IAC S I A C I N T E R N AT I O N A L A S S O C I AT I O N S O F C L A S S I F I C AT I O N S O C I E T I E S C o n t a i n e r CONTAINER SHIPS S h i p s : Guidelines for Surveys, Assessment G u and Repair of Hull Structures id e lin e The International Association of Classification Societies s (IACS) has produced a series of manuals to assist the fo r Surveyors of IACS Member Societies, and other S interested parties involved in the survey, assessment and u r v repair of hull structures for certain ship types. e y s , This manual gives guidelines for a container ship which is A s constructed with a single deck, double side skin tanks, s e passageways and double bottom in the cargo space area, s s and is intended exclusively to carry cargo in containers in m e the cargo holds, on deck and on hatch covers. n t a n The guidelines focus on the IACS Member Societies’ d survey procedures but may also be useful in connection R e with the inspection/examination schemes of other p a regulatory bodies, owners and operators. ir o f The manual includes a review of survey preparation H u guidelines, which cover the safety aspects related to the ll S performance of the survey, the necessary access t r facilities, and the other preparation necessary before the uc CONTAINER SHIPS t surveys can be carried out. u r e s The survey guidelines encompass the different main structural areas of the hull where damages have been Guidelines for Surveys, Assessment recorded, focusing on the main features of the structural items of each area. and Repair of Hull Structures First Edition ISBN 1 85609 296 8 IAC S INTERNATIONAL ASSOCIATION OF CLASSIFICATION SOCIETIES CONTAINER SHIPS Guidelines for Surveys, Assessment and Repair of Hull Structures IACS – International Association of Classification Societies,2005 All rights reserved. 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[5886] IACS BULKCARRIERS: GUIDELINESFORSURVEYS, ASSESSMENTANDREPAIROFHULLSTRUCTURE Books in the same series: Bulk Carriers: Guidelines for Surveys, Assessment and Repair of Hull Structures Condition Evaluation of Tanker Structures General Cargo Ships: Guidelines for Surveys Assessment and Repair of Hull Structures Guidance Manual for the Inspection and Condition Assessment of Tanker Structures Guidance Manual for Tanker Structures Guidelines for Ballast Tank Coatings and Surface Preparation Guidelines for Coatings Maintenance and Repairs Guidelines for the Inspection and Maintenance of Double Hull Tanker Structures Shipbuilding and Repair Quality Standard First Published 2005 ISBN 1 85609 296 8 All Rights Reserved British Library Cataloguing in Publication Data Container ships guidelines for surveys, assessment and repair of hull structures 1. Container ships – Maintenance and repair 2. Hulls (Naval architecture) – Maintenance and repair 3. Ships – Inspection I. International Association of Classification Societies. 623.8’245’0288 ISBN-10: 1856092968 Published and Printed by: Witherby & Co. Ltd 32-36 Aylesbury Street, London EC1R 0ET Tel. No: 020 7251 5341 Fax No: 020 7251 1296 International Tel No: +44 (0)20 7251 5341 International Fax No: +44 (0)20 7251 1296 E-Mail: [email protected] www: witherbys.com iv INTERNATIONALASSSOCIATIONOFCLASSIFICATIONSOCIETIES IACS BULKCARRIERS: GUIDELINESFORSURVEYS, ASSESSMENTANDREPAIROFHULLSTRUCTURE Contents 1 Introduction 5 Structural detail failures and page 1 repairs page 21 2 Class survey requirements 5.1 General page 21 page 3 5.2 Catalogue of Structural Detail 2.1 Periodical Classification Surveys Failures and Repairs page 21 page 3 2.2 Damage and Repair Surveys page 4 Part 1 Cargo hold region page 23 2.3 Voyage Repairs and Maintenance Area 1 Upper Deck Structures page 25 page 4 Area 2 Side Structure Including Side 3 Technical background for Tanks page 55 surveys Area 3 Transverse Bulkhead Structure page 7 page 75 3.1 General page 7 Area 4 Double Bottom Tank Structure 3.2 Definitions page 7 page 83 3.3 Structural Damages and Deterioration page 9 Part 2 Fore and aft end 3.4 Handling of Defects page 12 regions page 103 3.5 IACSEarlyWarning Scheme (EWS) for Area 1 Fore End Structures page 105 Reporting of Significant Hull Damage Area 2 Aft End Structures page 119 page 13 Area 3 Stern Frame,Rudder Arrangement 4 Survey planning, preparation and Propeller Shaft Support page 129 and execution page 15 Part 3 Machinery and 4.1 General page 15 accommodation 4.2 Conditions for Survey page 15 spaces page 149 4.3 Access Arrangement and Safety Area 1 Engine Room Structure page 151 page 16 Area 2 Accommodation Structure page 159 4.4 Personal Equipment page 17 4.5 Thickness Measurement and Fracture Detection page 19 4.6 Survey at Sea or at Anchorage page 19 4.7 Documentation on Board page 20 INTERNATIONALASSOCIATIONOFCLASSIFICATIONSOCIETIES CONTENTS v IACS BULKCARRIERS: GUIDELINESFORSURVEYS, ASSESSMENTANDREPAIROFHULLSTRUCTURE vi INTERNATIONALASSOCIATIONOFCLASSIFICATIONSOCIETIES IACS CONTAINERSHIPS: GUIDELINESFORSURVEYS, ASSESSMENTANDREPAIROFHULLSTRUCTURE 1 INTRODUCTION 1 Introduction The International Association of Classification Societies (IACS) has produced a series of manuals to assist the surveyors of IACS Member Societies and other interested parties involved in the survey, assessment and repair of hull structures of certain ship types. This manual gives guidelines for a container ship which is constructed with a single deck, double side skin tanks, passageways and double bottom in the cargo space area, and is intended exclusively to carry cargo in containers in the cargo holds, on deck and on hatch covers. Figure 1 shows the general view of a typical container ship. Figure 1 General view of a typical container ship The guidelines focus on the IACS Member Societies’ survey procedures but may also be useful in connection with the inspection/examination schemes of other regulatory bodies, owners and operators. The manual includes a review of survey preparation guidelines, which cover the safety aspects related to the performance of the survey, the necessary access facilities, and the other preparation necessary before the surveys can be carried out. The survey guidelines encompass the different main structural areas of the hull where damages have been recorded, focusing on the main features of the structural items of each area. INTERNATIONALASSOCIATIONOFCLASSIFICATIONSOCIETIES 1 INTRODUCTION 1 IACS CONTAINERSHIPS: GUIDELINESFORSURVEYS, ASSESSMENTANDREPAIROFHULLSTRUCTURE 1 INTRODUCTION An important feature of the manual is the inclusion of the section which illustrates examples of structural deterioration and damages related to each structural area and gives what to look for, possible cause, and recommended repair methods, when considered appropriate. The “IACS Early Warning Scheme (EWS)”, with the emphasis on the proper reporting of significant hull damages by the respective Classification Societies, will enable the analysis of problems as they arise, including revisions of these Guidelines. This manual has been developed using the best information currently available. It is intended only as guidance in support of the sound judgment of surveyors, and is to be used at the surveyors’ discretion. It is recognized that alternative and satisfactory methods are already applied by surveyors. Should there be any doubt with regard to interpretation or validity in connection with particular applications, clarification should be obtained from the Classification Society concerned. Figure 2shows a typical cargo hold structural arrangement. Box beam Longitudinal Longitudinal deck girder bulkhead Hatch side and hatch end coamings Watertight Passage transverse bulkhead way Side tank Side stringer Stringer deck Inner bottom Double bottom tank Non-watertight transverse bulkhead Double C.L Double bottom girder bottom floor Duct keel Figure 2 Typical cargo hold configuration for a container ship 2 INTERNATIONALASSOCIATIONOFCLASSIFICATIONSOCIETIES 1 INTRODUCTION IACS CONTAINERSHIPS: GUIDELINESFORSURVEYS, ASSESSMENTANDREPAIROFHULLSTRUCTURE 2 CLASS SURVEY REQUIREMENTS 2 Class survey requirements 2.1 Periodical Classification Surveys 2.1.1 General For Class the programme of periodical hull surveys isof prime importance as far as structural assessment of the cargo holds and the adjacent tanks is concerned. The programme of periodical hull surveys consists of Annual, Intermediateand Special Surveys. The purpose of the Annualand Intermediate Surveysis to confirm that the general condition of the vessel is maintained at a satisfactory level. The Special Surveysof the hull structure are carried out at five year intervals with the purpose of establishing the condition of the structure to confirm that the structural integrity is satisfactory in accordance with the Classification Requirements, and will remain fit for its intended purpose until the next Special Survey, subject to proper maintenace and operation. The Special Surveysare also aimed at detecting possible damage and to establish the extent of any deterioration. The Annual, Intermediateand Special Surveys are briefly introduced in the following 2.1.2 - 2.1.4. The surveys are carried out in accordance with the requirements specified in the Rules and Regulations of each IACS Member Society. 2.1.2 Special Survey The Special Surveyconcentrates on examination in association with thickness determination. The report of the thickness measurement is recommended to be retained on board. Protective coating conditionwill be recorded for particular attention during the survey cycle. From 1991 it is a requirement for new ships to apply a protective coatingto the structure in water ballast tankswhich form part of the hull boundary. 2.1.3 Annual Survey At Annual Surveys,overall survey is required. For saltwater ballast tanks, examination may be required as a consequence of the Intermediate or Special Surveys. INTERNATIONALASSOCIATIONOFCLASSIFICATIONSOCIETIES 2 CLASS SURVEY REQUIREMENTS 3