EUROPEAN STANDARD EN310 NORME EUROPEENNE EUROPAISCHENORM February1993 UDC674.03:620.172.225:620.174 Descriptors: Wood-based panel,particleboardplywood,fibreboard,osB,cement-bonded particleboard,testmethod. modulus of elasticity,bending strength. Englishversion Wood-based panels Determination of modulus of elasticity in bending andofbendingstrength Panneaux a base de bois; determination Holzwerkstoffe; Bestimmung des Biege- du module d'elasticite en flexion et de la Elastizitatsmoduls und der Biegefestigkeit resistance a la fiexion This European Standard was approved by CEN on 1992-12-15. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulatethe conditionsfor giving this European Standardthe statusofa national standard without any alteration. Up-to-date lists and bibliographical references concerningsuchnationalstandardsmaybe obtained on application to the Central Secretariat orto any CEN member. This European Standard exists in three official versions(English,French,German).A version in any other language madeby translation under the responsibility ofa CENmember into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway Portugal, Spain, Sweden,Switzerland and United Kingdom CEN European CommitteeforStandardization Comite Europeen de Normalisation Europaisches Komitee fur Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels @1993. Copyright reserved to all CEN members. Ref.No.EN310:1993E Page2 EN310:1993 Contents Page 1 Scope 2 Normativereferences 2 3 Principle 2 4 Apparatus. 2 5 Testpieces 6 Procedure.. Expression of results AnnexA (informative) Bibliography Foreword This European Standard was prepared by Working Group4Common test methods'(Secretariat:BSi)of Technicai CommitteeCEN/TC112'Wood-basedpanels,the Secretariatof which is heid byDIN. The text is based on draft International Standard IsO g429 which has been developed with European participation. This standard is one of a series of standards specifying methods of test fordetermining dimensions and properties of wood- basedpanels. NoexistingEuropeanStandardissuperseded. This European Standard shall be given the status of a national standard,either by publication of an identical text or by endorsement,by August 1993 at the latest,and conflicting national standards withdrawn,by December 1994 at the latest. Standard: Austria,Belgium,Denmark,Fintand,France,GermanyGreeceiceland,Ireland,Italy,Luxembourg,Netherlands,Norway Portugal, Spain, Sweden, Switzerland and United Kingdom. 1 Scope method includes shear as well as bending.The bending This European Standard specifies amethod of determining strength ofeachtest piece is calculatedby determining the the apparent modulus of elasticity in flatwise bending and ratioofthebendingmoment,M,atmaximumloadFmaxo the bending strength of wood-based panels of nominal the moment of its full cross section. thickness equal to orgreaterthan3mm. NOTE:Structural design values shall be deter- minedaccordingtoEN789 Apparatus 4.1 Measuring instruments As specified in EN325. 2 Normative references This European Standardincorporates,bydatedorundated 4.2Testingapparatus(seefigure1),havingthefollow- reference,provisionsfrom otherpublications.Thesenor- ingcomponents. mativereferencesarecitedattheappropriateplaces inthe text andthe publications are listed hereafter.For dated ref- erences,subsequentamendmentstoorrevisionsofanyof 4.2.1Twoparallel,cylindrical,roiler-bearingsupports,of these publications apply to this European Standard only length exceeding the width of the test piece, and of when incorporated in it by amendment or revision.Forun- (15±0,5)mm diameter.The distance between the sup- datedreferences,thelatesteditionofthepublicationrefer- ports shallbeadjustable redtoapplies. A cylindrical loading h