Part 5 Ship types Chapter 11 Non self-propelled units

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1 RULES FOR CLASSIFICATION Ships Edition July 2017 Part 5 Ship types Chapter 11 The content of this service document is the subject of intellectual property rights reserved by ("DNV GL"). The user accepts that it is prohibited by anyone else but DNV GL and/or its licensees to offer and/or perform classification, certification and/or verification services, including the issuance of certificates and/or declarations of conformity, wholly or partly, on the basis of and/or pursuant to this document whether free of charge or chargeable, without DNV GL's prior written consent. DNV GL is not responsible for the consequences arising from any use of this document by others. The electronic pdf version of this document, available free of charge from is the officially binding version.

2 FOREWORD DNV GL rules for classification contain procedural and technical requirements related to obtaining and retaining a class certificate. The rules represent all requirements adopted by the Society as basis for classification. July 2017 Any comments may be sent by to rules@dnvgl.com If any person suffers loss or damage which is proved to have been caused by any negligent act or omission of DNV GL, then DNV GL shall pay compensation to such person for his proved direct loss or damage. However, the compensation shall not exceed an amount equal to ten times the fee charged for the service in question, provided that the maximum compensation shall never exceed USD 2 million. In this provision "DNV GL" shall mean, its direct and indirect owners as well as all its affiliates, subsidiaries, directors, officers, employees, agents and any other acting on behalf of DNV GL.

3 CHANGES CURRENT This document supersedes the July 2016 edition of DNVGL-RU-SHIP Pt.5 Ch.11. Changes in this document are highlighted in red colour. However, if the changes involve a whole chapter, section or sub-section, normally only the title will be in red colour. Changes July 2017, entering into force 1 January 2018 Topic Reference Description Introduction of the significant wave height to reduce scantling requirements. Error corrections and clarifications Sec.2 [4.1] Sec.2 [5.1] Sec.2 [5.2] Sec.2 Table 1 Sec.2 [9.1] Sec.2 [3] Sec.2 [5.1.3] Sec.3 [2.1] Sec.3 [2.1.1] Sec.3 [2.1.4] Introduction of wave loads definition. Alignment to significant wave height approach. Deletion. Deletion. Alignment to significant wave height approach. Introduction of material requirements. Align to Pt.3 and fine tuning of hull girder section modulus. First paragraph deleted. Text clarified. Part of the text deleted. Part 5 Chapter 11 Changes - current Sec.3 [2.1.5] Part of the text deleted. Editorial corrections In addition to the above stated changes, editorial corrections may have been made. Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 3

4 CONTENTS Changes current... 3 Section 1 General Introduction Introduction Scope Application Class notations Ship type notations Additional class notations Definitions Terms Documentation Documentation requirements Certification Certification requirements Testing Testing during newbuilding for concrete barges...12 Part 5 Chapter 11 Contents Section 2 Hull General arrangement design Subdivision arrangement Compartment arrangement Bottom structure Structural design principles Material Main deck Bottom structure Loads Wave Loads Deck loading Airoverpressure Hull girder strength Main section modulus Split hopper barges Hull local scantling Deck structure...18 Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 4

5 7 Buckling Stresses based on direct strength analysis Fatigue strength Application Special requirements Fore peak Bottom slamming Supporting structure of towing equipment Pusher/barge or pusher/pontoon units Subdivision arrangement Hull girder strength Hull local scantling Special requirements - connecting elements Special requirements - ice strengthening Part 5 Chapter 11 Contents Section 3 Systems and equipment Steering arrangement General requirements Anchoring and mooring equipment General requirements Pusher/barge and pusher/pontoon units Machinery, systems and electrical installations General requirements Pusher/barge and pusher/pontoon units Section 4 Safety and lifesaving appliances General safety requirements General Fire safety General requirements Power supply General requirements Radio communication General requirements Lifesaving appliances General requirements...25 Section 5 Stability and opening and closing appliances Stability General requirements...27 Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 5

6 2 Opening and closing appliances Drainage Hatches and deck openings Bow height Section 6 Concrete hull (TENTATIVE RULES) Materials General requirements Design principles General requirements Loads Local loads Hull girder loads Design resistance General requirements Survey and testing Survey and testing during newbuilding of concrete barges Survey and testing after delivery of concrete barges Part 5 Chapter 11 Contents Changes historic...36 Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 6

7 SECTION 1 GENERAL Symbols For symbols and definitions not defined in this section, see Pt.3 Ch.1 Sec.4. 1 Introduction 1.1 Introduction These rules provide requirements for vessels intended to be operated as barges or pontoons. 1.2 Scope These rules include requirements for strength for both steel and concrete hull, hatches and deck openings, systems and equipment, stability and load line, and the relevant procedural requirements applicable to barges and pontoons. For barges intended to carry personnel, the scope also covers basic safety requirements. This includes fire safety, life saving appliances, power supply, and radio communication. Part 5 Chapter 11 Section Application The requirements in this chapter shall be regarded as supplementary to those given for the assignment of class rules Pt.2, Pt.3 and Pt.4 applicable for the assignment of main class Vessels built in compliance with the relevant requirements in this chapter may be given the mandatory class notation Barge or Pontoon. Vessels built in compliance with the relevant additional requirements in [2] of this chapter may be given the class notation Barge(Hopper). Vessels built in compliance with the relevant additional requirements in [6] of this chapter may be given the class notation Barge(Concrete). Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 7

8 2 Class notations 2.1 Ship type notations Vessels built in compliance with the requirements as specified in Table 1 will be assigned the class notations as follows: Table 1 Ship type notations Class notation Barge Description Qualifier Additional description Barges are vessels without sufficient means of selfpropulsion for transit. Assistance from another vessel during transit or transportation service is assumed. 1 <none> Hopper 3 Barge primarily designed for selfunloading where the port and starboard portions are hinged at the hopper end bulkheads to facilitate rotation around the longitudinal axis when the bottom opens Design requirements, rule reference Sec.1 to Sec.5 Sec.1 to Sec.5 Part 5 Chapter 11 Section 1 Pontoon Vessels without cargo hold and no means of self-propulsion for transit. <none> Vessel specifically intended for carriage of cargo on deck only Sec.1 to Sec.5 1) Guidance note: For vessels with limited means of self-propulsion an upper limit for barges/pontoons may normally be taken as machinery output giving a maximum speed less than V = 3 + L/50 knots, L not to be taken greater than 200 m. 2) Barge made of concrete will be assigned the class notation: Barge(Concrete). The survey related class notation BIS is mandatory and requirements given in Pt.6 Ch.9 Sec.1 shall be complied with. 3) Hopper is an optional qualifier for barges built for dredging operations, i.e. Barge(Hopper). 2.2 Additional class notations The following additional notations, as specified in Table 2, are typically applied to barges and pontoons: Table 2 Additional class notations Class notation Description Application Strengthened(DK) Decks strengthened for heavy cargo All ships R0, R1, R2, R3, R4, RE Service area notation All ships Guidance note: Independent of the service area notation, a barge or pontoon may be designed for a significant wave height H S, specified by the designer. ---e-n-d---o-f---g-u-i-d-a-n-c-e---n-o-t-e For a full definition of all additional class notations, see Pt.1 Ch.2. Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 8

9 3 Definitions 3.1 Terms Table 3 Definitions Terms barges pontoons hopper barge Definition an unmanned or manned vessel, without sufficient means for self-propulsion, sailing in pushed or towed units with following characteristics: the ratios of the main dimensions may deviate from those usual for seagoing ships the cargo holds are suitable for the carriage of dry or liquid cargo. an unmanned or manned vessel, without self-propulsion with following characteristics: the ratios of the main dimensions deviate from those usual for seagoing ships it is designed to carry deck load or working equipment, e.g. lifting equipment, rams etc. on deck only and have no holds for the carriage of cargo. a self-unloading barge where the port and starboard portions are hinged at the hopper end bulkheads to facilitate rotation around the longitudinal axis when the bottom opens. Part 5 Chapter 11 Section 1 4 Documentation 4.1 Documentation requirements General For general requirements to documentation, including definition of the info codes, see Pt.1 Ch.3 Sec.2. For a full definition of the documentation types, see Pt.1 Ch.3 Sec Barges and pontoons Documentation shall be submitted as required by Table 4. Table 4 Documentation requirements Object Documentation type Additional description Info Towing arrangement Z030 Arrangement plan Arrangement of towing line, fastening arrangement and details. FI Towing equipment supporting structures H050 - Structural drawing Including towing force design loads and winch load footprint. AP AP = For approval; FI = For information ACO = As carried out; L = Local handling; R = On request; TA = Covered by type approval; VS = Vessel specific Additional documentation For barges and pontoons, carrying 36 persons or more the following additional following documentation shall be submitted as required by Table 5. For class notation qualifier Concrete, additional documentation shall be submitted as required by Table 6. Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 9

10 Table 5 Documentation requirements - Class notation Barge or Pontoon carrying 36 persons or more Object Documentation type Additional description Info Safety general Structural fire protection arrangements Fire detection and alarm system Fire water system G040 Fire control plan G050 Safety control plan G060 Structural fire protection drawing G061 Penetration drawings I200 Control and monitoring system documentation Z030 Arrangement plan S010 Piping diagram (PD) S030 Capacity analysis Z030 Arrangement plan AP AP AP AP AP AP AP AP AP Part 5 Chapter 11 Section 1 Fixed fireextinguishing systems G200 Fixed fire extinguishing system documentation AP Escape routes G120 Escape route drawing AP Ventilation systems Life-saving appliances S012 - Ducting diagram (DD) S014 - Duct routing sketch G160 Life-saving arrangement plan AP AP AP AP = For approval; FI = For information ACO = As carried out; L = Local handling; R = On request; TA = Covered by type approval; VS = Vessel specific Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 10

11 Table 6 Documentation requirements - For class notation qualifier Concrete Hull structure Object Documentation type Additional description Info H010 Structural design brief H020 Design load plan H050 Structural drawing Including: overall design safety functional requirements material data design phases. Including: self-weight distribution accidental loads. Including: reinforcement in structural members reinforcement details position and density of pre-stressing arrangement pre-stressing anchorage details. FI FI AP Part 5 Chapter 11 Section 1 H080 Strength analysis Z164 - Inspection manual Q010 Quality manual Including: combination of local and global loads for different limit states calculationof the utilisation of the structural elements in the different limit states. For in-service inspection, based on design and construction considerations. Documenting valid EN ISO 9001 certificate or equivalent. FI AP FI Z260 Report Deviation reports and their closure documentation. AP Including: qualification testing of the concrete Structural fabrication H130 Fabrication specification construction procedures formwork concreting procedure for taking control specimens and testing of these procedure for curing of the concrete. FI AP = For approval; FI = For information ACO = As carried out; L = Local handling; R = On request; TA = Covered by type approval; VS = Vessel specific Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 11

12 5 Certification 5.1 Certification requirements General For a definition of the certificate types, see Pt.1 Ch.3 Sec Barges Products for Barge(Concrete) shall be certified as required by Table 7. Table 7 Certification requirements Object Certificate type Concrete materials MC Society Anchorage devices and mechanical splices Issued by Certification standard* Additional description MC Society See DNV-OS-C502 Sec.4 G200 Part 5 Chapter 11 Section 1 * Unless otherwise specified the certification standard is the rules 6 Testing 6.1 Testing during newbuilding for concrete barges Testing requirements for class notation Barge(Concrete) is given in Sec.6 [5]. Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 12

13 SECTION 2 HULL Symbols For symbols and definitions not defined in this section, see Pt.3 Ch.1 Sec.4. 1 General arrangement design 1.1 Subdivision arrangement Watertight bulkhead arrangement A watertight bulkhead shall be fitted at both ends of the hold area. In the remaining part of the hull, watertight bulkheads shall be fitted as required for the purpose of watertight subdivision and for transverse strength. For barges and pontoons with length L LL 100 m and with discharging arrangements in the bottom, the regions having such bottom openings shall be bounded by watertight transverse bulkheads from side to side Collision bulkhead Barges and pontoons shall have a collision bulkhead and an after end bulkhead. For barges and pontoons with L LL 100 m, the position of the collision bulkhead shall be determined according to Pt.3 Ch.2 Sec.2 [4]. Part 5 Chapter 11 Section 2 2 Compartment arrangement 2.1 Bottom structure The bottom structure may be built as single or double bottom. In case the barge is arranged with a double bottom refer to requirements given in Pt.3 Ch.2 Sec.3 [2] and Pt.3 Ch.3 Sec.5 [3]. The height of a double bottom shall give good access to all internal parts. The height shall not be less than 650 mm. 3 Structural design principles 3.1 Material The material requirements of Pt.3 Ch.3 Sec.1 apply in general For non self-propelled box shaped pontoons, closed barges and similar units, material grade A/AH is generally acceptable. 3.2 Main deck If the deck will be subjected to heavy point loads, plans shall be submitted showing the arrangement and position of loads as well as their magnitude. It shall be specified if all loading points will be subject to loads simultaneously, or if there will be some alternative groupings of the loads. For reduction of dynamic loads, see Table 1. Heavy point loads should preferably be supported directly by bulkheads. Decks subject to wheel loads shall have scantlings complying with requirements given in Pt.3 Ch.10 Sec.5. Dry cargo barges where the cargo holds and the main deck are supported by cantilevers are to comply with requirements given in Ch.1 Sec.5. Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 13

14 3.3 Bottom structure The bottom structure shall be considered as a grillage system being supported by ship sides and/or bulkheads. 4 Loads 4.1 Wave Loads The wave loads shall in general be taken in accordance with Pt.3 Ch.4 Sec Vessels may be designed with a specified maximum significant wave height H S as an operational limitation. When H S is specified, the dynamic loads given in Pt.3 Ch.4 and gross section modulus requirement in [5.1.1] may be reduced with the factor f r. Guidance note: The maximum significant wave height, H S, will be specified as an operational limitation in the appendix to classification certificate. Part 5 Chapter 11 Section 2 ---e-n-d---o-f---g-u-i-d-a-n-c-e---n-o-t-e For vessels with service area notation, the corresponding significant wave height H S as given in Pt.1 Ch.2 Sec.5 Table 1 shall be applied, unless otherwise specified by the designer according to [4.1.2]. 4.2 Deck loading The uniform deck loading (UDL) for cargo deck shall not be taken less than 0.7 t/m Airoverpressure Where tanks are intended to be emptied by compressed air, the maximum airoverpressure shall replace P PV in the formulae for determining the pressures P ls in Pt.3 Ch.4 Sec.6 [1.2], for the static (S) load scenario. Guidance note: The maximum airoverpressure applied in the design and used as approval basis will be stated in the appendix to classification certificate. ---e-n-d---o-f---g-u-i-d-a-n-c-e---n-o-t-e--- Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 14

15 5 Hull girder strength 5.1 Main section modulus The minimum midship gross section modulus shall not be less than the value obtained from the following formula: where: f r = reduction factor related to limitation on maximum significant wave height as defined in [4.1.2] C WO = wave parameter, as defined in Figure 1 and [5.2.1]. Part 5 Chapter 11 Section Figure 1 Wave coefficient The gross hull girder section modulus shall comply with the requirements given in Pt.3 Ch.5 Sec.2 [1.4.1], but with the following permissible stresses: σ perm = permissible hull girder bending stress, in kn/m 2, to be taken as: for for Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 15

16 Intermediate values of σ perm shall be obtained by linear interpolation. for Split hopper barges Split hopper barges longitudinal hull girder strength calculations shall be carried out for the unloading condition according to [5.2] Special harbour conditions For special harbour conditions, e.g. transient states when moving heavy structures on board from end of barge, or when the wave heights are considered to be negligible, the wave bending moment may be taken zero when calculating hull girder section modulus, see [5.1.2]. 5.2 Split hopper barges For unloading condition of split hopper barges, the following stresses, in N/mm 2, in the split hopper area for still water condition and HSM and FSM load cases shall be considered as follows: Part 5 Chapter 11 Section 2 M y-sw M z-sw = still water bending moments, in knm, related to the inertia axis y'-y' and z'-z' respectively, as shown in Figure 2 M z-dyn = bending moments related to external hydrodynamic pressure for HSM and FSM load cases, in knm, related to the inertia axis y'-y' and z'-z' respectively as shown in Figure 2, to be taken as: I y-n50 I z-n50 = moments of inertia of the cross section shown in Figure 2 related to the respective inertia axis, in m 4 e y ', e z ' = distances of the position being considered to the inertia axis y'-y' and z'-z' respectively, in m P w l h = external hydrodynamic pressure, in kn/m 2, for T SC, for HSM and FSM load cases as defined in Pt.3 Ch.4 Sec.5 [1.3] = spacing, in m, between hinges h = cargo height, in m, as shown in Figure 2 ρ = design cargo density, in t/m 3, not to be taken less than 1.2 P L = static design cargo pressure, in kn/m 2, shall be taken as: The stresses in the split hopper area shall be determined for the most unfavourable distribution of cargo and consumables. Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 16

17 T SC Figure 2 Static loads on a self-unloading barge, loaded. y' P W z' P W The hull girder stresses combined with stresses in the split hopper area, in N/mm 2, shall satisfy the following criteria: z' y' P L h Part 5 Chapter 11 Section 2 where: σ hg-sw = hull girder stress, in N/mm 2, due to vertical still water bending moment as defined in Pt.3 Ch.5 Sec.1 [5]. σ hg-dyn = hull girder stress, in N/mm 2, for HSM and FSM load cases as defined in Pt.3 Ch.5 Sec.1 [5]. Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 17

18 5.2.3 Stresses in the bearing seating and all other members of the hinge shall satisfy the following criteria: where: σ b = bending stress, in N/mm 2. τ = shear stress, in N/mm 2. 6 Hull local scantling 6.1 Deck structure If the deck girders constitute a grillage system, direct strength calculations according to Pt.3 Ch.6 Sec.6 shall be made applying the design load sets specified in Pt.3 Ch.6 Sec.2 (or other specified design load sets given by the designer), to verify that the stress criteria given in Pt.3 Ch.6 Sec.6 [2.2] are complied with. Part 5 Chapter 11 Section 2 7 Buckling 7.1 Stresses based on direct strength analysis The normal stresses and shear stress taken from direct strength assessment to be applied for buckling capacity calculation of plate panels (see Pt.3 Ch.8) shall be corrected as given in DNVGL-CG-0128 Sec.3. 8 Fatigue strength 8.1 Application Fatigue strength calculations shall be performed for barges and pontoons being operated as an offshore installation, e.g. fixed to a specific oil field for longer periods with no possibilities for survey and intended to operate in harsh weather conditions. For such units, verification of fatigue strength is required when their length exceeds 150 m. If applicable, all longitudinal strength members on external shell and deck shall be verified for compliance with the prescriptive fatigue strength requirements in Pt.3 Ch.9. 9 Special requirements 9.1 Fore peak Barges and pontoons with unrestricted operations, shall be checked for bow impact according to Pt.3 Ch.10 Sec.1. If necessary, both ends shall be reinforced, see also [1.1.1]. Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 18

19 9.2 Bottom slamming The bottom in barges and pontoons with L > 100 m shall be strengthened against slamming, see Pt.3 Ch.10 Sec.2. In the formula for C SL-et and C SL-ft the ballast draught T F-e and T F-f may be substituted by full draught T. 9.3 Supporting structure of towing equipment Towing hooks, winches and brackets with their supporting structure shall be capable of withstanding the breaking load P b of the towline. The breaking load P b shall not be taken less than the towline minimum breaking strength given in Pt.3 Ch.11 Sec.1 Table 1 in Pt.3 Ch.11 Sec.1 [3]. Acceptable stress levels in the supporting structure resulting from bending moments and shearing forces calculated for the load P b are: Part 5 Chapter 11 Section 2 where: σ b = bending stress, in N/mm 2 τ = shear stress, in N/mm 2 σ vm = combined stress, in N/mm 2 10 Pusher/barge or pusher/pontoon units 10.1 Subdivision arrangement Collision bulkhead The barge/pontoon is at least to have a collision bulkhead between 0.05 L and 0.08 L from F.P. and an after peak bulkhead at a suitable distance forward of the connection area Hull girder strength The longitudinal strength shall comply with the requirements given in Pt.3 Ch.5. For the combined pusher/ barge unit or pusher/pontoon unit of type I the longitudinal strength of the barge/pontoon shall be based on a length L as given in Pt.3 Ch.1 Sec.4 [3] measured between the bow of the barge/pontoon and the stern of the pusher Hull local scantling Structural members are in general to comply with the rule requirements for hull structures in Pt.3 based on the rule length of the combined unit. Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 19

20 Scantlings of the after body of the barge/pontoon are in no case to be less than required for the barge/pontoon in unconnected condition Special requirements - connecting elements The pusher and the aft part of the barge/pontoon shall be so designed as to allow the pusher to interact with the stern area of the barge/pontoon. The mutual forces between the two structures shall be transferred by a system of contact surfaces. The connection of type I shall be secured by at least one mechanical locking device. For type II a flexible connection shall be provided The connection forces shall be based on the most severe load conditions to be expected in service. Wave-induced loads shall be determined according to accepted theories, model tests or full scale measurements. The loads shall be referred to extreme wave conditions, which should be based upon wave statistics for the expected route or service area, in case of restricted service. For unlimited worldwide service North Atlantic wave statistics shall be used. The resulting loads shall be given as long term values corresponding to 10 8 wave encounters (most probable largest loads at a probability of exceedance equal to 10-8 ). Realistic conditions with respect to speed and navigation in heavy weather shall be considered, also taking into account the general assumption of competent handling. Part 5 Chapter 11 Section Direct calculations shall be made in order to evaluate the stresses in all relevant strength members of the connection between barge/pontoon and pusher. Shearing forces and or longitudinal bending moments in the sections in question are found from direct calculations for barge/pontoon and pusher in still water and in waves. Pre-loading from locking devices is also to be taken into account. The stresses in the connection, in N/mm 2, for the static plus dynamic (S+D) design load scenario shall not exceed the following permissible values: For forged and cast steel parts, k, shall be taken as: All relevant strength members shall have effective continuity, and details which may cause stress concentration shall have gradual transitions Deflections of the structural parts in the connection structure and the necessary pre-loading shall be considered in order to avoid hammering when the most unfavourable reaction forces occur. Calculations of these deflections shall be submitted Locking devices and or other connection equipment are subject to approval. If based on hydraulic operation the connecting system shall be mechanically lockable in closed position with remote indication on the bridge. Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 20

21 10.5 Special requirements - ice strengthening Pusher/barge units or pusher/pontoon units with type I connection system may be given an ice class notation provided relevant requirements given in Pt.6 Ch.6 regarding machinery and hull strengthening are complied with The requirements to machinery (in the pusher) and hull strengthening shall be based on a displacement which is the sum of the displacements of barge/pontoon and pusher The hull strengthening of the exposed part of the pusher shall comply with the requirements for the aft end of the combined pusher/barge unit or pusher/pontoon unit. Part 5 Chapter 11 Section 2 Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 21

22 SECTION 3 SYSTEMS AND EQUIPMENT 1 Steering arrangement 1.1 General requirements If rudder is installed, the steering arrangement shall comply with the requirements given in Pt.3 Ch.14 Sec.1 as far as these rules are found to be relevant for barges and pontoons. When calculating the rudder force, the speed shall not be taken less than 8 knots. 2 Anchoring and mooring equipment 2.1 General requirements For manned barges and pontoons with equipment number EN less than 205 the anchor and chain equipment specified in Pt.3 Ch.11 Sec.1 Table 1 may be reduced, on application from the owners, based upon a special consideration of the intended service area of the vessel. The reduction shall not be more than given for the service notation R4 in Pt.3 Ch.11 Sec.1 Table 3. Part 5 Chapter 11 Section Unmanned barges and pontoons may be accepted without anchoring equipment installed The equipment number EN for determining the equipment according to Pt.3 Ch.11 Sec.1 Table 1 shall be determined for pontoons carrying lifting equipment, rams etc. by the following formula: EN = Δ 2/3 + B f b + f w Δ f b f w = displacement of the pontoon, in t, at maximum anticipated draught = distance, in m, between pontoon deck and waterline = wind area of the erections on the pontoon deck, in m 2, which are exposed to the wind from forward, including houses and cranes in upright position In special cases, upon owner s request, for manned pontoons the number of anchors may be reduced to one and the length of the chain cable to 50% of the length required by Pt.3 Ch.11 Sec.1 Table If necessary for a special purpose, for pontoons mentioned under [2.1.4], the anchor mass may be further reduced by up to 20%. Upon owner s request the anchor equipment may be dispensed with. If not equipped with anchoring equipment, this will be stated in the appendix to the class certificate If a steel wire rope shall be provided instead of a stud link chain cable on manned barges and pontoons, the requirements given in Pt.3 Ch.11 Sec.1 [5] shall be complied with Anchor equipment fitted in addition to that required herein, e.g. for positioning purposes, is not part of classification. 2.2 Pusher/barge and pusher/pontoon units The pusher/barge or the pusher/pontoon unit shall have equipment corresponding to an equipment number which shall be calculated for the combined pusher/barge or pusher/pontoon unit according to Pt.3 Ch.11 Sec.1 [3]. Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 22

23 3 Machinery, systems and electrical installations 3.1 General requirements If the barge or pontoon is arranged with machinery and electrical installations, relevant requirements given in Pt.4 shall be complied with. 3.2 Pusher/barge and pusher/pontoon units Machinery, bilge system, fire extinguishing plant Machinery, pumps, piping systems, fitting, materials, bilge system and fire extinguishing plant shall comply with Pt.4, as relevant for barges/pontoons. Part 5 Chapter 11 Section 3 Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 23

24 SECTION 4 SAFETY AND LIFESAVING APPLIANCES 1 General safety requirements 1.1 General For barges and pontoons designed to carry 36 persons or more the safety requirements in this section shall apply The yard or builder shall submit evidence of these topics being accepted by the respective Administration, in which the same will be also be acceptable to the Society For manned barges and pontoons with less than 36 persons, the requirements herein will be reviewed on a case by case basis. 2 Fire safety 2.1 General requirements Part 5 Chapter 11 Section In absence of specific safety requirements from the respective flag administration, the barge shall comply with the cargo ship fire safety requirements of Ch.II-2 of SOLAS 1974 as amended. 3 Power supply 3.1 General requirements For barges and pontoons with a power generation plant, at least two main generator sets shall be provided. The capacity shall be sufficient to maintain the barge in normal operational conditions with any one main generator out of operation A self-contain emergency source of power shall be provided. The emergency source of power and its associated equipment shall be located on or above the freeboard deck, and independent of the main electrical power required by [3.1.1] The requirements for a separate emergency source of power may be omitted for installations with two independent engine rooms when compliant with Pt.4 Ch.8 Sec.2 [3.1.4] In case of failure in the main source of electrical power, the emergency source of power shall be automatically connected to the emergency switchboard unless a transitional source of power is provided. The emergency source of power shall be capable of supplying simultaneously the services listed for at least 18 hours emergency lighting for machinery spaces, control stations, alleyways, stairways, exits and elevators emergency lighting for embarkation stations on decks and over sides emergency lighting for stowage position(s) for firemen s outfits emergency lighting for helicopter landing decks navigation and special purpose lights and warning systems including helicopter landing lights general alarm and communications systems fire detection and alarm systems Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 24

25 fire extinguishing systems The transitional source of power, if required, shall be capable of supplying the services listed for at least 30 minutes: emergency lighting general alarm and communications systems fire detection and alarm systems The electrical installation shall comply with relevant requirements given in Pt.4 Ch.8. 4 Radio communication 4.1 General requirements In absence of specific radio communication requirements from the respective flag administration, the barge shall be provided with a radio-telephone station complying with the provision of Chapter IV of SOLAS 1974 as amended and at least one emergency position-indicating radio beacon (EPIRB) The radio station shall be subject to survey by the administration which issue the licence or its authorised representative before the radio station is put into service. Part 5 Chapter 11 Section The radio station shall be surveyed once every 12 months, carried out by an officer of the Administration or its authorised representative, or by a qualified radio service engineer from a local radio firm approved by the Society. 5 Lifesaving appliances 5.1 General requirements In absence of specific lifesaving appliances requirements from the respective flag administration, the barge is to comply with the requirements given in Part A and Section I of Part B of Ch.III of SOLAS 1974, as amended, and with the applicable provisions of the International Life-Saving Appliance (LSA) Code. Furthermore, under the same condition the articles [5.1.2] to [5.1.7] will also apply The barge shall carry one or more lifeboats complying with the requirement of section [4.6], [4.7], [4.8] and [4.9] of the LSA Code of such aggregate capacity on each side of the ship as will accommodate at least 50% of all persons onboard In addition, inflatable or rigid liferafts complying with the requirement of section [4.2] and [4.3] of the LSA Code, of such aggregate so that there will be survival craft on each side of the barge to accommodate all persons onboard In lieu of the requirement in [5.1.2] and [5.1.3], barges and pontoons of less than 85 m in length or barges and pontoons with appropriate damage stability as per SOLAS SPS Code, may carry on each side of the barge one or more life rafts complying with the requirement of section [4.2] and [4.3] of the LSA Code of such aggregate as will accommodate all persons onboard The barge shall carry at least one rescue boat complying with the requirement of section 5 of the LSA Code Personal life-saving appliances shall comply with requirements given in SOLAS Reg.III/32. Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 25

26 5.1.7 Survival craft embarkation and launching arrangement shall comply with requirements given in SOLAS Reg.III/33. Part 5 Chapter 11 Section 4 Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 26

27 SECTION 5 STABILITY AND OPENING AND CLOSING APPLIANCES 1 Stability 1.1 General requirements Barges or pontoons with a length L LL of 24 m and above shall comply with the intact stability requirements according to Pt.3 Ch The alternative stability criteria as given in 2008 IS Code Part B Ch.2.2 may be applied for vessels with class notations Barge, Pontoon or Barge(Concrete) for which the application requirements of 2008 IS Code Part B Ch are met Vessels with class notation Barge(Concrete) shall be capable of surviving a minor hull damage that results in flooding of any one compartment bounded by the shell. The minor damage should be assumed to occur anywhere in the length of the barge, but not on a watertight bulkhead or deck. The barge's survival capabilities after the specified damage shall be in accordance with the damage stability criteria of IMO resolution MSC.235(82) chapter 3.3. Other recognized international damage stability standards may however be accepted as an alternative to IMO resolution MSC.235(82) subject to agreement with the Society. Part 5 Chapter 11 Section 5 2 Opening and closing appliances 2.1 Drainage Barges or pontoons are normally to be provided with means for drainage of cargo holds, engine rooms and watertight compartments and tanks which give major contribution to the vessel's buoyancy and floatability As far as applicable and with the exemptions specified in the following, the rules and principles for drainage of ship with propulsion machinery shall be complied with Manned barges and pontoons shall be provided with a permanently installed bilge system with power bilge pumps. The bilge system shall have suctions in rooms mentioned in [2.1.1]. An additional emergency bilge suction shall be provided in engine rooms. Dry compartments in fore- and after peaks may be drained by effective hand pumps. Rooms situated on deck may be drained directly overboard Manned barges and pontoons for unlimited service shall be equipped with two permanently installed bilge pumps. Manned barges and pontoons with restricted service may have one bilge pump. Ballast pumps may be used as bilge pumps. Where only one permanently installed bilge pump is installed, this pump shall not serve as fire pump Ballast systems shall comply with the requirements for ballast systems in ships. However, one ballast pump may be accepted. Alternative methods for emptying ballast tanks, e.g. by means of compressed air and bottom valves, may be accepted upon consideration in each case. Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 27

28 2.1.6 Unmanned barges and pontoons shall be provided with drainage facilities for compartments rooms mentioned in [2.1.1]. For cargo holds the facilities shall be so arranged that drainage can be performed in loaded conditions, for instance by arranging ducts for portable pumps to bilge wells or piping from the connection point of the bilge pump to the bilge wells. Other compartments which shall be drained by portable equipment shall be provided with suitable access openings for such equipment. Any engine room or pump room shall have bilge suctions to available pumps Unmanned barges and pontoons may have portable bilge pumping equipment only, arranged with their own power supply. For barges and pontoons for unlimited service such equipment shall be permanently installed. For barges and pontoons for restricted service the rules are based on the assumption that suitable bilge pumping equipment is available on board the barge or on board the towing/pushing vessel. This assumption will be included in the appendix to the class certificate to be issued for the barge. 2.2 Hatches and deck openings Deck openings in barges and pontoons shall normally have hatch coamings and covers as given in Pt.3 Ch.12. Minimum design pressure for hatch covers in dry cargo barges is 3.5 kn/m 2. Part 5 Chapter 11 Section The closing arrangement of deck openings for barges and pontoons with restricted service and high freeboard will be specially considered. 2.3 Bow height The requirement for minimum bow height given in Pt.3 Ch.2 Sec.2 [2] may be dispensed with. Guidance note: For manned barges and pontoons the requirements for bow height should be clarified with the respective flag administration. ---e-n-d---o-f---g-u-i-d-a-n-c-e---n-o-t-e--- Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 28

29 SECTION 6 CONCRETE HULL (TENTATIVE RULES) 1 Materials 1.1 General requirements A barge may be constructed using the following materials: steel reinforcement, FRP reinforcing rods, LWA concrete, NW concrete, structural grout, or fibre reinforced grout Concrete is in this standard used as a common reference to NW concrete, LWA concrete, structural grout, fibre reinforced structural grout and fibre reinforced structural concrete if the above specified materials are not included specifically Definitions (for further definitions, see DNV-OS-C502 Sec.4): NW denotes normal weight concrete LWA concrete denotes lightweight aggregate concrete fibre reinforced concrete is concrete mixed with either steel or FRP fibres fibre reinforced structural grout is grout mixed with either steel or FRP fibre FRP fibres are fibres cut from fibre reinforced polymers. Part 5 Chapter 11 Section The material to be used in a concrete barge shall be in accordance with the requirements specified in DNV-OS-C502 Sec Testing of concrete, grout, steel, FRP, additions, admixtures and constituent materials shall all be in accordance with the requirements of DNV-OS-C502 Sec.4 M The material properties of concrete (with and without fibres) shall be in accordance with the requirement DNV-OS-C502 Sec.4 C and DNV-OS-C502 Sec.4 D The material properties of grout (with and without fibres) shall be in accordance with the requirement DNV-OS-C502 Sec.4 C, DNV-OS-C502 Sec.4 E and DNV-OS-C502 Sec.4 F For concrete, fibre reinforced concrete, structural grout and fibre and reinforced structural grout; the 28 days characteristic compressive strength, f ck, is defined as the lower 5 th percentile found from statistical analysis of tests on cylindrical specimens with diameter 150 mm and height 300 mm For NW concrete, LWA concrete and fibre reinforced concrete; normalized compressive and tensile strength are required in detailed designed of structural members. Normalized values are given in DNV-OS- C502 Sec For LWA concrete, grout, fibre reinforced concrete and fibre reinforce grout; MC material certificates are required, documenting specific product properties. For further details, see DNV-OS-C502 Sec For FRP reinforcement MC material certificates are required, documenting specific product properties. For further details, see DNV-OS-C502 Sec MC material certificates for NW Concrete, reinforcement and tendons as required by DNV-OS-C502 Sec.4 shall be submitted For fatigue properties of concrete, LWA concrete, fibre reinforced concrete, grout and fibre reinforced grout; references are made to DNV-OS-C502 Sec.6 M200. Parameters defining the fatigue parameters shall be defined in the material certificates. Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 29

30 MC material certificates for NW Concrete, reinforcement and tendons as required by DNV-OS-C502 Sec.4 shall be submitted Anchorage devices and mechanical splices shall be documented by product certificates, see DNV-OS- C502 Sec.4 G Friction welded end anchorages on rebars (T-heads) shall be qualified tested in advance with the actual type of rebar and be routinely tested during production. The test program shall include a tension test and a bend test to document strength and ductility of the connection. The friction weld shall not fail before the rebar Welding procedures, together with the extent of testing for weld connections relevant to reinforced concrete and concrete structures, shall be specified and approved in each case The concrete material and steel material shall be documented in accordance with DNV-OS-C502 Sec.4 A Design principles 2.1 General requirements Part 5 Chapter 11 Section The design shall be performed according to the load and resistance factor design format (LRFD method) as detailed in DNV-OS-C502 Sec.6. The design shall be carried out for the limit states of strength (ULS), accident (ALS), fatigue (FLS) and serviceability (SLS) Detailed design for structural capacity, water tightness (SLS), Fatigue life and Progressive collapse shall be carried out in accordance with DNV-OS-C502 Sec The applied loads (ULS and SLS) on a concrete barge as defined in [3.1] and [3.2] are based on rules for classification: SHIP Pt.3 combined with partial load factors as given in DNV-OS-C502 Sec.5 D Relevant accidental conditions (ALS) shall be included in the design, see DNV-OS-C502 Sec.5 C400. Accidental loads, including collision loads, shall not be less than in accordance with DNV-OS-A101 D Fatigue life (FLS) shall be carried out as given in DNV-OS-C502 Sec.6 M with minimum design life 20 years. Guidance note: The fatigue life may be calculated applying a long term distribution based on ULS loads, excluding partial load factors, of 20 years (10 8 cycles), assuming a Weibull shape parameter e-n-d---o-f---g-u-i-d-a-n-c-e---n-o-t-e Response from hull girder loads and local pressures shall be combined in accordance with DNV-OS- C502 Sec.5 D In order to document transverse strength, the design shall be performed applying transverse hull girder loads in combination with local loads. The vertical wave bending moments in transverse direction may be based on [3.2.2], exchanging L with B, and applying k wm = 1.0 between port and starboard side. The vertical wave shear forces in transverse direction may be based on [3.2.3], applying k wqp(n) = 0.7 between port and starboard side For barges with restricted service, C W and C WO applied in order to establish hull girder loads ([3.2]) and local loads ([3.1]) may be reduced as given in Table 1. Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 30

31 2.1.9 For barges intended to operate in a specific area, the wave induced hull girder loads, sea pressures and accelerations may be based on wave load analysis applying site specific scatter diagram with minimum 20 years return period. This limitation will then be stated in the appendix to the classification certificate. Guidance note: The wave load analysis should be carried out applying all headings and with Cos 2 wave spreading profile. In order to document transverse strength, it is expected that beam sea with wave length approximately equal to the breadth of the barge will be will be dimensioning. 3 Loads 3.1 Local loads ---e-n-d---o-f---g-u-i-d-a-n-c-e---n-o-t-e The design sea pressure acting on side, bottom and weather deck shall be taken as the sum of the static and the dynamic pressure in kn/m 2 as: For load point below summer load waterline: P sea = 10 h 0 f, G, Q + k sea P W f, E Part 5 Chapter 11 Section 6 For load point above summer load waterline: where: P sea = k sea P W f, E k sea γ f, G, Q γ f, E P W = factor depending on limit state = 0.5 for SLS = 1.0 for ULS = partial load factor for permanent and functional loads as given in DNV-OS-C502 Sec.5 D = partial load factor for environmental loads as given in DNV-OS-C502 Sec.5 D = dynamic sea pressure, in kn/m 2, as given in Pt.3 Ch All tanks shall be designed for the following internal design pressure in kn/m 2 : where: P AV = ρgh s f, G, Q + k av ρa Z f, E k av h s a Z = factor depending on limit state = 0.5 for SLS = 1.0 for ULS = vertical distance in m from the load point to the top of tank, excluding smaller hatchways = vertical acceleration as given in Pt.3 Ch.4 Sec.3 [3.2.3], taken in centre of gravity of tank For tanks where the air pipe may be filled during filling operations, the following additional internal design pressure in kn/m 2 shall be considered: P d = (ρ gh s + P drop-2 ) f, G, Q Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 31

32 where: P drop-2 = calculated pressure drop, in kn/m 2, as further described in Pt.3 Ch.4 Sec.6 Guidance note: This internal pressure needs not to be combined with extreme environmental loads. Normally only static global response need to be considered. ---e-n-d---o-f---g-u-i-d-a-n-c-e---n-o-t-e The weather deck shall be designed for the following design pressure in kn/m 2 : where: q a Z-env P dk = q(g f, G, Q + k av a Z-env f, E ) = deck loading in t/m 2. q shall not be taken less than 0.7 T = vertical envelope acceleration, in m/s 2, as defined in Pt.3 Ch.4 Sec.3 [3.3.3] for the location considered For concrete barges with L>100 m, the bottom forward shall be strengthened against slamming, applying the following impact pressure in kn/m 2 : Part 5 Chapter 11 Section 6 P slam = P SL f, E where: P SL = design slamming pressure as given in Pt.3 Ch.10 Sec.2. The ballast draught T F may be substituted by full draught T SC. Guidance note: This impact pressure is only to be considered for the ULS case and needs not to be combined with extreme environmental loads. Normally only static global response need to be considered. ---e-n-d---o-f---g-u-i-d-a-n-c-e---n-o-t-e The forces in kn from cargo, equipment or other components acting on supporting structures shall be taken as: where: k at = factor depending on limit state = 0.67 for SLS P Vd = (g f, G, Q + k av a Z-env γ f, E ) M P Hd = (g f, G, Q + k at a Y-env γ f, E ) M = 1.0 for ULS k av = as given in [3.1.2] a Y-env = transverse envelope acceleration, in m/s 2, as defined in Pt.3 Ch.4 Sec.3 [3.3.2] for the location considered a Z-env M = vertical envelope acceleration, in m/s 2, as given in Pt.3 Ch.4 Sec.3 [3.3.3] for the location considered = mass of cargo, equipment or other components in t Rules for classification: Ships DNVGL-RU-SHIP Pt.5 Ch.11. Edition July 2017 Page 32