EN 14081-4-2009 6250 Timber structures - Strength graded structural timber with rectangular cross section - Part 4 Machine grading - Grading machine settings for machine controlled.pdf

1、BS EN14081-4:2009ICS 79.040; 79.120.10NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDTimber structures Strength gradedstructural timber withrectangular crosssectionPart 4: Machine grading Gradingmachine settings for machinecontrolled systemsCopyright European C

2、ommittee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-This British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 31 July 2009 BSI 2009ISBN 978 0 580 64314 9Amend

3、ments/corrigenda issued since publicationDate CommentsBS EN 14081-4:2009National forewordThis British Standard is the UK implementation of EN 14081-4:2009. Itsupersedes BS EN 14081-4:2005 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/518, Structural

4、 timber.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity

5、from legal obligations.Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 14081-4:2009EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14081-4May 2009ICS 79.040; 79.120.10 Su

6、persedes EN 14081-4:2005+A4:2008 English VersionTimber structures - Strength graded structural timber withrectangular cross section - Part 4: Machine grading - Gradingmachine settings for machine controlled systemsStructures en bois - Bois de structure de sectionrectangulaire class selon la rsistanc

7、e - Partie 4:Classement par machine - Rglages pour les systmes decontrle par machineHolzbauwerke - Nach Festigkeit sortiertes Bauholz frtragende Zwecke mit rechteckigem Querschnitt - Teil 4:Maschinelle Sortierung - Einstellungen vonSortiermaschinen fr maschinenkontrollierte SystemeThis European Stan

8、dard was approved by CEN on 7 April 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such

9、 nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language an

10、d notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg,

11、 Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of explo

12、itation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14081-4:2009: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 14081-4:2009EN 14

13、081-4:2009 (E) 2 Contents Page Foreword . 31 Scope 42 Normative references 43 Terms and definitions . 44 Symbols 45 Settings for timber strength grading machines . 5 Table 1 - Settings for Cook Bolinder (Tecmach) machine types SG-AR, SG-AF and SG-TF 6Table 2 - Settings for Computermatic and Micromat

14、ic machines . 9Table 3 - Settings for Raute Timgrader machines (Model given in TG1/1007/06) 13Table 4 - Settings for Euro-GreComat 702 (Model given in TG1/0107/08) 14Table 5 - Settings for GoldenEye 702 (Model given in TG1/1005/08 for GB TG1/1005/09Rev for DE, AT additional requirements for initial

15、type testing EN 14081-3, Timber structures - Strength graded structural timber with rectangular cross section - Part 3: Machine Grading; additional requirements for factory production control According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following cou

16、ntries 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, Romania, Slovakia, Slovenia, Sp

17、ain, Sweden, Switzerland and the United Kingdom. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 14081-4:2009EN 14081-4:2009 (E) 4 1 Scope This European Standard gives sett

18、ings, derived according to the requirements given in EN 14081-2, for various combinations of strength classes or grades, grading machines and species from particular sources of growth. These settings are only applicable to timber from the sources indicated in the tables. 2 Normative references The f

19、ollowing 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 (including any amendments) applies. EN 336, Structural timber Sizes, permitted deviations

20、EN 14081-1:2005, Timber structures - Strength graded structural timber with rectangular cross section - Part 1: General requirements EN 14081-2:2005, Timber structures - Strength graded structural timber with rectangular cross section - Part 2: Machine Grading; additional requirements for initial ty

21、pe testing 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 14081-1:2005, EN 14081-2:2005 and the following apply. 3.1 Speed range maximum and minimum throughput speeds appropriate to the critical speed for the derived settings (see 6.2.2 of EN 14081-2

22、:2005). 4 Symbols a deflection (in mm) b width of timber cross section (in mm) Et,meancharacteristic mean tensile modulus of elasticity parallel to grain (in N/mm2) E0,meancharacteristic mean bending modulus of elasticity parallel to grain (in N/mm2) Edynvalue of dynamic modulus of elasticity (in N/

23、mm2) Emodmodel value of modulus of elasticity (units as stated) F force (units as stated) ft,kcharacteristic tensile strength (in N/mm2) Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from I

24、HS-,-,-BS EN 14081-4:2009EN 14081-4:2009 (E) 5fm,kcharacteristic bending strength (in N/mm2) fmodmodel value of strength (in N/mm2) I indicating property (units as stated) P pressure (units as stated) t thickness of timber cross section (in mm) vcconveyer speed (in m/sec) kcharacteristic value of de

25、nsity (in kg/m3) modmodel value of density (in kg/m3) subscripts n for setting being calculated a actual size measured as the average dimension of a batch 5 Settings for timber strength grading machines Tables 1 to 15 give settings for certain grades, timber species and types of grading machine. The

26、 accepted grading machines and settings in this European Standard are based on initial type testing (ITT) and initial type calculation (ITC). When additional ITT and ITC documentation from the manufacturers has been evaluated by CEN/TC124/TG1, the accepted values are given in an ITT report, which is

27、 the basis for certification by the Notified Bodies overseeing the producers factory production control (FPC). Those ITT reports may be used as ITT documentation before the information they contain becomes available in an amendment or revision of this European Standard, EN 14081-4. Copyright Europea

28、n Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 14081-4:2009EN 14081-4:2009 (E) 6 Table 1-1 - Settings for Cook Bolinder (Tecmach) machine types SG-AR, SG-AF and SG-TF Source country or cou

29、ntries Source marka)Species Permitted timber sizesb) (mm) Gradec)or grade combination Model value Force F (kN) Comments and additional requirements UK Ireland GB IE Spruce Picea abies Picea sitchensis 35 tn 75 60 bn 300 C24 C16 2,68 2,27 Requirements for grading: - Air temperature between +10C and +

30、35C - Relative humidity in the air: = -10 C - Timber mean moisture content: 10 % - Maximum feed speed: 150 m/min The following equations shall be used to calculate settings for the target size bnx tn. (Note. For timber with a thickness to tolerance class 1, i.e. sawn, tnin the following equations is

31、 the target tn+ 1 mm). an= 830,7 tn-1,299(mm) Pn= 4,412 Fn/ tn0,61(bar) ()572739,413n1.701nnn+=ttFbF (kN) C16 1,24Pine Pinus nigra Pinus sylvestris 35 tn 75 60 bn 300 C24 C16 2,79 1,91 C16 1,34Chile CL Radiata pine Pinus radiata 35 tn 50 60 bn 300 C27 C16 3,03 1,43 C24 C16 2,32 2,09 C16 0,92a) See C

32、lause 7.3 in EN 14081-1:2005 b) Timber sizes shall be to EN 336c) Grades prefixed by C are strength classes given in EN 338 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN

33、14081-4:2009EN 14081-4:2009 (E) 7 Table 1-2 - Settings for Cook Bolinder (Tecmach) machine types SG-AR, SG-AF and SG-TF (continued) Source country or countries Source marka)Species Permitted timber sizesb)(mm) Gradec)or grade combination Model value modComments and adjustments for size Estonia Finla

34、nd Latvia Norway Russiad)Sweden Poland Finland Norway Sweden Latvia EE FI LV NO RU SE PL FI NO SE LV Spruce Picea abies Pine Pinus sylvestris 30 tn 75 60 bn 300 C18 20,8 Requirements for grading: - Air temperature between +10C and +35C - Relative humidity in the air: = -10 C - Timber mean moisture c

35、ontent: 10 % - Maximum feed speed: 150 m/min The following equations shall be used to calculate settings for the target size bnx tn. (Note. For timber with a thickness to tolerance class 1, i.e. sawn, tnin the following equations is the target tn+ 1 mm). Pn= 4,412 Fn/ tn0,61(bar) Fn= (5,5I n n bntn3

36、)10-12(kN) an= 830,7 tn-1,299(mm) I n = 79.0mod24,022,0f4228nnbtC24 20,8 C27 21,8 C30 28,5 C35 C24 46,5 20,0 C40 C30 C18 54,5 30,6 23,8 a) See Clause 7.3 in EN 14081-1:2005 b) Timber sizes shall be to EN 336 c) Grades prefixed by C are strength classes given in EN 338 d)Settings apply only to timber

37、 grown west of the Ural mountain range and north of the 550line of latitude in Russia Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 14081-4:2009EN 14081-4:2009 (E) 8 Tabl

38、e 1-3 - Settings for Cook Bolinder (Tecmach) machine types SG-AR, SG-AF and SG-TF (continued) Source country or countries Source marka)Species Permitted timber sizesb)(mm) Gradec)or grade combinationModel value Force F (kN) Comments and adjustments for size Spain ES Scots pine Pinus sylvestris 35 tn

39、 75 60 bn 300 C27 C16 2,84 1,71 Requirements for grading: - Air temperature between +10C and +35C - Relative humidity in the air: = -10 C - Timber mean moisture content: 10 % - Maximum feed speed: 100 m/min The following equations shall be used to calculate settings for the target size bnx tn. (Note

40、. For timber with a thickness to tolerance class 1, i.e. sawn, tnin the following equations is the target tn+ 1 mm). an= 830,7 tn-1,299(mm)Pn= 4,412 Fn/ tn0,61 (bar)()572739,413n1.701nnn+=ttFbF Spain ES Corsican pine Pinus nigra 40 tn 70 100 bn 200 C30 C18 Not relevant as all settings shall be calcu

41、lated using equations in comments column Requirements for grading: - Air temperature between +10C and 35C - Relative humidity in the air: -10 C - Timber mean moisture content: 10 % - Maximum feed speed: 100 m/min The following equations shall be used to calculate settings for the target size bnx tn.

42、 (Note. For timber with a thickness to tolerance class 1, i.e. sawn, tnin the following equations is the target tn+ 1 mm). an= 830,7 tn-1,299(mm) Pn= 4,412 Fn/ tn0,61(bar)FnC30 = (96,2979 0,489321tn)anbntn3 / (1,3189433.109) FnC18 = (54,4979 0,489321tn)anbntn3 / (1,3189433.109) a) See Clause 7.3 in

43、EN 14081-1:2005 b) Timber sizes shall be to EN 336 c) Grades prefixed by C are strength classes given in EN 338 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 14081-4:2009

44、EN 14081-4:2009 (E) 9 Table 2-1 -Settings for Computermatic and Micromatic machines Source country or countries Source marka)Species Permitted timber sizesb)(mm) Gradec)or grade combination Model value Deflection a (mm) Comments and additional requirements UK Ireland GB IE Spruce Picea abies Picea s

45、itchensis 35 tn 75 60 bn 300 C24 C16 6,35 7,49 Requirements for grading: - Relative humidity in the air: = -10 C - Timber mean moisture content: 10 % - Maximum feed speed: 105 m/min The following equations shall be used to calculate settings for the target size bnx tn. (Note. For timber with a thick

46、ness to tolerance class 1, i.e. sawn, tnin the following equations is the target tn+ 1 mm). Fn= 0,0101 bntn2(N) ()91,0109851,07846,000567,071,36nn5nnn+=btttaa (Bits) Actual deflection settings are determined from an/0,19 rounded to the nearest whole number. Refer to calibration tables for machine to

47、 convert Force Fnto pressure setting C16 13,78 Pine Pinus nigra Pinus sylvestris 35 tn 75 60 bn 300 C24 C16 6,10 8,90 C16 12,74 Chile CL Radiata pine Pinus radiata 35 tn 50 60 bn 300 C27 C16 5,62 11,86 C24 C16 7,35 8,13 C16 18,52 a) See Clause 7.3 in EN 14081-1:2005 b) Timber sizes shall be to EN 33

48、6 c) Grades prefixed by C are strength classes given in EN 338 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 14081-4:2009EN 14081-4:2009 (E) 10 Table 2-2 - Settings for Computermatic and Micromatic machines (continued) Source country or countries Source marka)Species Permitted timber sizesb)(mm) Gradec)or grade combination Model va