EN 1533-2010 en Wood flooring - Determination of bending strength under static load - Test methods《木地板 静负荷下弯曲强度的测定》.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 1533:2010Wood flooring Determination of bendingstrength under static load Test methodsBS EN 1533:2010 BRITISH STANDARDNational forewordThis British Standard is the UK imple

2、mentation of EN 1533:2010. Itsupersedes BS EN 1533:2000 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/543, Round and sawn timber.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does n

3、ot purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 64092 6ICS 79.080Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theSta

4、ndards Policy and Strategy Committee on 31 August 2010.Amendments issued since publicationDate Text affectedBS EN 1533:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1533 August 2010 ICS 79.080 English Version Wood flooring - Determination of bending strength under static load - Test metho

5、ds Planchers en bois - Dtermination de la flexion sous charge statique - Mthodes dessai Holzfubden - Bestimmung der Biegefestigkeit unter statischer Beanspruchung - Prfmethoden This European Standard was approved by CEN on 26 June 2010. CEN members are bound to comply with the CEN/CENELEC Internal R

6、egulations 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. T

7、his European 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 ar

8、e the national standards bodies of Austria, Belgium, Bulgaria, Croatia, 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, Swede

9、n, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. R

10、ef. No. EN 1533:2010: EBS EN 1533:2010EN 1533:2010 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Principle 54.1 General 54.2 Static line load 54.3 Static point load .55 Apparatus .55.1 Measuring instrument for dimensions and deflection .55.2 Loading equip

11、ment 55.2.1 Accuracy .55.2.2 Static line load 55.2.3 Static load .55.3 Support .76 Test assembly 86.1 Preparation of a test assembly .86.1.1 General 86.1.2 Wood flooring of which the ends of the elements are supported by the battens 106.1.3 Wood flooring of which the ends of the elements are not sup

12、ported by the battens . 106.2 Sampling 106.3 Conditioning 107 Procedure 107.1 General . 107.2 Placing of the test assembly . 117.2.1 General . 117.2.2 Static line load . 117.2.3 Static point load 117.3 Determination of the maximum load for the test assembly . 118 Expression of the results for a samp

13、le 118.1 Common statistical methods . 118.1.1 Mean value . 118.1.2 Standard deviation 118.1.3 Characteristic values 128.2 Final results . 149 Test report . 14Bibliography . 15BS EN 1533:2010EN 1533:2010 (E) 3 Foreword This document (EN 1533:2010) has been prepared by Technical Committee CEN/TC 175 “

14、Round and sawn 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 February 2011, and conflicting national standards shall be withdrawn at the lates

15、t by February 2011. 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 document supersedes EN 1533:2000. Compared with EN 1533:2000,

16、 the following modifications have been made: a) modification of accuracy in 5.1; b) modification of loading equipment for static load (5.2.3); c) modification and improvement of Figures 1, 2 and 3; d) simplification and new presentation of Clause 6 regarding test assembly; e) simplification and new

17、presentation of Clause 7 regarding procedure; f) simplification and new presentation of Clause 8 regarding expression of results. This standard is one of a series of standards concerning wood flooring and wood panelling and cladding. According to the CEN/CENELEC Internal Regulations, the national st

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

19、, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN 1533:2010EN 1533:2010 (E) 4 1 Scope This European Standard specifies methods of determining the bending strength of wood flooring under static load: a method with a static line load and a method wit

20、h a static point load. The methods apply to wood flooring installed on a non-continuous support and thus assuming static load-bearing conditions. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition c

21、ited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 13756:2002, Wood flooring Terminology 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13756:2002 and the following apply: 3.1 te

22、st assembly set of wood flooring elements assembled according to a defined type or to the instructions of the manufacturer, for the purpose of being tested 3.2 element smallest individual part (strip or board) of wood flooring 3.3 maximum load maximum force leading to the failure of the test assembl

23、y 3.4 bending strength result of various values of maximum load expressed as a mean value or a characteristic value, in newton 3.5 static line load bending force applied to the test assembly by means of a bar whose axis is parallel to the axis of the supports 3.6 static point load bending force appl

24、ied to the test assembly by means of a bar whose axis is perpendicular to the plane of the test assembly 3.7 span distance between the axes of supporting battens or joists BS EN 1533:2010EN 1533:2010 (E) 5 4 Principle 4.1 General The tests are carried out on a test assembly made up with several elem

25、ents jointed according to a defined type or in special applications to the manufacturers instructions. 4.2 Static line load The bending strength is determined by applying a static line load across the mid span of some test assemblies. 4.3 Static point load The bending strength is determined by the a

26、pplication of a static point load across the mid span of some test assemblies. 5 Apparatus 5.1 Measuring instrument for dimensions and deflection For the length of wood flooring elements and for the span, use a measuring instrument with a minimum accuracy of 1 mm. For the width and thickness of wood

27、 flooring elements and battens or joists, use a measuring instrument with a minimum accuracy of 0,5 mm. 5.2 Loading equipment 5.2.1 Accuracy It shall be able to measure the load to an accuracy of 1 %. 5.2.2 Static line load The load shall be applied by a steel loading head, with a contact surface ro

28、unded to a radius of (15 0,05) mm, whose length l exceeds the width of the test assembly (see Figure 1a). Its axis shall be parallel to the surface of the test assembly and perpendicular to the length of the elements making it up. 5.2.3 Static load The load shall be applied by a steel loading head w

29、ith a squared contact face of (50 x 50) mm; the edge of the contact surface shall be rounded or bevelled. Its axis shall be perpendicular to the face of the test assembly. (see Figure 1b). NOTE The loading head described above is according to EN 1991-1-1 where it is defined. BS EN 1533:2010EN 1533:2

30、010 (E) 6 Dimensions in millimetres a) Static line loading head b) Static point loading head Figure 1 Loading equipment BS EN 1533:2010EN 1533:2010 (E) 7 5.3 Support A flat rigid table with devices, adjustable in span, to fix the battens of the test assembly (see Figure 2). The support is stiff enou

31、gh if, under the load applied in the test, its deflection is less than 0,1 mm in the direction of the applied force. The clearance between the back of the test assembly and the support shall be consistent with the deflection under failure load. The thickness of the battens or joists shall be suitabl

32、e for that purpose. The length of the table shall be consistent with the length of the test assembly (about 1,50 m). The end-supports can be independent of the two supports of the central span, but they shall not move relative to the central supports. The load can be applied by movement of either th

33、e loading head or of the supporting table. BS EN 1533:2010EN 1533:2010 (E) 8 Dimensions in millimetres a) Movement by loading head Distance “x“ is determined by the manufacturer installation guideline. b) Movement by supporting table Key F force Figure 2 Support 6 Test assembly 6.1 Preparation of a

34、test assembly 6.1.1 General See Figure 3. BS EN 1533:2010EN 1533:2010 (E) 9 a) Section view b) Assembled elements Key l1width of element Figure 3 Preparation of a test assembly BS EN 1533:2010EN 1533:2010 (E) 10 A set of four elements shall be assembled as defined below: For special applications, mo

35、re elements can be added. The elements shall be fixed on the battens by nailing or according to the manufacturers instructions. The battens shall be made of timber with a density of at least 400 kg/m3. Their width shall be (45 1) mm, their depth shall be at least 45 mm and, if necessary, adjusted to

36、 the stroke of the loading head between the contact point on the test specimen and the failure point. NOTE When required as supports for a defined end-use, joists, instead of battens, can be used to make up the assembly. 6.1.2 Wood flooring of which the ends of the elements are supported by the batt

37、ens A set of four elements shall be assembled as defined bellow: One element on each side of two end-jointed elements, the end joint shall be roughly in line with the middle of one of the central batten. 6.1.3 Wood flooring of which the ends of the elements are not supported by the battens One eleme

38、nt on each side of the two end-jointed elements, the end joint shall be roughly distant of 3 cm from the middle of the span of the two central battens. NOTE The manufacturers instructions can specify the span and the type of fixing. 6.2 Sampling The samples, taken at random, shall be defined for a g

39、iven type of wood flooring as they are defined in the corresponding product standard. The samples can be coated or not. The number of elements necessary to make at least six assemblies shall be sampled to determine the bending strength. 6.3 Conditioning The test specimen shall be conditioned either

40、in: - climate A, defined by a relative humidity of (65 5) % and a temperature of (20 2)C, or - climate B, defined by a relative humidity of (50 5) % and a temperature of (23 2)C. 7 Procedure 7.1 General Measure the width and thickness of the elements with the apparatus as defined in 5.1. Check out t

41、he span and the width of the battens with the apparatus as defined in 5.1. BS EN 1533:2010EN 1533:2010 (E) 11 7.2 Placing of the test assembly 7.2.1 General Place the test assembly flat on the supporting table, the face facing the central loading head, with its longitudinal axis at right angles to t

42、hat of the supports with the centre point under the load. The battens shall be properly clamped in a fixed position relative to the support. 7.2.2 Static line load Adjust the loading head relative to the battens in the middle of the central span to 1 mm along the loading line (see Figure 1a). 7.2.3

43、Static point load The axis of the loading head shall be adjusted within 1 mm to the mid span and shall be adjusted within 1 mm to the mid width of the element to be loaded (see Figure 3). 7.3 Determination of the maximum load for the test assembly To determine the maximum load for the test assembly,

44、 apply a load, increasing at a rate to give a uniform movement of the loading head, until failure of the test assembly occurs. The rate shall also be such that failure occurs in (300 120) s. Record the maximum load Fmaxin newton to an accuracy of 1 % and the mode of failure of the test assembly. 8 E

45、xpression of the results for a sample 8.1 Common statistical methods 8.1.1 Mean value A normal distribution is assumed. nPmni1= where m is the mean value of the performance of the sample; Piis the performance of “i-th“ test assembly; n is the number of test assemblies in the sample. 8.1.2 Standard d

46、eviation 211)(12=nmPsniBS EN 1533:2010EN 1533:2010 (E) 12 where s is the standard deviation. All the other parameters are defined in 8.1.1. 8.1.3 Characteristic values Depending of the property, the characteristic values are either the 5th percentile or the 95th percentile of the assumed normal dist

47、ribution. A characteristic value is given by the following formula: ) x x ( 05kstmX += where Xkis the characteristic value; is the coefficient equal to: + 1 for the 95th percentile; - 1 for the 5th percentile; t05 is the Student coefficient for a one sided 5 % probability. All the other parameters a

48、re defined in 8.1.1 and 8.1.2. BS EN 1533:2010EN 1533:2010 (E) 13 Table 1 Student coefficient for a range of value of n Number of test assemblies n Student coefficient t05 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 40 60 2,02 1,94 1,90 1,86 1,83 1,81 1,80 1,78 1,77 1,76 1

49、,75 1,75 1,74 1,73 1,73 1,72 1,72 1,72 1,71 1,71 1,71 1,71 1,70 1,70 1,70 1,68 1,67 120 1,66 1,645 BS EN 1533:2010EN 1533:2010 (E) 14 8.2 Final results The values shall be expressed to three significant figures. If required, the characteristic values shall be calculated in accordance with 8.1.3 (5th percentile value for bending strength). 9 Test report The test report shall contain the following information: a) The name and address of the l