ISO INTERNATIONAL STANDARD 8904 First edition 1990-12-01 Broadleaved sawn timber -- Sizes --- Methods of measurement Sciages de bois feuillus -Dimensions --Methodes de mesurage Referencenumber 1SO 8904:1990(E) No reproduction or networking permited without license from IHS Not for Resale ISO 8904:1990(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 represented on that committee. International organizations, govern- 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 Inter- national Standard requires approvai by at least 75 % of the member bodies casting a vote International Standard iso 8904 was prepared by Technical Committee ISO/TC55,Sawntimberandsawlogs. CisO1990 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 inwriting fromthepublisher. International Organization for Standardization Case Postale 56·CH-1211 Geneve 20· Switzerland Printed in Switzerland No reproduction or networking permitted without license from IHS Not fr Resale INTERNATIONALSTANDARD ISO 8904:1990(E) Broadleaved sawn timber - Sizes -- Methods of measurement Scope 4.2 The width of sawn timber shall be measured asfollows: This International Standard specifies the methods ofmeasurementofthelength,width,thicknessand a) for square-edged sawn timber with parallel volumeofbroadleavedsawntimber. edges: at any place along the length of sawn timber where there is no wane, but not less than It is applicable to unplaned, square-edged and un. 150 mm from one of the ends; edged broadleaved sawn timber. b) for square-edged sawn timber with tapered Normative reference edges: at the mid-length of the face of sawn tim- 2 ber and at a place where there is no wane: The following standard contains provisions which, c) for unedged sawn timber: on both faces, in the through reference in this text, constitute provisions middle of the sawn timber length; the width shall of this International Standard. At the time of publi- cation, the edition indicated was valid.All standards bedeterminedastheaverageofthewidthsof both faces.The bark shall be disregarded when are subject to revision, and parties to agreements measuring the width; based on this International Standard are encour- aged to investigate the possibility of applying the d) for unedged sawn timber of thickness less than mostrecenteditionofthestandardindicatedbelow 4omm:alongthenarrowerofthetwofacesin MembersofIECandlsOmaintainregistersofcur- rently valid International Standards. the middle of the sawn timber length. Quantities shall be rounded off to the nearest mul- iso 1032:1974,Coniferous sawn timber--. Sizes tiple of 10 mm. Terms and definitions. 4.3 The thickness of sawn timber may be meas- 3 Definitions ured at any place along the length of the sawn tim- ber, but not iess than 150 mm from one of the ends. For the purposes of this International Standard, the definitionsgiven in IsO1032apply. 4.4 The volume of each piece of sawn timber shall be calcuiated as the product of the nominal thick- 4 Methods of measurement ness, nominal width and nominal length of the sawn timber, expressed in the same units of measure- 4.1 The length of sawn timber shall be measured ment. as the minimum distance between its ends,which (conventionally) perpendicularly to the 4.5 The volume of a lot of sawn timber shall be longitudinal axis of the sawn timber. calculated to thenear