ISO/TR TECHNICAL REPORT 18228-3 First edition 2021-06 Design using geosynthetics - Part 3: Filtration Design pour géosynthétiques - Partie 3: Filtration Reference number IS0/TR18228-3:2021(E) ISO Copyright International Organization for Standardization @ISO2021 IS0/TR 18228-3:2021(E) COPYRIGHTPROTECTEDDOCUMENT IS02021 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 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: +41 22 749 01 11 Email: copyright@iso.org Website: www.iso.org Published in Switzerland Copyigh ileratinal Organization for Standardization @ IS0 2021 - All rights reserved