam pipes where the temperature of the steam at the superheater outlet does not exceed 450°C are to be surveyed ten years from the date of build (or installation) and thereafter at five year intervals. 8.1.2 Superheated steam pipes where the temperature of the steam at the superheater outlet is over 450°C are to be surveyed five years from the date of build (or installation) and thereafter at five-year intervals. 8.1.3 At ten years from the date of build (or installation) and thereafter at five year intervals, all copper or copper alloy steam pipes over 75 mm external diameter supplying steam for essential services at sea, are to be hydraulically tested to twice the working pressure. 8.2 Examination and testing 8.2.1 At each survey a selected number of steam pipes which: (a) are over 75 mm external diameter, (b) supply steam for essential services and (c) have bolted joints, are to be removed for internal examination and are to be hydraulically tested to 1,5 times the working pressure. If these selected pipes are found satisfactory in all respects, the remainder need not be tested. So far as is practicable, the pipes are to be selected for examination and hydraulic test in rotation so that in the course of surveys all sections of the pipeline will be tested. 8.2.2 Where main and/or auxiliary steam pipes of the category described in 8.2.1(a) and 8.2.1(b) have welded joints between the lengths of pipe and/or between pipes and valves, the lagging in way of the welds is to be removed and the welds examined and if considered necessary by the Surveyor,

Periodical Surveys

Chapter 3


crack detected. Pipe ranges having welded joints are to be hydraulically tested to 1,5 times the working pressure. Where lengths having ordinary bolted joints are fitted in such pipe ranges and can be readily disconnected, they are to be removed for internal examination and hydraulically tested to 1,5 times the working pressure. 8.2.3 Where, on cylindrical boilers having smoke tube superheaters, the saturated steam pipes adjoining the saturated steam headers are situated partly in the boiler smoke boxes, all such pipes adjoining and cross-connecting these headers in the smoke boxes are, at the surveys required by 8.1, to be included in the pipes selected for examination and testing, as defined in 8.2.1. Where the saturated steam pipes inside the smoke boxes consist of steel castings of substantial construction, these requirements need only be applied to a sample casting. Where steel castings are not fitted, the Surveyor is to satisfy himself of the condition of the ends of the saturated steam pipes in the smoke boxes at each Boiler Survey and if considered necessary, a sample pipe is to be removed for examination. 8.2.4 During the surveys specified in 8.1.3, any of the copper or copper alloy pipes, such as those having expansion or other bends which may be subject to bending and/or vibration, are to be annealed before being tested. This procedure is to be followed also for the closing lengths adjacent to steam driven machinery. Where it is inconvenient for the Owner to fulfil all the requirements of a steam pipe survey at its due date, the Society will be prepared to consider postponement of the survey, either wholly or in part.

Materials and Welding

Chapter 4


Contents

SECTION 1 General

Materials and Welding

Chapter 4


SSEECCTTIIOONN 11 GGeenneerraall 1.1 General requirements 1.1.1 The materials used for the construction of the floating dock should satisfy the Society’s requirements of Part 2, “Materials and Welding”, of Rules and Regulations for the Classification and Construction of Steel Ships, as far as applicable.

Freeboard and Stability

Chapter 5


Contents

SECTION 1 General SECTION 2 Freeboard

SECTION 3 Stability


Chapter 5


SSEECCTTIIOONN 11 GGeenneerraall 1.1 General 1.1.1 The floating dock should to be designed so as to have enough stability and freeboard and not to trim or heel excessively in normal working conditions. 1.2 Operating Manual 1.2.1 The Operating Manual of the floating dock, which is to be submitted for approval, is to contain the operating conditions mentioned in 2.1.2 in addition with the appropriate information to the Dock Master on how to distribute the water ballast in the tanks in order to ensure adequate stability, proper trim and longitudinal deflection and strength data during service in all operating conditions of the dock, taking into account the free surface correction in the tanks of the dock as well as in the ship to be docked. SSEECCTTIIOONN 22 FFrreeeebbooaarrdd 2.1 Freeboard to the pontoon deck 2.1.1 The freeboard to the pontoon deck at the centerline of the floating dock in a working condition corresponding to the maximum lifting capacity of the dock is not to be less than 300mm at the centerline. In addition, in case that the pontoon deck is lower at the inner side wall than at the center, the freeboard at the inner side wall is not to be less than 75mm. 2.1.2 The freeboards mentioned above assume that the dock cranes are positioned in such a way that they cause no trim to the dock. When the cranes, carrying loads equal to their maximum lifting capacity, transferred at the fore or aft end of the dock the pontoon deck is in no case be submerged. 2.2 Freeboard to the upper deck 2.2.1 The freeboard to the upper deck is not to be less than 1.0m when the floating dock is submerged to its maximum draught. 2.2.2 If the port in which the floating dock is intended to be operate is not protected against waves, increased freeboards may be required. SSEECCTTIIOONN 33 SSttaabbiilliittyy 3.1 Loading conditions 3.1.1 At least the following loading conditions should be considered:


Chapter 5


(a) The floating dock fully submerged to the minimum freeboard to the upper deck. (b) The floating dock with the pontoon deck just submerged, taking also into account the most

unfavorable loads from the typical ship supported by the blocks. In this situation as restoring waterplane for the combined system dock/ship should be considered only the waterplane of the side walls of the dock.

(c) The floating dock at working condition with the most unfavorable typical ship on the blocks. 3.1.2 For the stability calculation the floating dock should be assumed free floating. 3.2 Wind loading 3.2.1 Wind heeling moments corresponding to the loading conditions described in 3.1.1 should be calculated according to this section. The wind forces should be considered as acting at right angle to the floating dock. 3.2.2 The design wind speed Vw may be taken as the 1min mean speed and can be considered as 85% of the basic wind speed (3s gust speed) V. 3.2.3 The wind pressure may be taken as:

3 2wP 0.613 10 V−= ⋅ ⋅

where:

P = the wind pressure, kN/m² Vw = the design wind speed, m/s

3.2.4 The wind heeling moment should be calculated by summing up the contributions from all elements of the floating dock, which are exposed to the wind. The wind heeling moment as a function of the heel angle may be calculated by using the following formula:

0.17i

i i ii

hM cos P A z

10

= ϕ ⋅ ⋅ ⋅ ⋅

∑

where:

M = the wind heeling moment φ = the heel angle Pi = the wind pressure at the i-th element, calculated according to 3.2.3, kN/m² Ai = the area of the i-th element, m² hi = the vertical distance from the center of the area of the i-th element to the waterplane zi = the vertical distance from the center of the area of i-th element to the center of the

lateral resistance of the underwater body of the dock.


Chapter 5


3.3 Intact stability criteria 3.3.1 Compliance with the stability criteria given in 3.3.2 and 3.3.3, should be proved for the loading conditions described in 3.1.1. 3.3.2 In general, the initial metacentric height after the correction for free surface effect, for the combined body of ship and floating dock is not to be less than 1.5m if the lifting capacity of the dock is 10000t. For floating docks with a capacity of 50000t or more, the metacentric height may be reduced to a minimum value of 1.0m. 3.3.3 The point of intersection between the statical stability curve and wind heeling moment curve should not exceed the angle for which any part of the pontoon deck submerges, for the loading condition 3.1.1(c).

Hull Construction

Chapter 6


Contents

SECTION 1 General SECTION 2 Submission of plans and documents SECTION 3 Design Loads SECTION 4 Longitudinal strength SECTION 5 Transverse strength SECTION 6 Local Strength SECTION 7 Corrosion protection and additions

SECTION 8 Tests and Trials

Hull Construction

Chapter 6


SSEECCTTIIOONN 11 GGeenneerraall 1.1 Application 1.1.1 These rules apply to floating docks, intended to operate in a sheltered port, of the following types: (a) Caisson type

: bottom pontoon and both wing walls are continuous and inseparable

(b) Pontoon type

: wing walls are continuous and the bottom is formed of non-continuous pontoons, which may be either permanently or detachably connected to the dock wings.

1.1.2 Structural designs, which are not in direct compliance with the requirements of these Rules, may be accepted by the Society provided that such designs are considered satisfactory and equivalent to the Rules. 1.1.3 The Rules are set forth for steel floating docks of all welded constructions. 1.2 Definitions and Terms 1.2.1 Unless otherwise mentioned, the dimensions of the following paragraph are to be inserted in meters into the formulae stated in the following sections. 1.2.2 Symbols

LD = length of the dock defined as the distance between the aft end of the after most pontoon and the fore end of the forward pontoon, or the length of the bottom caisson.

BD = moulded breadth of the dock DD = depth of the dock, the vertical distance from the lowest point of the bottom to the

uppermost deck plating. 1.2.3 Pontoon deck is the deck of the pontoon structure supporting the keel blocks. 1.2.4 Safety deck is a watertight deck to be located at such a height below the upper deck that when all the tanks below the safety deck are flooded, with no load on the keel blocks, a sufficient freeboard to be provided. 1.2.5 Upper deck is the deck extending over the length of the wing walls to form the top of wing walls.

Hull Construction

Chapter 6


SSEECCTTIIOONN 22 SSuubbmmiissssiioonn ooff ppllaannss aanndd ddooccuummeennttss 2.1 Required plans and documents 2.1.1 Plans and documents in triplicate covering the following items are to be submitted to the Society for approval: ~ General description and specification of the dock ~ General arrangement plan ~ Plan of transverse section at the mid-length of the dock ~ Structural plans of the wing walls and pontoons ~ Structural plans of the decks and bulkheads ~ Plan of deckhouses ~ Specification of closing appliances ~ Calculations and data for longitudinal, transverse and local strength ~ Arrangement of anchorage of the dock ~ Arrangement and appliances for monitoring deflections and stresses ~ Particulars of indicator systems for tank water level and drafts ~ Capacity and sounding data of all tanks including the position of the centre of gravity and free

surface correction ~ Stability calculation and hydrostatic curves ~ Operating manual ~ Plans of pumping arrangements ~ Machinery and electrical plans ~ Piping systems diagrams ~ Plans of fire extinguishing arrangements SSEECCTTIIOONN 33 DDeessiiggnn LLooaaddss 3.1 External pressures 3.1.1 The external pressures which should be considered acting on several parts of the structure for design purposes should not be taken less than the values given in Table 6.1.

Hull Construction

Chapter 6


Table 6.1: Design external pressures

Structural element Design external pressures

(kN/m²)

Structural elements below waterline corresponding to the max. draught

10h0, where h0 is the vertical distance from the point under consideration to the waterline. h0 shall not be taken less than 0.5m

Sides above waterline corresponding to the max. draught

5

Upper deck 5

Platforms 6

Superstructures and bridges 3.5

3.1.2 For the design of the docking blocks and their supporting structure the considered load per unit length should not be less than:

D

Cq 1.4L

= ⋅ ,

where:

q = the design load of the docking blocks and their supporting structure, t/m. C = the lifting capacity of the dock, i.e. the displacement of the heaviest ship the dock is

intended to lift, t. 3.2 Internal pressures 3.2.1 The design pressure in tanks should not be taken less than:

i 120p h3

= ⋅ , or

i 2p (h 2.5) 10= + ⋅ ,

whichever is greater, where:

pi = the internal design pressure, kN/m² h1 = the height from the point under consideration to the top of the air pipe, m. h2 = the height from the point under consideration to the top of the tank, m.

Hull Construction

Chapter 6


3.3 Typical ships 3.3.1 For the evaluation of the longitudinal strength of the floating dock, and if not otherwise specified by the Builders of the dock, the weight distributions given in 3.3.2 and 3.3.3 may be considered as the most unfavorable load cases. In both cases the middle of the ship is supposed to coincide with the middle of the dock. 3.3.2 Typical sagging ship The ship is assumed to have a displacement equal to the lifting capacity of the dock and her length is assumed not to exceed 80% of the length of the dock. The weight distribution should be given by the following parabola:

2S S3

SS

7W(x) 2 x6 LL

∆ ∆= − ⋅ ⋅ + ⋅

where:

W(x)= weight distribution of the docked ship, t/m. x = is the abscissa measured from the center of the docked ship. ΔS = is the displacement of the docked ship (equal to the lifting capacity of the dock), t. LS = 0.8·LD, the considered length of the docked ship, m.

3.3.3 Typical hogging ship The ship is assumed to have a displacement equal to the lifting capacity of the dock and her length is assumed not to be less than 120% of the dock length. The weight distribution should be given by the following formula:

S S

S

S S

S

L7 , x6 L 6

W(x)L2 , x

3 L 6

∆⋅ ≥

= ∆ ⋅ <

where:

W(x)= weight distribution of the docked ship, t/m. x = the abscissa measured from the center of the docked ship. ΔS = the displacement of the docked ship (equal to the lifting capacity of the dock), t. LS = 1.2·LD, the considered length of the docked ship, m.

Hull Construction

Chapter 6


SSEECCTTIIOONN 44 LLoonnggiittuuddiinnaall ssttrreennggtthh 4.1 General 4.1.1 The strength requirements given in the present section are based on the assumption that the stiffness of the ship does not contribute to the stiffness of the dock. 4.1.2 As a general principle, the most unfavorable expected docking and transient conditions should be taken into account for the assessment of the longitudinal strength of the dock. 4.1.3 If the operational area of the dock is not sheltered against waves, proper wave loading should be taken into account. 4.1.4 When no specific data are given by the Builders of the dock, both typical ship weight distributions given in 3.3.2 and 3.3.3 should be considered. 4.1.5 If a reduction to the bending moment is achieved by uneven distribution of ballast water in the bottom tank, the condition with ballast water evenly distributed over the entire length of the dock should also be considered. 4.2 Deck girder bending and shearing strength In general, all members which are continuous or effectively developed within 0,4·LD amidships and generally tapered beyond 0,4·LD may be included in the calculation of the section modulus. The section modulus to the deck or to the keel is obtained by dividing the moment of inertia by the distance from the neutral axis to the moulded deck line at side or to the base line respectively. 4.3 Maximum allowable stresses 4.3.1 The maximum allowable stresses are given in Table 6.2. Table 6.2: Maximum allowable stresses

Load Case Allowable longitudinal

bending stress (N/mm²)

Mean Shear stress (N/mm²)

Typical sagging ship (see 3.3.2)

140/k 100/k

Typical hogging ship (see 3.3.3)

140/k 100/k

Even distribution of ballast in the bottom tanks (see 4.1.5)

200/k 120/k

NOTE: k is a material factor defined as follows:

k = 1, for ordinary structural steel. = 0.78, for steel with minimum upper yield point 315 N/mm². = 0.72, for steel with minimum upper yield point 355 N/mm².

Hull Construction

Chapter 6


SSEECCTTIIOONN 55 TTrraannssvveerrssee ssttrreennggtthh 5.1 General 5.1.1 For the assessment of the transverse strength the most unfavorable expected conditions should be taken into account. 5.1.2 If the operational area of the dock is not sheltered against waves, proper wave loading should be taken into account. 5.2 Loading 5.2.1 When no specific data are given by the Builders of the dock, the loading condition corresponding to the docking of the typical ships, as described in 3.3.2 and 3.3.3 should be considered. 5.2.2 Along with the conditions of 5.2.1, the following transient condition should also be examined: ~ The dock with the most unfavorable typical ship fully supported on the blocks and the

pontoon deck subjected to a water head just below top of the docking blocks. 5.3 Calculation of Section Modulus 5.3.1 The net effective cross sectional area of all effective transverse strength members may be included. 5.4 Maximum allowable stresses 5.4.1 The maximum allowable stresses are given in Table 6.3. Table 6.3: Maximum allowable stresses

Load Case Allowable transverse

Bending stress (N/mm²)

Mean Shear stress (N/mm²)

Typical sagging ship (see 3.3.2)

170/k 100/k

Typical hogging ship (see 3.3.3)

170/k 100/k

Even distribution of ballast in the bottom tanks (see 5.2.2)

160/k 100/k

NOTE: k is a material factor defined as follows:

k = 1, for ordinary structural steel. = 0.78, for steel with minimum upper yield point 315 N/mm². = 0.72, for steel with minimum upper yield point 355 N/mm².

Hull Construction

Chapter 6


SSEECCTTIIOONN 66 LLooccaall SSttrreennggtthh 6.1 Definitions 6.1.1 The following symbols are used in the formulae of this section:

t = thickness of plating, mm s = stiffener spacing, m p = design pressure, according to 3.1.1 and 3.1.2, kN/m² σ = nominal bending stress due to lateral pressure, N/mm² ℓ = stiffener span, m m = bending moment factor

6.2 Strength Evaluation 6.2.1 Plating In general the thickness of all plating subjected to lateral pressure is not to be less than:

kpt 15.811 s t= ⋅ ⋅ +σ

, mm

where

p = the design pressure tk = the additional thickness of the plate for the material loss due to corrosion, according to

Table 6.4, mm The σ-value is normally not to be taken greater than 160/k N/mm², while the von Misses stress of the members is not exceed 235/k N/mm², where k is the material factor as defined in Table 6.4. 6.2.2 Stiffeners The minimum required section modulus of stiffeners, beams, frames and girders subjected to lateral pressure is not to be less than:

21000 p sSMm⋅ ⋅ ⋅

=⋅ σℓ , cm³

where,

m = 12, for longitudinal stiffeners = 10, for transverse stiffeners

The stress σ is not to be greater than 160/k N/mm² and the sum of hull girder, local girder and stiffener bending stress is not exceeding 215/k N/mm².

Hull Construction

Chapter 6


6.2.3 For brackets, stiffeners and plating of different strength groups and structural details, the relevant requirements of ship Rules are to be complied with as far as practicable. 6.3 Pontoon strength 6.3.1 Deviation from these requirements may be accepted after special consideration based on the principle of equivalent overall strength. 6.3.2 For pontoon bottom and wing walls, the design pressure is not to be taken less than the greater of the internal and the external pressure head. 6.3.3 If the pontoon deck is intended for wheel loads, the scantlings are to be calculated in accordance with Part 4, Chapter 6, Section 4 of the ship Rules. 6.4 Docks of the Caisson Type 6.4.1 The plate thickness is to be taken as

Dt s k L= ⋅ ⋅ , mm, or,

according to 6.2.1,

whichever is greater. σ-value is to be taken as defined in 6.2.1 except for longitudinal stiffened bottom plating within 0.4·L, which is not to be greater than 120/k N/mm². 6.5 Docks of the Pontoon Type 6.5.1 The plate thickness is to be taken as

Dt s k L= ⋅ ⋅ , mm, or,

according to 6.2.1, when σ = 160/k N/mm²,

whichever is greater. 6.6 Upper deck 6.6.1 The thickness of the upper deck plating is to be as required for the longitudinal strength of the deck. 6.6.2 The plate thickness is not to be less than

t 7.5 (s 0.6) 7.5= + − ⋅ , mm

Hull Construction

Chapter 6


6.6.3 The upper deck is normally to be stiffened longitudinal. The scantling of longitudinals are to be as required for the longitudinal strength of the dock, but in no case to be less than that provided in 6.2.2. SSEECCTTIIOONN 77 CCoorrrroossiioonn pprrootteeccttiioonn aanndd aaddddiittiioonnss 7.1 General 7.1.1 All external and internal steel surfaces except in tanks are to be protected against corrosion by paint of suitable composition or other effective coating. 7.1.2 If an approved protection system is applied, the corrosion additions may be reduced or dispensed with. 7.1.3 The corrosion additions shown in Table 6.4 are to be taken into account. Table 6.4: Corrosion allowance tk, mm

Area Corrosion addition tk, mm

Internal members and plate boundary between spaces of the given category

Between pontoon and safety deck

Elsewhere

Ballast tank / Ballast tank 3.0 1.5

Ballast tank / Hull exterior 2.0 1.0

Ballast tank / Void space 2.0 1.0

Void space / Void space 1.0 0.5

Other spaces 1.0 0.5

Hull Construction

Chapter 6


SSEECCTTIIOONN 88 TTeessttss aanndd TTrriiaallss 8.1 Tests 8.1.1 Hydrostatic tests, air tests and hose tests are to be carried out in accordance with Part 3, Chapter 1, Section 4 of Rules and Regulations for the Classification and Construction of Steel Ships as far as applicable to floating docks. 8.1.2 Material tests are to be carried out in accordance with Part 2 of the Ship Rules. 8.2 Trials 8.2.1 General On the completion of the dock sinkage trials an inclining test should be carried out in the presence of the surveyor. 8.2.2 Sinkage Trials During the sinkage trials of the floating dock fresh water tanks and fuel oil tanks should be full and traveling cranes should be so positioned that the floating dock has no trim. The density of the water is to be recorded. 8.2.3 Normal condition All ballast tanks should be emptied so far as possible. Draughts, fore and aft, port and starboard, should be recorded. The deflection of the dock along the top of keel blocks should be measured. The light displacement of the dock is to be established from the above readings, adding the weight of any compensating ballast water. Calibration of the deflection measurement system should be made if necessary. 8.2.4 Sagging condition The sagging condition should be achieved by filling the water ballast tanks in the midlength on each side of the dock in such quantities, so as to produce an equal sagging moment as the dock is loaded on the keel blocks with the most unfavorable ship which the dock has been designed for. The deflections are measured.

Machinery and Electrical Installations

Chapter 7


Contents

SECTION 1 Machinery installations SECTION 2 Electrical installations

SECTION 3 Indicator systems


Chapter 7


SSEECCTTIIOONN 11 MMaacchhiinneerryy iinnssttaallllaattiioonnss 1.1 General 1.1.1 As far as relevant and applicable the requirements of Part 5 “Machinery” of the Rules and Regulations for the Classification and Construction of steel ships of the Society are to be complied with, for the essential machinery, such as boilers, pressure vessels, compressors, auxiliary engines, generators etc. for the safety and operation of the floating dock. 1.1.2 The piping system and machinery piping systems are, in general, to be in accordance with the relevant provisions of the ship rules as far as practicable. 1.1.3 The floating dock is to have a ballast system such that not less than two pumps of appropriate capacity are to be installed for the ballasting and deballasting of any water ballast tank of the dock. The ballast system should be arranged in such a way that in case of failure to the one pump the other to be capable of deballasting each tank. SSEECCTTIIOONN 22 EElleeccttrriiccaall iinnssttaallllaattiioonnss 2.1 General 2.1.1 Electrical equipment installed in accordance with Part 6 “Electrical Installations” of the ship Rules will be accepted. 2.1.2 In general, electrical equipment is to be constructed in the manner to minimize the risk of electric shocks, cause of fire etc. 2.1.3 Electrical machinery and cables are to be safely and effectively under the conditions of the environment where intended to operate. 2.1.4 Electrical installations of floating docks are to be protected against accidental over-currents including short-circuits. The protective devices are to be capable of breaking the fault circuits and continuously serving other circuits as far as possible and at the same time eliminating the draught of damage to the system and fire hazard. 2.1.5 The application of cables used for electrical equipment in floating docks is to comply with the requirements of Section 1 of the above mentioned rules. Where it is desired to use other cables than those stipulated in this Section, their approval is subject to the consideration of the society. Cables and insulated wires manufactured in accordance with the relevant recommendations of IEC Publications 92-3 and 92-350 to 92-376 will be accepted by H.R.S. provided they are tested to its satisfaction.


Chapter 7


SSEECCTTIIOONN 33 IInnddiiccaattoorr ssyysstteemmss 3.1 General 3.1.1 Deflection and stress monitoring system, tank level, draught and trim indicators, alarm systems etc. are to be provided to enable operating of the dock to be properly controlled. 3.2 Deflection monitoring system 3.2.1 Two completely independent systems for measuring the deflection of the dock over its length LD are to be installed. The deflection values are to be readable from the control room of the dock. 3.2.2 For docks with length LD not exceeding 50meters, alternative arrangements for ensuring a limitation of the stresses in the dock may be accepted upon special consideration. 3.2.3 For docks with lifting capacity exceeding 40000 tonnes, the deflection monitoring systems are to include arrangements for visual and audible signals, readily distinguishable from other signals and for automatic stopping of ballast pumps before the maximum permissible deflection, corresponding to the permissible bending stress, is reached.

Fire Protection, Detection and Extinction

Chapter 8


Contents

SECTION 1 General requirements SECTION 2 Fire main system and pumps SECTION 3 Fire extinguishing arrangements in machinery spaces SECTION 4 Fireman’s outfit SECTION 5 Storage of gas cylinders and dangerous materials

SECTION 6 Fire control plans


Chapter 8


SSEECCTTIIOONN 11 GGeenneerraall rreeqquuiirreemmeennttss 1.1 General 1.1.1 The requirements of Part 9 “Fire protection, detection and extinction” of the “Rules and Regulations for the Classification and Construction of Steel Ships” of the Society are to be complied with the floating docks, as far as applicable. 1.1.2 The requirements of this chapter concern the fire protection, detection and extinction of floating docks only and do not cover equipment which may be fitted for fighting fires that may occur on the docking ship. SSEECCTTIIOONN 22 FFiirree mmaaiinn ssyysstteemm aanndd ppuummppss 2.1 General 2.1.1 The floating dock is to be provided with the fire pumps, fire mains, hydrants and hoses complying as far as applicable with the requirements of Part 9, Chapter 1, Section 3 of the Rules of the Society. 2.2 Capacity and arrangement 2.2.1 Two at least - independently - driven fire pumps are to be provided on a floating dock and should be capable of delivering for fire fitting purposes a quantity of water at a pressure of 0.27 N/mm², with required capacity of not less than 25m³/h each and such pump is in any event to be capable of delivering at least the two required jets of water. 2.2.2 Sanitary, ballast bilge or general service pumps may be accepted as fire pumps, provided that they are not normally used for pumping oil and that if they are subject to occasional duty for the transfer of or pumping of oil fuel, suitable change over arrangements are fitted. 2.2.3 Relief valves are to be provided in conjunction with all fire pumps if the pumps are capable of developing a pressure exceeding the design pressure of the water service pipes, hydrants and hoses. These valves are to be so placed and adjusted as to prevent excessive pressure in any part of the fire system. 2.3 Emergency fire pump 2.3.1 The capacity of the emergency fire pump is to be not less than 40% of the total capacity of the fire pumps required and in any case not less than 25m³/hour, producing a pressure at any hydrant not less than 0.27N/mm². 2.3.2 The sea valve is to be capable of being operated from a position near the pump. The total suction head of the pump is not to exceed 4.5m under all conditions of draught, list and trim likely to


Chapter 8


be encountered of the floating dock and the suction piping is to be designed to minimize suction losses. 2.4 Number of position and hydrants 2.4.1 The number and position of hydrants is to be such that at least two jets of water not emanating from the same hydrant, one of which is to be from a single length of hose, may reach any part of the floating dock, each from a single length of hose. Furthermore, such hydrants are to be positioned near the accesses to the protected spaces. 2.5 Fire hoses and nozzles 2.5.1 The number of fire hoses to be provided, each complete with couplings and nozzles, is to be one for each 30m length of the dock and one space, but in no case less than five in all. This number does not include any hoses required in any engine or boiler room. If necessary, the number of hoses is to be increased so as to ensure that hoses in sufficient number are available and accessible at all times. Materials and dimensions of fire hoses and nozzles should be as specified in Part 9, Chapter 1, Section 3 of the Rules of the Society. 2.6 Location and arrangement of water pumps etc. of other extinguishing systems 2.6.1 Pumps required for the provision of water for other fire extinguishing systems required by this chapter, their sources of power and their controls are to be installed outside the space or spaces protected by such systems and are to be so arranged that a fire in the space or spaces protected will not put any such system out of action. SSEECCTTIIOONN 33 FFiirree eexxttiinngguuiisshhiinngg aarrrraannggeemmeennttss iinn mmaacchhiinneerryy ssppaacceess 3.1 General 3.1.1 Machinery spaces containing oil-fired boilers or oil-fired units are to be provided with any one of the following fixed fire extinguishing systems: (a) A gas system of Carbon dioxide of Halogenated hydrocarbon or another gas system (b) A high-expansion foam system (c) A pressure water-spraying system. 3.1.2 In each case if the engine and boiler rooms are not entirely separate, or if oil fuel can drain from the boiler room into the engine room, the combined engine and boiler rooms are to be considered as one compartment. 3.1.3 The fixed fire extinguishing systems are to satisfy the requirements of Part 9, Chapter 1 of the Rules of the Society.


Chapter 8


SSEECCTTIIOONN 44 FFiirreemmaann’’ss oouuttffiitt 4.1 General 4.1.1 Two, at least, firemen’s outfit complying with the requirements of Part 9, Chapter 1, Section 15 of the Rules of the Society are to be carried to the dock. 4.1.2 The firemen’s outfit and sets of personal equipment are to be so stored as to be easily accessible and ready for use and they shall be stored in widely separated positions SSEECCTTIIOONN 55 SSttoorraaggee ooff ggaass ccyylliinnddeerrss aanndd ddaannggeerroouuss mmaatteerriiaallss 5.1 General 5.1.1 Cylinders for compressed, liquefied or dissolved gases are to be clearly marked by means of prescribed identifying colours, to have a clearly legible identification of the name and chemical formula of their contents and to be properly secured. 5.1.2 Cylinders containing flammable or other dangerous gases and expended cylinders are to be stored, properly secured, on open decks and all valves, pressure regulators and pipes leading from such cylinders are to be protected against damage. Cylinders are to be protected against excessive variations in temperature, direct rays of the sun and accumulation of snow. However, such cylinders may be stored in compartments complying with the requirements of 5.1.3 to 5.1.5. 5.1.3 Spaces containing highly flammable liquids, such as volatile paints, paraffin, benzol, etc. and, where permitted, liquefied gas, are to have direct access from open decks only. Pressure-adjusting devices and relief valves are to exhaust within the compartment. Where boundary bulkheads of such compartments adjoin other enclosed spaces they are to be gastight. 5.1.4 Except as necessary for service within the space, electrical wiring and fittings will not be permitted within compartments used for the storage of highly flammable liquids or liquefied gases. Where such electrical fittings are installed, they are to be satisfactory for use in a flammable atmosphere. Sources of heat are to be kept clear of such spaces and "No Smoking" and "No Naked Light" notices are to be displayed in a prominent position. 5.1.5 Separate storage is to be provided for each type of compressed gas. Compartments used for the storage of such gases are not to be used for storage of other combustible products nor for tools or objects not part of the gas distribution system. However, these requirements may be waived considering the characteristics, volume and intended use of such compressed gases. 5.1.6 Spaces containing paints, flammable liquids or liquefied gases are to be protected by an appropriate fire-extinguishing arrangement.


Chapter 8


SSEECCTTIIOONN 66 FFiirree ccoonnttrrooll ppllaannss 6.1 Description of plans 6.1.1 General arrangement plans of the dock are to be permanently exhibited for the guidance of the dock’s officers, showing clearly each control station, the various fire sections and the particulars of the fire detection and fire alarm systems, the sprinkler installation, the fire extinguishing appliances, means of access to different compartments and routs of escape, the ventilating system including particulars of the fan control position, the position of dampers and identification numbers of the ventilating fans serving each section. 6.1.2 A duplicate set of fire control plans or a booklet containing such plans is to be permanently stored in a prominently marked weathertight enclosure outside the deck house or machinery space for the assistance of shoreside fire fighting personnel.