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    BS EN 12248-1999 Sawn timber used in industrial packaging - Permitted deviations and preferential sizes《工业包装用的锯材 允许偏差和最佳尺寸》.pdf

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    BS EN 12248-1999 Sawn timber used in industrial packaging - Permitted deviations and preferential sizes《工业包装用的锯材 允许偏差和最佳尺寸》.pdf

    1、BRITISH STANDARD BS EN 12248:1999 Sawn timber used in industrial packaging Permitted deviations and preferential sizes The European Standard EN 12248:1999 has the status of a British Standard ICS 55.160BSEN 12248:1999 This British Standard, having been prepared under the directionof the Sector Commi

    2、tteefor Building and CivilEngineering, was publishedunderthe authority ofthe Standards Committee andcomesinto effect on 15October1999 BSI 02-2000 ISBN 0 580 32671 3 National foreword This British Standard is the English language version of EN 12248:1999. The UK participation in its preparation was e

    3、ntrusted by Technical Committee B/543, Round and sawn timber, to Subcommitte B/543/3, Timber in pallets and packaging, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, an

    4、d keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or Europ

    5、ean publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the neces

    6、sary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN

    7、title page, pages 2 to 4 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN 12248:1999 BSI 02-2000 i Co

    8、ntents Page National foreword Inside front cover Foreword 2 Text of EN 12248 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN12248 June1999 ICS55.040; 79.040 English version Sawn timber used in industrial packaging Permitted deviations and preferential sizes Bois scis utiliss dans lemba

    9、llage industriel Ecarts admissibles et dimensions prfrentielles Schnittholz in Industriepackmitteln Zulssige Abweichungen und Vorzugsmae This European Standard was approved by CEN on 2 May 1999. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions

    10、for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three offici

    11、al versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Be

    12、lgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secreta

    13、riat: rue de Stassart 36, B-1050 Brussels 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12248:1999 EEN12248:1999 2 BSI 02-2000 Foreword This European Standard has been prepared by Technical Committee CEN/TC 175, Round and sa

    14、wn timber, the Secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 1999, and conflicting national standards shall be withdrawn at the latest by December

    15、 1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norwa

    16、y, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 Introduction 3 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Measurement 3 5 Changes in size due to changes in moisture content 4 6 Permitted deviations 4 7 Preferential sizes 4 7.1 General 4 7.2 Preferen

    17、tial sizes 4 Table 1 Dimensions and their permitted deviations 4 Table 2 Preferential sizes 4EN12248:1999 BSI 02-2000 3 Introduction This standard specifies permitted deviations and preferential sizes for sawn timber used in industrial packaging. A range of cross-sections likely to be readily availa

    18、ble is given to assist both producers and users. Preferential sizes are recommended for the manufacture of industrial packaging. They are considered as basic sizes at a moisture content of20%. The standard also stipulates the use of electric moisture meters for the measurement of moisture content. T

    19、his reference moisture content of 20 % does not prevent manufacturers from manufacturing industrial packaging with either dry or green timber. 1 Scope This standard specifies permitted deviations (due to variability in sawing and processing) from target thicknesses and widths for sawn timber used in

    20、 industrial packaging when measured at a defined reference moisture content. It also gives preferential sizes of this timber. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appr

    21、opriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publi

    22、cation referred to applies. EN 336, Structural timber Coniferous and poplar Sizes, permissible deviations. EN 844-4:1997, Round and sawn timber Terminology Part 4: Terms relating to moisture content. EN 844-6:1997, Round and sawn timber Terminology Part 6: Terms relating to dimensions of sawn timber

    23、. EN 1309-1, Round and sawn timber Method of measurement of dimensions Part 1: Sawn timber. prEN 13183-1, Round and sawn timber Method of measurement of moisture content Part 1: Method for determining moisture content of a piece of sawn timber (Oven-dry method). prEN 13183-2, Round and sawn timber M

    24、ethod of measurement of moisture content Part 2: Method for estimating moisture content of a piece of sawn timber (Electrical method). 3 Definitions For the purposes of this standard, the following definitions apply. 3.1 actual size size of a piece of sawn timber at the time of measurement EN 844-6:

    25、1997 3.2 moisture content mass of moisture in wood expressed as a percentage of its oven-dry mass EN 844-4:1997 3.3 moisture content size deviation difference between an actual size and the corresponding basic size, making allowance for the difference in size due to difference in moisture content ac

    26、cording to this standard 3.4 permitted dimensional deviations the permissible variation of the actual size (length, width and/or thickness) from the referenced basic size resulting from sawing or processing 3.5 Target size, basic size For the purposes of this standard, basic size and target size are

    27、 the same. 3.5.1 target size size desired after a particular production process (at a specified moisture content) to which the permitted deviations are related EN 844-6:1997 3.5.2 basic size size by which sawn timber is known or specified at a stated moisture content EN 844-6:1997 4 Measurement The

    28、measurement of the moisture content shall becarried out according to prEN 13183-1 or prEN13183-2. The reference moisture content for measurement is20 %.EN12248:1999 4 BSI 02-2000 5 Changes in size due to changes in moisture content Unless there is evidence to the contrary, it shall be assumed that t

    29、he thickness and width of a piece oftimber increase by 0,25 % for every 1 % of moisture content from 20 % up to 30 %, and decrease by 0,25% for every 1 % of moisture content below20%. The above values are typical, regardless of the species. 6 Permitted deviations The permitted deviations on thicknes

    30、ses and widths at 20 % moisture content are specified in Table 1. Table 1 Dimensions and their permitted deviations 7 Preferential sizes 7.1 General The sizes are measured according to EN 1309-1. 7.2 Preferential sizes Preferential sizes are given in Table 2. Table 2 Preferential sizes Dimensions mm

    31、 Permitted deviations Thickness and/or width k 100 +3 1 Thickness and/or width 100 +4 2 Component length +1 3 NOTE 1These permitted deviations are in accordance with class 1 of EN 336. NOTE 2More restrictive permitted deviations can be specified in contracts if necessary. Basic cross-sections Thickn

    32、esses mm Widths mm 75 100 125 150 175 200 225 250 300 16 x x 18 x x x x 22 x x x x x 25 x x x x x x 32 x x x x 38 x x x x x x x x x 50 x x x x x x x x x 63 x x x x x x x 75 x x x x x x x x x 100 x x x x x x x NOTEOther dimensions can also be used in national rules.blankBS EN 12248:1999 BSI 389 Chisw

    33、ick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions BritishStandards are updated by am

    34、endment or revision. Users of BritishStandards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this BritishStandard w

    35、ould inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel:02089969000. Fax:02089967400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of

    36、standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel:02089969001. Fax:02089967001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been pu

    37、blished as BritishStandards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available

    38、 which give details on all its products and services. Contact the Information Centre. Tel:02089967111. Fax:02089967048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other bene

    39、fits contact Membership Administration. Tel:02089967002. Fax:02089967001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1

    40、988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details

    41、such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel:02089967070.


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