ISO INTERNATIONAL STANDARD 5778 Second edition 1998-08-15 Ships and marine technology Small weathertight steel hatches Navires et technologie maritime - Petits panneaux en acier, étanches aux intemperies ISO Reference number ISO 5778:1998(E) ISO 5778:1998(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through isO technical liaison with isO, also take part in the work. isO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 5778 was prepared by Technical Committee ISO/TC 8, Ships and marine technology Subcommittee SC 8, Structures. This second edition cancels and replaces the first edition (isO 5778:1979), of which it constitutes a technical revision. Amendments The following amendments have been made to the first edition (1979-12-15) a) The nominal size 830 × 630 has been added. C) The tolerances for a, b, a, and b, have been added in tables 2 and 3. The text of 3.4.2 has been supplemented. e) The distance between the hinge's pivot and the coaming has been changed from 55 mm to 60 mm. f) The minimum tensile strength of the steel for coamings, cover plates, hinges, etc. has been changed to 340 N/mm². g) The designation has been added. h) The standard has been editorially revised. @ISO1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduceo or utilized in any form or by any means, electronic or mechanical, including photocopying and microtilm,withoutpermissioninwritingfromthepublisher nternational Organizationfor Standardization Casepostale56·CH-1211Geneve20·Switzerland nternet [email protected] Printed in Switzerland ii ISO 5778:1998(E) INTERNATIONALSTANDARD @ISO Ships and marine technology Small weathertight steel hatches 1 Scope This International Standard specifies the main dimensions, location and number of fittings, materials and quality of manufacture for small weathertight steel hatches for application on board ships in order to ensure interchangeability of the hatches. The remaining dimensions are left to the manufacturer. The hatches are suitable for loading operations and for giving access to storage compartments and dry cargo holds The hatches are not suitable as an access to any kind of tanks and shall not be used as escape hatches. These hatches generally conform to the requirements of the International Convention on Load Lines 1966 (LLC66) The possibility for application in position 1 and position 2 has to be considered for each situation and, where necessary, the hatch covers shall be provided with additional stiffening. NOTE- Users of this International Standard should note thatwhile observing the requirements of this standard,they should individual ship concerned. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IsO 262:—1), ISO general-purpose metric screw threads -Selected sizes for screws, bolts and nuts. 1) To be published. (Revision of ISO 262:1973)