1、 STD-BSI BS EN b35-5-ENGL 1777 Lb2Ybb9 0797085 753 W BRITISH STANDARD Plywood - Classification by surface appearance - Part 5: Methods for measuring and expressing characteristics and defects The European Standard EN 63561999 has the status of a British Standard ICs 79.060.10 BS EN i35-5:1999 - U NO
2、 COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGm LAW STD.BS1 BS EN b35-5-ENGL 1999 Lb21ibb7 079708b b7T 9 direction of the Sector Committee for Buiidmg and Civil Engineering, was published under the authority of the Standards Committee and comes into effect on 15 August 1999 Amd. No.
3、O BSI 08-1999 BS EN 635-5:1999 Date Comments National foreword This British Standard is the English language version of EN 6355: 1999. The UK participation in its preparation was entrusted to Technical Committee B41, Wood-based panels, which has the responsibility to: - aid enquirers to understand t
4、he text; - present to the responsible European committee any enquiries on the - monitor related international and European developments and promulgate interpretation, or proposals for change, and keep the UK interests hformed them in the UK A list of organizations represented on this committee can b
5、e obtained on request to its secretary. Cross-references The British Standards which implement international or European 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 “F
6、ind” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contsact. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from leg
7、al obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cover. The BSI copyright notice displayed throughout this document indicates when the document was last issued. ISBN O 580 32361 7 STD-BSI B
8、S EN b35-5-ENGL 1999 II Lb2LibbS 0797087 52b m EUROPEAN sr.ANDm EN 635-5 NOFWF, EUROPENNE EUROP and - a tramparent or semi-tramparent film printed with a rectangular grid; or - any optical system, able to measure the requested quantities, i.e. lengths, wid*, diameters and areas. 6 Methods for measur
9、ement 6.1 Quantity in number Quantities in number of characteristics and defects shall be related to the full panel surface area anel length multiplied by panel width) with the only exceptions of open splits and open joints, for which the number shail be related to the panel width. 6.2 Diameter 6.2.
10、1 The measurement shall be expressed to the nearest millimebe. 6.2.2 The diameter of knots and knot holes shall be measured as the distance between two opposite tangents plotted to the circumference of the knot (or hole) in a direction parallel to the wood fibre direction of the surface veneer (see
11、Figure 1). a) Length direction of the panel Figure 1- Dimensions to be used to express the diameter (d) of knot holes and similar characteristics 6.3 Length 6.3.1 The measurement shall be expressed to the nearest millime or 6.6.2.2 scanning the tracing with suitable electronic 6.6.3 Direct measureme
12、nt The area of the characteristic or defect can be measured directly using a suitable electsonic image identification equipment. Annex A (informative) Bibliography ENV 635-4, Plywood - Classifkatwn by Ju.sclce appearance - Part 4: Parameters of ability for finishing - GuuEeline. Figure 4- “kacing of
13、 the outline of a characteristic or a defect on a transparent squared grid used to determine the area 7 Test report The test report b) their number, length, width or area as wProP*, c) the method used for determination of the area 6.6.2.1,6.6.2.2 or 6.6.3. O BSI 08-1999 BS EN 635-51999 BSI 389 Chisw
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