SIST EN 12871:2004

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Holzwerkstoffe - Leistungsspezifikationen und Anforderungen für tragende Platten zur Verwendung in Fußböden, Wänden und DächernPanneaux a base de bois - Spécifications et exigences fonctionnelles pour panneaux travaillants utilisés en planchers, murs et toituresWood-based panels - Performance specifications and requirements for load bearing boards for use in floors, walls and roofs79.060.01Wood-based panels in generalICS:Ta slovenski standard je istoveten z:EN 12871:2001SIST EN 12871:2004en01-januar-2004SIST EN 12871:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12871May 2001ICS 79.060.01English versionWood-based panels - Performance specifications andrequirements for load bearing boards for use in floors, walls androofsPanneaux à base de bois - Spécifications et exigencesfonctionnelles pour panneaux travaillants utilisés enplanchers, murs et toituresHolzwerkstoffe - Leistungsspezifikationen undAnforderungen für tragende Platten zur Verwendung inFußböden, Wänden und DächernThis European Standard was approved by CEN on 19 February 2001.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 nationalstandards may be obtained on application to the 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 and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12871:2001 ESIST EN 12871:2004

Page 2EN 12871:2001ContentsPageForeword .2
1Scope .3
2Normative references .3
3Terms and definitions .3
4Symbols and subscripts .5
5Specifications .5
6Performance requirements .10
7Sampling and evaluation .19
8Marking .19
9Documentation .2010Report .20Annex A (normative)
Normative references .21Annex B (informative)
Guidance of installation .24Annex C (normative)
Wood-based panels — Structural roof decking onjoists — Performance test method .25Bibliography .26ForewordThis European Standard has been prepared by Technical Committee CEN/TC 112 "Wood-based panels", thesecretariat of which is held by DIN.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by November 2001, and conflicting national standards shall be withdrawn at the latestby November 2001.This European Standard combines the drafts published as prEN 12869-1:1997, prEN 12869-2:1997,prEN 12870-1:1997, prEN 12870-2:1997, prEN 12871-1:1997, prEN 12872-2:1997 and prEN 12871-3:1997.In the structural use of wood-based panels there are two methods of achieving satisfactory performance of thecompleted structure.The first approach is to design the structure by calculation using structural characteristic values (contained inEN 12369 or derived accoridng to EN 1058 and EN 789), where there are no requirements for impact and concen-trated loads, or where compliance with these requirements can be demonstrated. Subject to the above limitations,the method can be applied to any structure, but because of the method of generation of the various assumptionsused in design calculation, the derived design may not be optimized in terms of performance.The second approach is to design the structure by prototype testing in order to satisfy the requirements for bothimpact and concentrated loading. This test work is complemented by calculation in order to satisfy the requirementfor uniformly distributed load. This approach yields a more optimised design, the results from the testing apply onlyto that one specific design.This standard relates specifically to the second approach, namely, design by prototype testing. Thus, this standardsets out the specifications and requirements for load bearing wood-based panels used as structural floor or roofdecking or wall sheathing.No existing European Standard is superseded.The annexes A and C are normative. Annex B is informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,Switzerland and the United Kingdom.SIST EN 12871:2004

Page 3EN 12871:20011 ScopeThis European Standard sets out the performance specifications and requirements for load bearing wood-basedpanels used as structural decking and sheathing in floors, roofs and walls, and provides a method of demonstratingcompliance based on prototype testing.Reference is also made to general performance requirements for loads not defined in ENV 1991-1, ENV 1991-2-1or ENV 1995-1-1.Uniformly distributed loads in accordance with ENV 1991-2-1 are not included in this standard; but can be verifiedby calculation according to ENV 1995-1-1, see clause 6.The concept of punching shear is included within this standard.This European Standard also specifies requirements for additional properties for load bearing wood-based panelsused as structural decking and sheathing in floors, roofs and walls, which are not given in other EuropeanStandards.2 Normative referencesSee annex A.3 Terms and definitionsFor the purposes of this standard the following terms and definitions apply:3.1service classes3.1.1service class 1is characterized by a moisture content in the materials corresponding to a temperature of 20 °C and the relativehumidity of the surrounding air only exceeding 65 % for a few weeks per year [ENV 1995-1-1]3.1.2service class 2is characterized by a moisture content in the materials corresponding to a temperature of 20 °C and the relativehumidity of the surrounding air only exceeding 85 % for a few weeks per year [ENV 1995-1-1]3.1.3service class 3climatic conditions leading to higher moisture contents than in service class 2 [ENV 1995-1-1]3.2serviceability limit statesee ENV 1995-1-1 and ENV 1991-13.3ultimate limit statesee ENV 1995-1-1 and ENV 1991-13.4characteristic valuesee ENV 1995-1-1 and ENV 1991-1SIST EN 12871:2004

Page 4EN 12871:20013.5hazard classessee EN 335-13.6load categorysee ENV 1991-2-13.7structural floor deckingan assembly of wood-based panels supported on joists over which the decking spans. The characteristic of thedecking is that it is supported by joists and, when subjected to load, is free to deflect between the joists3.8structural wall sheathingwood-based panel capable of providing mechanical resistance to a wall structure3.9structural roof deckingan assembly of wood-based panels supported on joists over which the roof decking spans. The characteristic of thedecking is that it is supported by joists and, when subjected to load, is free to deflect between the joists3.10warm roofroof design in which the panels supported on joists are placed below the insulation. The panels are considered tobe under conditions corresponding to service class 13.11cold roofroof design in which the panels and some of the supporting joists are placed above the insulation. The panels areconsidered to be under conditions corresponding to service class 23.12setresidual deformation of the test floor, wall or roof after the removal of the applied load3.13sub-floorstructural panel meant to be covered by overlays3.14racking resistancecapacity of a component to resist an in-plane load3.15racking stiffnesssecant stiffness of a component when it is in-plane loaded to approximately 40 % of its maximum racking resistanceSIST EN 12871:2004

Page 5EN 12871:20013.16punching shearthe performance of a panel under a concentrated load excluding the effect of bending4 Symbols and subscripts4.1 SymbolsFdirect action, force (load) applied to structure, in kilonewtonskfaktorLcentre to centre distance (span) of the joists or studs, in millimetresQvariable action, concentrated load (imposed load), in kilonewtonsRstiffness of the structural decking or sheathing, in kilonewtons per millimetreudeflection, in millimetresgpartial safety factor4.2 SubscriptsQactionskcharacteristicmmaterial propertydefdeformationdisdistribution (concentrated load contact area)maxmaximummodmodificationserserviceability055-percentile1, 2, 3service class 1, 2 or 3 in accordance with ENV 1995-1-1aroof slope (angle)ppanel5 Specifications5.1 GeneralThe specification and parameters included in tables 1 and 2 shall be used for load bearing wood-based panels forstructural decking and sheathing in floors, roofs and walls.SIST EN 12871:2004

Page 6EN 12871:2001Table 1 — Panel product specification for structural decking and sheathingin floors, roofs and wallsCharacteristicsRelevant ENParticleboard–service class and gradeEN 312-4/5/6/7OSB–service class and grade–main load bearing directionEN 300-OSB/2/3/4Plywood–lay-up–wood species and surface appearance class–service class–main load bearing directionEN 313-1/2EN 635-1/2/3EN 636-1/2/3Solid-wood-panelbFibreboard–service class, type and gradeEN 622-2/3/5Cement-bonded particleboarda–service classEN 634-2aCement-bonded particleboards shall only be used for structural design provided valuesof kmod and kdef have been determined in accordance with ENV 1156bTo be included when EN specifications are available.Table 2 — Parameters to be specified for structural decking and sheathing in floors, roofs and wallsDesign parameterRelevant ENExplanationSpan (joist spacing) for floorsEN 1195Determined from the performance testSpan (stud spacing) for wallsEN 594EN 596Determined from the performance testSpan (joist spacing) for roofsAnnex DDetermined from the performance testJoints–the method of supporting the paneledgesEN 324-1/2Dimensions — According to that used inthe performance test–type of panel to panel joints (e.g.tongued & grooved, square edgedwith noggins)EN 324-1Tolerances — According to that used inthe performance test–type of fasteners (e.g. nailed,screwed and spacing)—According to that used in theperformance test–type of glue if relevant—Determined from the performance testPanel dimensionsClauses 6.4.1 and6.4.2TolerancesThicknessEN 324-1According to that used in the perform-ance testConditioning before installation–moisture contentEN 322Specified by the manufacturer —Related to service class–dimensional changes of the paneldue to change in moisture contentEN 318Specified by the manufacturer —Related to service class and functionSIST EN 12871:2004

Page 7EN 12871:20015.2 DurabilityFor all load bearing wood-based panels used for structural decking and sheathing in floors, roofs and walls in serviceclasses 1, 2 or 3 the biological hazard classes and the moisture resistance or glue bond quality depending on paneltype, shall be specified in accordance with the standards listed in table 3.Table 3 — European Standards relating to the durability of load bearing wood-based panelsPanel TypeRelevant ENExplanationSpecificationsandguidanceTest methodsParticleboardEN 335-3bEN 312-4/5/6/7EN 312-5/7EN 321EN 1087-1Biological hazard classesService class 1 — Dry conditionsService class 2 — Humid conditionsService class 2 — Cyclic test (Option 1)Service class 2 — Boil test (Option 2)OSBEN 335-3bEN 300 OSB/2/3/4EN 300 OSB/3/4EN 321EN 1087-1aBiological hazard classesService class 1 — Dry conditionsService class 2 — Humid conditionsService class 2 — Cyclic test (Option 1)Service class 2 — Boil test (Option 2)PlywoodEN 335-3bENV 1099EN 636-1/2/3EN 636-2/3EN 636-3EN 314-1/2Biological hazard classesGuideline for biological durabilityService class 1 — Dry conditionsService class 2 — Humid conditionsService class 3 — Exterior conditionsTests and requirements according to serviceclassSolid-wood-panelcFibreboardEN 335-3bEN 622-2/3/5type LA/HA/HLSEN 622-2/3/5type HA/HLSEN 321EN 1087-1aBiological hazard classesService class 1 — Dry conditionsService class 2 — Humid conditionsService class 2 — Cyclic test (Option 1)Service class 2 — Boil test (Option 2)Cement-bondedParticleboardEN 335-3bEN 634-2EN 634-2EN 634-2EN 321EN 1328Biological hazard classesService class 1 — Dry conditionsService class 2 — Humid conditionsService class 3 — Exterior conditionsService class 2 — Cyclic testService class 3 — Frost testaEN 1087-1 test methods are modified for OSB and Fibreboard type MDF, see panel specification standardbThis standard describes the moisture content that can be attained by different panel products and their risk of attack fromdifferent wood-destroying organisms (fungi, insects and marine borers) when exposed to different service environments.The service environments are defined in terms of the hazard classes of biological attack (see EN 335-1). It does notdefine the expected service life of the different panel products when used in different service environments.cTo be included when EN specifications are available.SIST EN 12871:2004

Page 8EN 12871:20015.3 Mechanical properties5.3.1 GeneralTest methods are set out in table 4.Table 4 — European Standards relating to mechanical properties and test methodsCharacteristicRelevant ENExplanationUniformly distributed loadBending strength/stiffnessEN 1058EN 789EN 12369EN 1072Sampling for and determination of characteristicvaluesTechnical data sheet from the manufacturerCharacteristic values for structural usePlywood onlyTension strength/stiffnesscDepending on designEN 1058EN 789EN 12369Sampling for and determination of characteristicvaluesTechnical data sheet from the manufacturerCharacteristic values for structural useCompression strength/stiffnesscDepending on designEN 1058EN 789EN 12369Sampling for and determination of characteristicval
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