H-l 4851903 0033985 6 2-T2hh (ISO 4471 International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEXAYHAPOAHAA OPFAHW3ALWA HIO CTAHAAPTW3AUWM-ORGANISATION INTERNATIONALE DE NORMALISATION Wood - Sampling sample trees and logs for determination of physical and mechanical properties of wood in homogeneous stands Bois -- Prelevement d'arbres échantllons et de billes pour la determination des proprietés physiques et mecaniques du bois des peuplements homogenes First edition - 1982-05-01 UDC 674.03 : 620.11 Ref. No. ISO 4471-1982 (E) SO 4471-1982 Descriptors : wood, trees (plants), sampling, test specimen conditioning, field tests. Price based on 7 pages Copyright International Organization for Standardization Not forRes EO6TSAh 2-T2ht 96EE0 0 Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards institutes (isO member bodies). The work of developing Inter national Standards is carried out through ISO technical committees. Every member body interested in a subject for which a technical committee has been set up has the and non-governmental, in liaison with Iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IO Council. International Standard ISO 4471 was developed by Technical Commitee ISO/TC 55, Sawn timber and sawlogs, and was circulated to the member bodies in May 1980. It has been approved by the member bodies of the following countries : Australia Ghana Romania Hungary Austria South Africa, Rep. of Belgium India Sweden Bulgaria Turkey Italy Canada Korea, Dem. P. Rep. USSR Czechoslovakia Mexico Yugosiavia Norway Finland France Poiand The member bodies of the following countries expressed disapproval of the document on technical grounds : Ireland New Zealand @ International Organization for Standardization, 1982 · Printed in Switzerland without license from IHS 29-T2hh LR6EEO0 EO6TSEh ISO 4471-1982 (E) INTERNATIONAL STANDARD Wood - Sampling sample trees and logs for determination of physical and mechanical properties of wood in homogeneous stands Scope and field of application 3.8 form ratio : The relation between the diameter at a 1 height of 1,3 m from the root coilar and the diameters in the This International Standard specifies the method of selecting root collar, at a height of 1/4, 1/2, and 3/4 of the total height of sample trees and logs in test areas of homogeneous stands for the stem. determination of physical and mechanical properties of wood Selection of test area Reference 2 4.1 The test area shall be selected according to national ISO3129, Wood Sampling methods and general re- forest regulation instructions and normative documents. It shall quirements for physical and mechanical tests. be carried out on a forest plot with most typical taxation characteristics for the stand under study. 3 Definitions 4.2 The test area shall contain not fewer than 100 trees of each generation of the species to be examined, the diameter of 3.1 homogeneous stand : A plot of forest which is the trees at a height of 1,3 m from the root collar being at least 14 cm. live overground cover and which differs from the neighbouring plots in these characteristics. 4.3 The description of the test area shall be made in accor. dance with the form shown in annex A. Its characteristics shall 3.2' homogeneous forest : A total combination of trees, be determined in compliance with national forest regulation in- growing in the same portion of forest, distinguished by their structions. thickness and height, the values of which do not ex- ± 30 % and ± 10 %, respectively, of the mean ceed 4.4The trees in the test area shall be inventoried separately values. by species and age generations in accordance with national forest regulation instructions. The results of the inventory shall 3.3 generation age : An interval of time measured in