ISO INTERNATIONAL 9404-1 STANDARD First edition 1991-09-01 Enclosures for protection against ionizing radiation --- Lead shielding units for 150 mm, 200 mm and 250 mm thick walls - Part 1 : Chevron units of 150 mm and 200 mm thickness Enceintes pour la protection contre les rayonnements ionisants -- Elementsde Partie 1 : Elements a chevrons de 150 mm et 200 mm d'epaisseur Reference number ISO 9404-1 : 1991 (E) Copyriahtintemational Organizatin for Standardizatin d by IHS unde Noreproo Not for Resale networking permitted without license from IHS ISO 9404-1 : 1991 (E) Contents Page Section 1 : General 1.1 Scope 1 1.2 Classification 1 1.3 Designation 1.3.1Explanation of the reference number . 2 1.3.2 Explanation of a designation example 2 2 1.4Specifications of the bricks 2 1.4.1 General 1.4.2 Property of the material . 3 1.4.3 Profile of the chevron. 3 Section 2 : Lead shielding units -- Thickness 150 mm 2.1 Categories 1 and2 . 5 2.1.1 Plain bricks 5 2.1.2 Corner bricks 6 7 2.1.3 End bricks 7 2.1.4 Special bricks Posts 8 2.1.5 2.1.6Assembly of basic units . 8 10 2.1.7 Aperture bricks @ISO1991 All rights reserved. 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 the publisher. International Organization for Standardization Case postale 56 . CH-1211 Geneve 20 . Switzerland Printed in Switzerland Copyright International Organization for Standardization No r vithout license from IHS Not for Resal ISO 9404-1 : 1991 (E) 2.1.8 Windows . 12 2.1.9 Sphere units . 17 2.1.10Plugs 18 2.1.11 Reducing units 19 2.1.12 Assembly of functional units 20 2.2 Category3 23 2.2.1 Plain bricks 23 2.2.2 Corner bricks. 23 Section 3 : Lead shielding units -- Thickness 200 mm 3.1 Categories 1 and2 . 24 Basic units and assembly of walls for enclosures of 200 mm thickness . . 3.1.1 24 24 3.1.2 Posts 3.1.3 Aperture bricks 26 3.1.4 Windows 29 3.1.5 Sphere units 3.1.6 35 Plugs 3.1.7 Reducing units 36 3.1.8 Assembly of functional units 38 Section 4 : Tolerances 4.1 Tolerances 41 Annex A Bibliography 44 ili Copyright International Organization for Standardization Not for Resale No r e from IHS