DIN EN 1058-2010 Wood-based panels - Determination of characteristic 5-percentile values and characteristic mean values German version EN 1058 2009《木基板材 特征5-百分位数值和特征均值的测定》.pdf

《DIN EN 1058-2010 Wood-based panels - Determination of characteristic 5-percentile values and characteristic mean values German version EN 1058 2009《木基板材 特征5-百分位数值和特征均值的测定》.pdf》由会员分享，可在线阅读，更多相关《DIN EN 1058-2010 Wood-based panels - Determination of characteristic 5-percentile values and characteristic mean values German version EN 1058 2009《木基板材 特征5-百分位数值和特征均值的测定》.pdf（19页珍藏版）》请在麦多课文档分享上搜索。

1、April 2010 Translation by DIN-Sprachendienst.English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS

2、79.060.01!$aU3“1625016www.din.deDDIN EN 1058Wood-based panels Determination of characteristic 5-percentile values and characteristicmean valuesEnglish translation of DIN EN 1058:2010-04Holzwerkstoffe Bestimmung der charakteristischen 5-%-Quantilwerte und der charakteristischenMittelwerteEnglische be

3、rsetzung von DIN EN 1058:2010-04Panneaux base de bois Dtermination des valeurs caractristiques correspondant au fractile 5 % dexclusion etdes valeurs caractristiques moyennesTraduction anglaise de DIN EN 1058:2010-04supersedesDIN EN 1058:1996-04www.beuth.deIn case of doubt, the German-language origi

4、nal shall be considered authoritative.Document comprises 19 pagesDIN EN 14358:2007-03,Together with 04.10 DIN EN 1058:2010-04 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 112 “Wood-based panels” (Secretariat: DIN, Germany).

5、The responsible German body involved in its preparation was the Normenausschuss Holzwirtschaft und Mbel (Timber and Furniture Standards Committee), Working Committee NA 042-02-15 AA Spiegelaus-schuss zu CEN/TC 112 und ISO/TC 89 Holzwerkstoffe. Amendments This standard differs from DIN EN 1058:1996-0

6、4 as follows: a) For the determination of strength and stiffness properties for log-normal distributed test data reference is made to EN 14358. b) The calculation of the 5-percentile characteristic value of strength and stiffness properties for log-normal distributed test data according to EN 14358

7、is described in Annex A and is explained by examples. c) The calculation of the characteristic mean value (50-percentile value) of stiffness properties and physical properties (e.g. density, moisture content) for normal distributed test data is described in Annex B and is explained by examples. Prev

8、ious editions DIN EN 1058: 1996-04 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1058 November 2009 ICS 79.060.01 Supersedes EN 1058:1995English Version Wood-based panels - Determination of characteristic 5-percentile values and characteristic mean values Panneaux base de bois - Dtermination

9、des valeurs caractristiques correspondant au fractile 5 % dexclusion et des valeurs caractristiques moyennes Holzwerkstoffe - Bestimmung der charakteristischen 5-%-This European Standard was approved by CEN on 3 October 2009. CEN members are bound to comply with the CEN/CENELEC Internal Regulations

10、which stipulate the conditions 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 CEN Management Centre or to any CEN member. This Europea

11、n Standard exists in three official 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 CEN Management Centre has the same status as the official versions. CEN members are the natio

12、nal standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and U

13、nited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1058:2009

14、: EQuantilwerte und der charakteristischen Mittelwerte EN 1058:2009 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Symbols 55 Reference population 56 Determination of characteristic values of mechanical and physical properties .56.1 Sampling .56.2 Testing

15、66.3 Analysis of data .66.3.1 General 66.3.2 Strength and stiffness properties 66.3.3 Characteristic mean value (50-percentile characteristic value) 67 Test report 6Annex A (informative) Calculation of the 5-percentile characteristic value of log-normal distributed test data according to EN 14358 .7

16、A.1 Symbols 7A.1.1 Letter symbols .7A.1.2 Indices .7A.2 Analysis of data .8A.2.1 Characteristic value km of test data with unknown coefficient of variation 8A.2.2 Characteristic value km of test data with known coefficient of variation .8A.3 Acceptance criteria for a sample .9A.4 Examples of calcula

17、tion 9A.4.1 Determination of the characteristic value of the modulus of bending 05f of particle boards with unknown coefficient of variation: .9A.4.2 Determination of the characteristic value of the modulus of bending 05f of particle boards with known coefficient of variation: 11Annex B (normative)

18、Calculation of the characteristic mean value (50-percentile value) of normal distributed test data 13B.1 Symbols . 13B.1.1 Letter symbols (see appendix A) 13B.1.2 Indices (see also appendix A) . 13B.2 Analysis of data 13B.2.1 50-percentile characteristic values (characteristic mean values) . 13B.3 A

19、cceptance criteria for a sample 14B.4 Examples of calculation . 14B.4.1 Determination of the lower 50-percentile characteristic value (lower characteristic mean value) of the modulus of elasticity %50ELparallel to the production line of OSB of a normal distributed sample with unknown coefficient of

20、variation. . 14B.4.2 Determination of the upper 50-percentile characteristic value (upper characteristic mean value) of the density 50Uof a normal distributed sample of particle boards with known coefficient of variation . 16Bibliography . 17DIN EN 1058:2010-04 EN 1058:2009 (E) 3 Foreword This docum

21、ent (EN 1058:2009) has been prepared by Technical Committee CEN/TC 112 “Wood-based panels”, the secretariat of which is held by DIN. 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 May 2010, and c

22、onflicting national standards shall be withdrawn at the latest by May 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This docum

23、ent has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EC Directive(s). This document supersedes EN 1058:1995, the statistical evaluation of which had to be corrected. The statistical evaluation fo

24、llows the principles of Annex D of EN 1990:2002, of EN 1995-1-1:1993, Eurocode 5: Design of timber structures Part 1-1: General Common rules and rules for buildings, and of EN 14358:2006, Timber structures Calculation of characteristic 5-percentile values and acceptance criteria for a sample. Compar

25、ed to EN 1058:1995 the following modifications have been made: a) For the determination of strength and stiffness properties for log-normal distributed test data reference is made to EN 14358; b) The calculation of the 5-percentile characteristic value of log-normal distributed test data according t

26、o EN 14358 is described in Annex A and is explained by examples; c) The calculation of the characteristic mean value (50-percentile value) of normal distributed test data is described in Annex B and is explained by examples. According to the CEN/CENELEC Internal Regulations, the national standards o

27、rganizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal

28、, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 1058:2010-04 EN 1058:2009 (E) 4 1 Scope On the basis of test results from wood-based panel products for structural purposes, this European Standard specifies a method for the determination of: characteristic 5-p

29、ercentile values of mechanical properties under the assumption of a log-normal distribution of the test data according to EN 14358; and characteristic mean values (50-percentile values) of physical properties under the assumption of a normal distribution of the test data. Test data should be determi

30、ned from tests using the test methods outlined in EN 789. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (inc

31、luding any amendments) applies. EN 326-1, Wood-based panels Sampling, cutting and inspection Part 1: Sampling and cutting of test pieces and expression of test results EN 789, Timber structures Test methods Determination of mechanical properties of wood based panels EN 14358, Timber structures Calcu

32、lation of characteristic 5-percentile values and acceptance criteria for a sample 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 characteristic value value of a material property which is defined as a fractile of the distribution of that pro

33、perty within the total population of that material NOTE For all strength properties, this fractile is the fifth percentile. For stiffness properties as well as physical properties, two different characteristic values can be used: the fifth percentile and the mean value. 3.2 panel piece of wood-based

34、 sheet material large enough to permit the cutting of test pieces 3.3 reference population wood-based panels for which the characteristic values are relevant 3.4 production site any single production line DIN EN 1058:2010-04 EN 1058:2009 (E) 5 3.5 sample number of panels of one population NOTE Unles

35、s otherwise agreed, the panels of the sample are drawn at random. 3.6 shift continuous period of production by the same group of workers NOTE Normally 8 h. 3.7 test piece piece of panel cut to the size required for testing a specific property 4 Symbols L Lower specification limit 05x Characteristic

36、value of a log-normal distributed property 50x Characteristic mean value of a normal distributed property U Upper specification limit xln Coefficient of variation of a log-normal distributed sample x Coefficient of variation of a normal distributed sample 5 Reference population The reference populat

37、ion is in accordance with EN 326-1 defined by parameters such as type and manufacturing process, thickness range, grade, lay-up and quality classification of wood-based panels and is consistent with the material that is or can be supplied commercially and is capable of being identified at all stages

38、 of production, supply and in service. 6 Determination of characteristic values of mechanical and physical properties 6.1 Sampling A total of at least 32 panels of the same type, grade, thickness range and/or lay-up shall be sampled at random from the production sites. Where there are fewer than 32

39、shifts, the total number of panels shall be obtained by taking a maximum of four panels from each shift at each production site. Sampling of test pieces from panels shall be in accordance with the procedures given in EN 789. DIN EN 1058:2010-04 EN 1058:2009 (E) 6 6.2 Testing Testing shall be carried

40、 out in accordance with either EN 789 (for strength and stiffness properties) or EN 326-1 (for physical properties). 6.3 Analysis of data 6.3.1 General According to the distribution of the test data, the characteristic values shall be calculated either on the basis of log-normal distribution (in cas

41、e of strength properties) or normal distribution (in case of physical properties and modulus of elasticity). If exceptionally, the number of panels is less than 32, the reasons for that have to be declared specifically in the test report. 6.3.2 Strength and stiffness properties The procedure of calc

42、ulating the characteristic value 05x of log-normal distributed test data with known or unknown coefficient of variation xln according to EN 14358 is given in Annex A. 6.3.3 Characteristic mean value (50-percentile characteristic value) The procedure of calculating the estimates of the characteristic

43、 mean value 50xLand 50xU, respectively, of normal distributed test data with known or unknown coefficient of variation x is given in Annex B. 7 Test report The test report shall contain the following statements: a) date and place of sampling; b) product type sampled; c) number of panels sampled and

44、their dates of production; d) method of sampling and calculation; e) test results of 6.3.2 or 6.3.3, respectively. DIN EN 1058:2010-04 EN 1058:2009 (E) 7 Annex A (informative) Calculation of the 5-percentile characteristic value of log-normal distributed test data according to EN 14358 A.1 Symbols A

45、.1.1 Letter symbols f Strength property, in newtons per square millimetre (N/mm) k Statistical factor )(nk Statistical factor for a population with known coefficient of variation L Lower specification limit km Characteristic value of log-normal distributed test data n Number of test results (panel m

46、eans) of the sample xslnStandard deviation between panel means of a log-normal distributed property jx jx Panel mean x Grand mean A.1.2 Indices jTest panel serial number ( nj 1= ) kCharacteristic value of a log-normal distributed property LRelated to lower specification limit sIndex of the statistic

47、al factor for a population with unknown coefficient of variance xlnRelated to log-normal distributed test data 055-percentile characteristic value of a log-normal distributed property DIN EN 1058:2010-04 EN 1058:2009 (E) 8 A.2 Analysis of data A.2.1 Characteristic value km of test data with unknown

48、coefficient of variation The characteristic value km of a log-normal distributed property is in accordance with EN 14358 defined as: =njjxsjkskxnxm1ln05)ln1exp( (A.1) where: 1lnlnln1)ln1(ln1112121ln=nnxxxnxnxsnjjnjjjnjjjjnjjnjjjjx(A.2) For sk values see Table A.1. Table A.1 Factor sk values for test

49、 data, the coefficient of variation is unknown Number of test data n 5 10 15 20 30 32 40 50 100 sk value 2,46 2,10 1,99 1,93 1,87 1,86 1,83 1,81 1,75 A.2.2 Characteristic value km of test data with known coefficient of variation If the coefficient of variation xvlnis known from prior knowledge, e.g. from production control of a period of one year or more, the factor )(nk shall be taken as sk in Equation (A.1). If the known coef