BS EN 13183-1-2002 Moisture content of a piece of sawn timber - Determination by oven dry method《一块锯木材的含水量 用烘干法测定》.pdf

1、BRITISH STANDARD BS EN 13183-1:2002 Incorporating Corrigendum No. 1 Moisture content of a piece of sawn timber Part 1: Determination by oven dry method The European Standard EN 13183-1:2002 has the status of a British Standard ICS 79.040 BS EN 13183-1:2002 This British Standard, having been prepared

2、 under the direction of the Building and Civil Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 8 May 2002 BSI 18 December 2003 ISBN 0 580 39685 1 National foreword This British Standard is the official English lang

3、uage version of EN 13183-1:2002, including Corrigendum September 2003. The UK participation in its preparation was entrusted by Technical Committee B/543, Round and sawn timber, to Subcommittee B/543/1, Timber terminology and measurement, which has the responsibility to: A list of organizations repr

4、esented on this subcommittee can be 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 Corresp

5、ondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not

6、of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulga

7、te them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 5 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comment

8、s 14847 18 December 2003 Correction to Clause 5 and Figure 1EUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN131831 April2002 ICS79.040 Englishversion MoisturecontentofapieceofsawntimberPart1: Determinationbyovendrymethod TeneurenhumiditdunepicedeboissciPartie1: Dterminationparlamthodepardessiccatio

9、n FeuchtegehalteinesStckesSchnittholzTeil1: BestimmungdurchDarrverfahren ThisEuropeanStandardwasapprovedbyCENon29December2001. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Upt

10、odatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownla

11、nguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EU

12、ROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN131831:2002E Incorporating corrigendum September 2003 tuC a

13、test o ecilsf furc lloces sstdna noi miminum m 02m idmni noisne teh ridetco noif teh gr,nia at a tsidecna of 0,m 3 frmo ne enoo dr teh toreh of the eceip (or m eht tainiop dt of ssel seceip t0 nah,6 m ol)gn. Teh teb llahs ecils tse free from rew nisa doodn featruse hcus sa rab,k tonks r dnaekcop nis

14、ets. fI hcus featruse xetsi, tuc the tets f ecilsrmo teh aenrets raelc raae towards the ctnere of the test ( eceipsgiF eeure 1). EN131831:2002(E) 2 Contents page FOREWORD 3 1S C O P E 3 2 NORMATIVEREFERENCES 3 3 TERMSANDDEFINITIONS 4 4 APPARATUS 4 5 PROCEDURE 4 6 CALCULATIONANDEXPRESSIONOFTHERESULTS

15、 5EN131831:2002(E) 3 Foreword ThisdocumentEN131831:2002hasbeenpreparedbyCEN/TC175“Roundandsawn timber”,thesecretariatofwhichisheldbyAFNOR. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublication ofanidenticaltextorbyendorsement,atthelatestbyOctober2002,andconflictingnational

16、 standardsshallbewithdrawnatthelatestbyOctober2002. Thisstandardisoneofaseries,dealingwithmethodsofmeasurementforroundtimberand sawntimber. Otherstandardsinthisseriesare: EN131832 : MoisturecontentofapieceofsawntimberPart2:Estimationby electricalresistancemethod. EN13091 : RoundandsawntimberMethodof

17、measurementofdimensions Part1:Sawntimber. EN1310 : RoundandsawntimberMethodofmeasurementoffeatures. EN1311 : RoundandsawntimberMethodofmeasurementofbiological degrade. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizations ofthefollowingcountriesareboundtoimplementthisEuropea

18、nStandard:Austria,Belgium, CzechRepublic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy, Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,Switzerlandandthe UnitedKingdom. 1Scope ThisEuropeanStandarddefinesthemethodfordeterminingthemoisturecontentofapieceof sawntimber. Thismetho

19、disconsideredasthereferencemethod. Thisstandardappliestosawntimber,andtimberwhichhasbeenplanedormechanically surfacedbyothermeans. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromother publications.Thesenormativereferencesarecitedattheappropriateplacesin

20、thetext,and thepublicationsarelistedhereafter.Fordatedreferences,subsequentamendmentstoor revisionsofthesepublicationsapplytothisEuropeanStandardonlywhenincorporatedinitby amendmentorrevision.Forundatedreferencesthelatesteditionofthepublicationreferredto applies(includingamendments). EN8441, Roundan

21、dsawntimberTerminologyPart1:Generaltermscommontoround timberandsawntimber. EN8443, RoundandsawntimberTerminologyPart3:Generaltermsrelatingtosawn timber.EN131831:2002(E) 4 EN8444, RoundandsawntimberTerminologyPart4:Termsrelatingtomoisturecontent. EN8446, RoundandsawntimberTerminologyPart6:Termsrelati

22、ngtodimensionsof sawntimber. EN8447, RoundandsawntimberTerminologyPart7:Termsrelatingtoanatomical structureoftimber. EN8449, RoundandsawntimberTerminologyPart9:Termsrelatingtofeaturesofsawn timber. EN84412, RoundandsawntimberTerminologyPart12:Additionaltermsandgeneral index. 3 Termsanddefinitions Fo

23、rthepurposesofthisEuropeanStandard,thetermsanddefinitionsofEN8441,EN8443, EN8444 ,EN8446 ,EN8447 ,EN8449andEN 84412apply. 4Apparatus Balanceaccurateto0,1g,ifthemassofthetestsliceislikelytobemorethan100ginan ovendrystate. Balanceaccurateto0,01g,ifthemassofthetestsliceislikelytobelessthan100ginan oven

24、drystate. Equipmentfordryingwood,ensuringfreeinternalcirculationofairandcapableofmaintaining atemperatureof(1032)C. 5Procedure oecilstsetatuCffudnanoitcesssorcll miminum02mmmidetninoisnridehetcfonoithe gr,niatniopataybtam003mfromtiehreodnefthteeeceipts , rottaehmitniopdfitheceipe tsselsihm006namgnol

25、.Thetelahsecilstsfeblreefromrewnisfdnadooetarusahcusse rabk,ktonrdnasekcopnisetsfI.hcusftaeruxesetsi,tucthteefecilstsrmothraenetseraelc areaotwadrhtseecnterofhteetptsiecees(eFiuger1). cnIorroptagni corriegmudn tpeSmereb 3002 Cut a test slice of full cross section and minimum 20 mm dimension in the d

26、irection of the grain, at a distance of 0,3 m from one end or the other of the piece (or at the mid point of pieces less than 0,6 m long). The test slice shall be free from resin wood and features such as bark, knots and resin pockets. If such features exist, cut the test slice from the nearest clea

27、r area towards the centre of the test piece (see Figure 1). EN131831:2002(E) 5 Dimensionsinmillimetres Key 1Testpiece 2Testslice Figure1Positionofthetestslice Weighthetestsliceimmediatelyaftercutting. Drytheweighedtestsliceatatemperatureof(1032)C,untilthedifferenceinmass betweentwosuccessiveweighing

28、sseparatedbyanintervalof2hoursislessthan0,1%. Ifitisnotpossibletoweighthetestsliceimmediatelyaftercutting,putthetestsliceinasealed containertopreventmoisturechangeandweighwithin2hours. Carryoutthedryweightmeasurementimmediatelyafterthetestslicehasbeentakenoutof theoven. Inordertoobtainaccurateresult

29、s,timberwhichcontainshighamountsofvolatile components(resin)shouldbedriedundervacuumconditions(pressure100Pa) ,atlow temperature(max.50C)orinadesiccatorcontaininganhygroscopicsubstance. 6 Calculationandexpressionoftheresults Calculatethemoisturecontent, ,asapercentagebymass,usingtheformula: mm m x 1

30、0 0 100 where m 1 isthemassofthetestslicebeforedrying,ingrams; m 0 isthemassoftheovendrytestslice,ingrams; isthemoisturecontent,inpercent. Expresstheresulttothenearest0,1percentagepointmoisturecontent.BS EN 13183-1:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI i

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