K-09-/7 8314-87 48.5190300617029 ISO INTERNATIONAL STANDARD 8314 First edition 1987-03-15 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION Shipbuilding and marine structures -- Trunnion pieces for span bearings and lead block bearings Construction navale et structures maritimes - Marionnettes pour supports d'apiquage et supportsdepouliederetour ISO 8314: 1987 (E) 4851903 0061703 0 8314-87 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 committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with Iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with IsO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 8314 was prepared by Technical Committee ISO/TC 8, Shipbuilding and marine structures. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. International Organization for Standardization, 1987 Printed in Switzerland 4851903 0061704 8314-87 INTERNATIONALSTANDARD ISO8314:1987(E) Shipbuilding and marine structures -- Trunnion pieces for span bearings and lead block bearings 1 Scope and field of application type B: with a centrally-located eye; This International Standard specifies dimensions and materials type C: with two eyes, one upper and one lower. for trunnion pieces and locating bolts for assemblies of span bearings and cargo runner lead block bearings used in 4.2 Nominal size operating ship derrick booms. The nominal size designation of a trunnion piece is a numerical value without unit for reference and ordering purposes; it is derived from the permissible load at the eyes, in kilonewtons. 2 References Iso286/1,/so systemof limits andfits-Part1:Basis of 5Materials tolerances, deviations and fits.1) 5.1 Trunnion piece Iso630,Structuralsteels. The trunnion piece shall bemade of steel according to Iso 630, Iso 683/1, Heat-treatable steels, alloy steels and free-cutting grade Fe 360, as a minimum quality. steels-Part1:Directhardeningunalloyedandlowalloyed wroughtsteelinformofdifferentblackproducts. 5.2 Bolt or pin Iso 8147, Shipbuilding and marine structures - Derrick rigs and componentparts--Vocabulary.2) The bolt or pin shall be made of steel according to Iso 630, grade Fe 430, as a minimum quality. Definitions 5.3 Higher quality For the purposes of this International Standard, the definitions If the use of heat-treated quenched steel is required,then the given in Is0 8147 apply. material shall comply with iso 683/1. 4 Classification 6 Dimensions The dimensions of the trunnion piece shall be in accordance 4.1 Types with figures 1 and 2 and tables 1 and 2. Trunnion pieces are divided into the following three types: NOTE - The values for dimensions b, dg, ds, de, rg, r2 and rs are in accordance with Iso 6043, Shipbuilding and marine structures-Eye type A: with a single lower eye; andforkassembliesundertensionload-Maindimensions. 1) At present at the stage of draft. (Revision, in part, of ISO/R 286-1962.) 2) At present at the stage of draft proposal. vriaht Intemational Oroanizationfor Standardization