ISO INTERNATIONAL STANDARD 24508 First edition 2019-03 Ergonomics Accessible design Guidelines for designing tactile symbols and characters Ergonomie-Conception accessibleLignes directrices pour la conception des symboles et caracteres tactiles Reference number IS0 24508:2019(E) so @ IS0 2019 IS0 24508:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO 2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0 24508:2019(E) Contents Page Foreword ..iv Introduction ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions ..1 4 Design guidelines for tactile symbols and characters .3 4.1 Selection of tactile symbols .3 4.2 Selection oftactile characters .3 4.3 Size of tactile patterns. 4 4.4 Linewidth of tactile patterns 4 4.5 Height of tactile patterns above the base plane 4 4.6 Cross-sectional figurations of tactile lines and filled symbols .5 4.7 Others. .5 5 Other factors to consider .5 5.1 General .5 5.2 Information associated with tactile symbols and characters ..5 5.3 Easy to find and touch .6 5.4 Materials on which tactile symbols and characters are mounted .6 Annex A (informative) Examples of tactile symbols and their meanings .7 Annex B (informative) Legibility data of tactile symbols and characters for young people, older people and blind people .8 Annex C (informative) Textual descriptions for figures used in this document. ..12 Bibliography .13 @ IS0 2019 - All rights reserved iii