ISO INTERNATIONAL STANDARD 5456-2 First edition 1996-06-15 Technical drawings ---- Projection methods - Part 2: Orthographic representations Dessins techniques -Méthodes de projection- Partie 2: Représentations orthographiques OSI Reference number ISO 5456-2:1996(E) ISO 5456-2:1996(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 committees. Each member body interested in a subject for which a technical committee has been established has the right to be rep- resented on that committee. Internationai organizations, governmental and non-governmental, in 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 5456-2 was prepared by Technical Committee ISo/Tc 10, Technical drawings, product definition and related documen- tation, Subcommittee SC 1, Basic conventions. isO 5456 consists of the following parts, under the general title Technical drawings -- Projection methods: Part 1: Synopsis Part 2: Orthographic representations Part 3:Axonometricrepresentations Part 4:Centralprojection Annex A forms an integral part of this part of ISO 5456. @ISO1996 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from thepublisher. International Organization for Standardization Casepostale56.CH-1211Geneve20·Switzerland Printed inSwitzerland ii @ISO ISO 5456-2:1996(E) Introduction Orthographic representation in its various forms is the most widely used (mechanical, electrical, construction, etc.), and is thus considered to be the accepted technical language. ii