RULES FOR CLASSIFICATION Inland navigation vessels. Part 5 Ship types Chapter 7 Pontoons. Edition December 2015 DNV GL AS

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1 RULES FOR CLASSIFICATION Inland navigation vessels Edition December 2015 Part 5 Ship types Chapter 7 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. December 2015 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 is a new document. The rules enter into force 1 July Part 5 Chapter 7 Changes - current Rules for classification: Inland navigation vessels DNVGL-RU-INV-Pt5Ch7. Edition December 2015 Page 3

4 CONTENTS Changes current...3 Section 1 Scantling and arrangement requirements for pontoons Symbols General Arrangement Scantlings... 6 Part 5 Chapter 7 Contents Rules for classification: Inland navigation vessels DNVGL-RU-INV-Pt5Ch7. Edition December 2015 Page 4

5 SECTION 1 SCANTLING AND ARRANGEMENT REQUIREMENTS FOR PONTOONS 1 Symbols L = rule length [m] defined in Pt.3 Ch.1 Sec.1 [1] t = net thickness [mm] of plating k = material factor defined in Pt.2 Ch.5 Sec.1 [2.4] and Pt.2 Ch.5 Sec.1 [3.2] 2 General 2.1 Application Vessels complying with the requirements of this section are eligible for the assignment of the type and service notation Pontoon, as defined in Pt.1 Ch.2 Sec.2 [7.1.4] Vessels dealt with in this section shall comply with the requirements stated under Pt.1, Pt.2, Pt.3 and Pt.4 of the rules for inland navigation vessels, as applicable, and with the requirements of this section, which are specific to pontoons. Part 5 Chapter 7 Section Documents to be submitted In addition to the documentation requested in the Pt.3 Ch.1 Sec.2, the following documents shall be submitted to the Society: cargo weight distribution on the deck equipment weight and distribution. 3 Arrangement 3.1 Hull structure Framing In general, vessels with service notation Pontoon are of flush deck single hull type, built in the longitudinal system. Longitudinal stiffening members shall be supported by transverses arranged to form ring systems Supports for docking Adequate supports shall be fitted on the longitudinal centreline in order to carry loads acting on the structure when the pontoons are in dry dock Truss arrangement supporting deck loads Where truss arrangements may be used as supports of the deck loads, including top and bottom girders in association with pillars and diagonal bracing, the diagonal members are generally to have angles of inclination with the horizontal of about 45 and cross-sectional area of about 50% that of the adjacent pillars. Rules for classification: Inland navigation vessels DNVGL-RU-INV-Pt5Ch7. Edition December 2015 Page 5

6 3.2 Lifting appliances Crane position during navigation For pontoons where a crane is fitted on the deck, the crane boom shall be lowered and efficiently secured to the pontoon during the voyage. 4 Scantlings 4.1 General The scantlings of the hull structure shall be determined in compliance with Pt.3 Ch.4, taking into account additional requirements defined in [4.2]. 4.2 Additional requirements Minimum net thicknesses The minimum thicknesses shall be obtained from Table 1. Part 5 Chapter 7 Section 1 Table 1 Minimum net thicknesses Plating t [mm] Decks, sides, bottom, bulkheads, web of primary supporting members, web of ordinary stiffeners and other structures Keel plate for L 40 m: t = L k 0.5 for L > 40 m: t = L k 0.5 t =thickness of adjacent bottom plating Plating and stiffeners subjected to wheeled loads shall comply with Ch.4 Sec Primary supporting members The design pressure of bottom primary supporting members shall be determined using γ = 1 for the draught coefficient. In the case of primary supporting members forming a grillage, the scantlings shall be determined by direct calculation as specified in Pt.3 Ch.3 Sec Reinforcements Reinforcements shall be provided at places where the hull is heavily stressed, as the securing points of the towing ropes. Rules for classification: Inland navigation vessels DNVGL-RU-INV-Pt5Ch7. Edition December 2015 Page 6

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