ISO INTERNATIONAL STANDARD 16249 First edition 2013-04-01 Springs Symbols RessortsSymboles Reference number ISO 16249:2013(E) ISO @IS02013 No reproduction or networking permitted without license from IHS Not for Resale IS0 16249:2013(E) COPYRIGHTPROTECTEDDOCUMENT @IS02013 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax +41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ IS0 2013 - All rights reserved No reproduction or networking permited without license from IHS Not for Resale IS0 16249:2013(E) Contents Page Foreword ..iv Introduction ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions 4 Composition of spring symbols ..1 4.1 General. .1 4.2 Basic characters .2. 4.3 Subscripts. ..2 5 Creation of new spring symbols .3 5.1 General. .3 5.2 Latin letters and Greek letters for basic characters .3 5.3 Upper case letters and lower case letters for basic characters .3 5.4 Latin letters and Greek letters for subscripts. 3 5.5 Upper case letters and lower case letters for subscripts 3 6 Basic character and subscript components of spring symbols .3 6.1 Basic character components. .3 6.2 Subscript components. ..4 7 Application symbols for helical compression springs ..5 8 Application symbols for helical extension springs .9 9 Application symbols for helical torsion springs ..10 10 Application symbols for flat springs ..14 11 Application symbols for leaf springs ..15 Annex A (normative) List of interim symbols ..17 Annex B (informative) Index of application symbols ..18 Bibliography .21 ii thout license from IHS Not for Resale