Wood-based panels - Determination of performance characteristics for load bearing panels for use in floors, roofs and walls

This European Standard specifies:
-   concentrated load test and assessment methods for floor and roof decking;
-   soft body impact assessment methods and classification system for floors, roofs and walls.
This European Standard does not include racking testing or uniformly distributed loads as these are covered by testing according to EN 594 or calculation according to EN 1995-1-1 respectively.
This European Standard specifies the procedure for determining the performance characteristics through type testing, of load-bearing wood-based panels fitted on:
a)   structural joists for decking:
1)   in flooring applications in load categories A, B, C and D;
2)   in roof applications in load categories H and I;
for which type testing involves:
i)   punching shear under concentrated loading;
ii)   vertical soft body impact;
b)   studs for walling application for which type testing involves:
1)   pendular soft body impact.
Annex A (normative) lists modifications to EN 1195, particularly the contact area of the loading head that may be used for concentrated loading.
Annex B (informative) provides proposals for national performance requirements.
Annex C (informative) provides examples for a decking application in a floor and a roof.

Holzwerkstoffe - Bestimmung der Leistungseigenschaften für tragende Platten zur Verwendung in Fußböden, Wänden und Dächern

Diese Europäische Norm legt Folgendes fest:
•   Prüfung von Punktlasten und Bewertungsverfahren für tragenden Unterboden und tragende Dachschalung;
•   Bewertungsverfahren für die Prüfung durch weichen Stoß sowie Klassifizierungssysteme für Fußböden, Dächer und Wände.
Diese Europäische Norm enthält keine Prüfungen von Wandscheiben oder Flächenlasten, da diese entsprechend jeweils nach Prüfung in EN 594 oder Berechnung nach EN 1995-1-1 bestimmt werden können.
Diese Europäische Norm legt das Verfahren für die Bestimmung der Leistungseigenschaften durch Bauart-prüfung von tragenden Platten aus Holzwerkstoffen fest, die folgendermaßen befestigt sind:
a)   an tragenden Lagerhölzern:
1)   in Unterbodensystemen der Lastkategorien A, B, C und D;
2)   in Dachsystemen der Lastkategorien H und I;
für die die Bauartprüfung Folgendes umfasst:
i)   Stanzscherfestigkeit bei Punktbelastung;
ii)   senkrecht erfolgender weicher Stoß;
b)   Rippen für Wandsysteme, für die die Bauartprüfung Folgendes umfasst:
1)   pendelnder weicher Stoß.
Anhang A (normativ) führt die Änderungen aus EN 1195 auf, insbesondere die Kontaktflächen der Prüfstempel, die zur Punktbelastung verwendet werden dürfen.
Anhang B (informativ) enthält Vorschläge für nationale Leistungsanforderungen.
Anhang C (informativ) enthält Beispiele für Unterboden- und Dachschalungssysteme.

Panneaux à base de bois - Détermination des caractéristiques de performance des panneaux travaillants utilisés en planchers, toitures et murs

La présente norme européenne spécifie :
•   un essai de charge concentrée et des méthodes d'évaluation pour les platelages de planchers et de toitures ;
•   des méthodes d'évaluation de choc d'un corps mou et un système de classification pour les planchers, toitures et murs.
La présente norme européenne ne contient pas d'essais relatifs au contreventement ni de charges uniformément réparties car ils sont couverts respectivement par des essais conformément à l'EN 594 ou des calculs conformément à l'EN 1995-1-1.
La présente norme européenne spécifie le mode opératoire permettant de déterminer les caractéristiques de performance, par des essais de type, des panneaux travaillants à base de bois placés sur :
a)   solives pour platelage :
1)   pour des applications en planchers dans les catégories de charge A, B, C et D ;
2)   pour des applications en toitures dans les catégories de charge H et I ;
pour lesquelles l'essai de type implique :
i)   le cisaillement par poinçonnement sous charge concentrée ;
ii)   le choc par chute verticale d'un corps mou ;
b)   poteaux pour application en murs pour lesquels l'essai de type implique :
1)   le choc pendulaire d'un corps mou.
L'Annexe A (normative) donne une liste des modifications par rapport à l'EN 1195, notamment la zone de contact de la tête d'application de la charge qui peut être utilisée pour la charge concentrée.
L'Annexe B (informative) propose des exigences nationales de performance.
L'Annexe C (informative) fournit des exemples d'application de platelage en planchers et toitures.

Lesne plošče - Lastnosti in zahteve za nosilne plošče, ki se uporabljajo za pode, stene in strehe

Ta evropski standard določa: – zgoščen preizkus obremenitve in metode ocenjevanja za pode in strešne kritine; – metode ocenjevanja z udarcem z mehkim telesom in sistemi klasifikacije podov, streh in sten. Ta evropski standard ne vključuje preizkusov z natezanjem ali enakomerno razporejenimi bremeni, ker te pokriva preskušanje v skladu s standardom EN 594 ali računanje v skladu s standardom EN 1995-1-1. Ta evropski standard navaja postopke za ugotavljanje značilnosti nosilnih plošč na osnovi lesa s tipskim preskušanjem, nameščene na: a) strukturne nosilce za pode: 1) preizkusi tal pri kategorijah bremen A, B, C in D; 2) preizkusi streh pri kategorijah bremen H in I; za katere tipsko preskušanje vključuje: i) strig pod zgoščeno obremenitvijo; ii) vertikalen udarec z mehkim telesom; b) vijaki za namestitev v fasado, za katere tipsko preskušanje vključuje: 1) nihajni udarec z mehkim telesom.

General Information

Status
Published
Publication Date
25-Jun-2013
Current Stage
9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
Completion Date
13-Jun-2018

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Holzwerkstoffe - Bestimmung der Leistungseigenschaften für tragende Platten zur Verwendung in Fußböden, Wänden und DächernPanneaux à base de bois - Détermination des caractéristiques de performance des panneaux travaillants utilisés en planchers, toitures et mursWood-based panels - Determination of performance characteristics for load bearing panels for use in floors, roofs and walls79.060.01Wood-based panels in generalICS:Ta slovenski standard je istoveten z:EN 12871:2013SIST EN 12871:2013en,fr,de01-december-2013SIST EN 12871:2013SLOVENSKI

STANDARDSIST EN 12871:20101DGRPHãþD
SIST EN 12871:2013
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12871
June 2013 ICS 79.060.01 Supersedes EN 12871:2010English Version

Wood-based panels - Determination of performance characteristics for load bearing panels for use in floors, roofs and walls

Panneaux à base de bois - Détermination des caractéristiques de performance des panneaux travaillants utilisés en planchers, toitures et murs

Holzwerkstoffe - Bestimmung der Leistungseigenschaften für tragende Platten zur Verwendung in Fußböden, Wänden und Dächern This European Standard was approved by CEN on 1 May 2013.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC 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 translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12871:2013: ESIST EN 12871:2013

EN 12871:2013 (E) 2 Contents Page Foreword ..............................................................................................................................................................4 Introduction .........................................................................................................................................................5 1 Scope ......................................................................................................................................................6 2 Normative references ............................................................................................................................6 3 Terms and definitions ...........................................................................................................................7 4 Symbols and subscripts .......................................................................................................................9 4.1 Symbols ..................................................................................................................................................9 4.2 Subscripts ........................................................................................................................................... 10 5 General requirements ......................................................................................................................... 10 5.1 Specification of panels intended for load-bearing application ...................................................... 10 5.2 Mechanical properties ........................................................................................................................ 11 5.2.1 General ................................................................................................................................................. 11 5.2.2 Concentrated load on structural floor or roof decking on joists ................................................... 11 5.2.3 Soft body impact test ......................................................................................................................... 11 5.3 Sampling .............................................................................................................................................. 11 6 Determination of performance characteristics ................................................................................ 12 6.1 General Recommendations ............................................................................................................... 12 6.1.1 Dimensional tolerances: length and width ...................................................................................... 12 6.1.2 Dimensional tolerances: thickness................................................................................................... 12 6.1.3 Dimensional changes: linear expansion .......................................................................................... 12 6.1.4 Discrepancy at joints between panels .............................................................................................. 12 6.1.5 Edge profile of tongued and grooved or similar panels ................................................................. 12 6.2 Structural floor or roof decking on joists ......................................................................................... 13 6.2.1 General ................................................................................................................................................. 13 6.2.2 Determination of stiffness characteristics (serviceability limit state) for concentrated load .... 13 6.2.3 Determination of the serviceability load corresponding to the elasticity limit ............................ 13 6.2.4 Determination of Fmax,k ........................................................................................................................ 13 6.2.5 Determination of Impact Class for soft body impact ...................................................................... 13 6.3 Structural wall sheathing on studs ................................................................................................... 14 6.3.1 General ................................................................................................................................................. 14 6.3.2 Soft body impact test ......................................................................................................................... 15 7 Evaluation ............................................................................................................................................ 15 7.1 Concentrated load .............................................................................................................................. 15 7.2 Impact load .......................................................................................................................................... 15 8 Report .................................................................................................................................................. 15 Annex A (normative)

Modification to EN 1195 ............................................................................................. 17 A.1 Scope ................................................................................................................................................... 17 A.2 Modification to EN 1195 ..................................................................................................................... 17 Annex B (informative)

Proposal for performance requirements ............................................................... 18 B.1 Introduction ......................................................................................................................................... 18 B.2 Concentrated load .............................................................................................................................. 18 B.2.1 General ................................................................................................................................................. 18 B.2.2 Serviceability limit state ..................................................................................................................... 19 B.2.3 Ultimate limit state .............................................................................................................................. 19 B.2.4 Increase of span L. as a function of roof slope ............................................................................... 20 B.3 Soft body impact ................................................................................................................................. 21 SIST EN 12871:2013

EN 12871:2013 (E) 3 B.3.1 General ................................................................................................................................................. 21 B.3.2 Requirements ....................................................................................................................................... 21 Annex C (informative)

Example ..................................................................................................................... 22 C.1 General ................................................................................................................................................. 22 C.2 Features of the end use ...................................................................................................................... 22 C.2.1 Decking for flooring in housing applications ................................................................................... 22 C.2.2 Decking for an accessible cold roof (load category I) ..................................................................... 22 C.3 Type testing values of the component .............................................................................................. 22 C.3.1 Main features of the testing (according to EN 1195) ....................................................................... 22 C.3.2 Results .................................................................................................................................................. 22 C.4 Values for the calculation parameters .............................................................................................. 23 C.5 Determination of the Limit States of the component and compliance to recommended requirements ........................................................................................................................................ 23 C.5.1 Ultimate Limit State (according to B.2.3) .......................................................................................... 23 C.5.2 Serviceability Limit State (according to B.2.2) ................................................................................. 24 C.5.3 Summarisation ..................................................................................................................................... 24 Bibliography ...................................................................................................................................................... 25

SIST EN 12871:2013

EN 12871:2013 (E) 4 Foreword This document (EN 12871:2013) has been prepared by Technical Committee CEN/TC 112 “Wood-based panels”, the secretariat 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 or by endorsement, at the latest by December 2013, and conflicting national standards shall be withdrawn at the latest by December 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12871:2010. Compared to EN 12871:2010, the following changes have been made: a) the title of the standard has been changed, because this standard now only deals with determining performance characteristics; b) proposals for national performance requirements are given in Annex B; Annex B includes a new reduction factor for ultimate limit state; c) for soft body impact tests, 3 impact classes have been defined to describe the performance; they can be related to load categories as suggested in Annex B; d) this standard does not include testing of racking behaviour nor uniformly distributed loads as these are covered by testing according to EN 594 or calculation according to EN 1995-1-1 respectively; e) the possibility to increase the span in dependence on the roof slope was included to Annex B; f) the reference for the statistical evaluation of the results has been changed to EN 1058; g) the load pad used for point load testing is now 50 mm x 50 mm in all cases, see Annex A. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

SIST EN 12871:2013

EN 12871:2013 (E) 5 Introduction This European Standard provides methods for determining performance characteristics for concentrated loads and impact on wood-based panels used for structural floor or roof decking and for impact on wood-based panels used for wall sheathing. This European Standard takes the approach of type testing specific structures. This approach yields an optimised design since the results from the testing shall apply only to one specific design. This revision incorporates experiences from use, adopts the load area for concentrated load defined in EN 1991-1-1 and the evaluation methods from EN 1058.

This European Standard contains an informative annex with proposals for national requirements to the characteristics determined by this European Standard, based on Eurocodes and national annexes. SIST EN 12871:2013

EN 12871:2013 (E) 6 1 Scope This European Standard specifies: • concentrated load test and assessment methods for floor and roof decking; • soft body impact assessment methods and classification system for floors, roofs and walls. This European Standard does not include racking testing or uniformly distributed loads as these are covered by testing according to EN 594 or calculation according to EN 1995-1-1 respectively. This European Standard specifies the procedure for determining the performance characteristics through type testing, of load-bearing wood-based panels fitted on: a) structural joists for decking: 1) in flooring applications in load categories A, B, C and D; 2) in roof applications in load categories H and I; for which type testing involves: i) punching shear under concentrated loading; ii) vertical soft body impact; b) studs for walling application for which type testing involves: 1) pendular soft body impact. Annex A (normative) lists modifications to EN 1195, particularly the contact area of the loading head that may be used for concentrated loading. Annex B (informative) provides proposals for national performance requirements. Annex C (informative) provides examples for a decking application in a floor and a roof. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. 2.1 General EN 596, Timber structures — Test methods — Soft body impact test of timber framed walls EN 789, Timber structures — Test methods — Determination of mechanical properties of wood based panels EN 1058, Wood-based panels — Determination of characteristic 5-percentile values and characteristic mean values EN 1156, Wood-based panels — Determination of duration of load and creep factors EN 1195, Timber structures — Test methods — Performance of structural floor decking SIST EN 12871:2013

EN 12871:2013 (E) 7 EN 1990:2002, Eurocode — Basis of structural design

EN 1991-1-1, Eurocode 1: Actions on structures — Part 1-1: General actions — Densities, self-weight, imposed loads for buildings EN 1995-1-1:2004, Eurocode 5: Design of timber structures — Part 1-1: General — Common rules and rules for buildings 2.2 Product standards EN 300, Oriented Strand Boards (OSB) — Definitions, classification and specifications EN 312, Particleboards — Specifications

EN 622-2, Fibreboards — Specifications — Part 2: Requirements for hardboards EN 622-3, Fibreboards — Specifications — Part 3: Requirements for medium boards EN 622-5, Fibreboards — Specifications — Part 5: Requirements for dry process boards (MDF) EN 634-2, Cement-bonded particleboards — Specifications — Part 2: Requirements for OPC bonded particleboards for use in dry, humid and external conditions EN 636, Plywood — Specifications EN 13353, Solid wood panels (SWP) — Requirements EN 14279, Laminated Veneer Lumber (LVL) — Definitions, classification and specifications 3 Terms and definitions For the purposes of this document, the following terms and definitions apply.

3.1 service class 1 service class 1 is characterised by a moisture content in the materials corresponding to a temperature of 20 °C and the relative humidity of the surrounding air only exceeding 65 % for a few weeks per year [SOURCE: EN 1995-1-1:2004, 2.3.1.3] 3.2 service class 2 service class 2 is characterised by a moisture content in the materials corresponding to a temperature of 20 °C and the relative humidity of the surrounding air only exceeding 85 % for a few weeks per year [SOURCE: EN 1995-1-1:2004, 2.3.1.3] 3.3 service class 3 service class 3 is characterised by climatic conditions leading to higher moisture contents than in service class 2 [SOURCE: EN 1995-1-1:2004, 2.3.1.3] SIST EN 12871:2013

EN 12871:2013 (E) 8 3.4 serviceability limit states SLS states that correspond to conditions beyond which specified service requirements for a structure or structural member are no longer met [SOURCE: EN 1990:2002, 1.5.2.14.] 3.5 ultimate limit states ULS states associated with collapse or with other similar forms of structural failure [SOURCE: EN 1990:2002, 1.5.2.13] Note 1 to entry: Specifically to this standard, it applies to the maximum force Fmax applied to the tested component. 3.6 characteristic value value of a material or product property having a prescribed probability of not being attained in a hypothetical unlimited test series Note 1 to entry: This value generally corresponds to a specified fractile of the assumed statistical distribution of the particular property of the material or product. A nominal value is used as the characteristic value in some circumstances. [SOURCE: EN 1990:2002, 1.5.4.1] Note 2 to entry: In this standard, the probability of failing to pass the value is 5 % (5th percentile of the distribution). 3.7 load category for decking applications, class of imposed load defined according to their end-uses in EN 1991-1-1

Note 1 to entry: The load values are defined in the National Annexes to EN 1991-1-1 or, where not available, in EN 1991-1-1. 3.8 structural wall-sheathing vertical (or quasi-vertical) assembly of wood-based panels, supported by studs, capable of taking up loading in the 3 directions of space 3.9 structural floor-decking horizontal (or quasi-horizontal) assembly of wood-based panels fixed to supporting joists and spanning over them Note 1 to entry: When a load is applied on the decking, it is free to deflect between the joists. 3.10 sub-floor structural panel meant to be covered by overlays 3.11 structural roof-decking usually, sloping assembly of wood based panels, fixed to supporting joists and spanning over them Note 1 to entry: Roof assemblies are tested horizontally. Note 2 to entry: When a load is applied on the decking, it is free to deflect between the joists. SIST EN 12871:2013

EN 12871:2013 (E) 9 3.12 warm roof roof design in which the panels supported by the joists are placed below the insulation Note 1 to entry: Usually, the panels are considered to be under conditions corresponding to service class 1.

3.13 cold roof roof design in which the panels and some of the supporting joists are placed above the insulation Note 1 to entry: Usually, the panels are considered to be under conditions corresponding to service class 2.

3.14 set irreversible deformation (unevenness between two adjoining panels) of the test floor, wall or roof after the removal of the applied load 3.15 punching shear strength stress in the section of a panel under a concentrated load applied perpendicularly to its face by means of a loading head with a specified cross section 4 Symbols and subscripts 4.1 Symbols A Contact area of a square load pad F Force applied to the component being tested L Span between joists or studs (axis to axis distance) with horizontal test assembly L. Increased span between joists or studs (axis to axis distance), as a function of roof slope Qk Characteristic concentrated load for the relevant load category, specified in National Annexes to EN 1991-1-1 R Stiffness of the structural decking or sheathing for concentrated loading (experimental value) and racking kdef Deformation factor defined by EN 1995-1-1 kdis Correction factor converting test loads, for consideration of influence of size and shape of the load pad kmod

Modification factor defined by EN 1995-1-1 kred

Reduction factor for local types of failure wfin Final deflection . Roof slope γM Material partial factor defined by National Annexes to EN 1995-1-1 or, where not available, by EN 1995-1-1 γQ Action partial factor defined by National Annexes to EN 1990 or, where not available, by EN 1990 SIST EN 12871:2013

EN 12871:2013 (E) 10 ψ2 Factor for the quasi-permanent value of actions, defined by National Annexes to EN 1990 or, where not available, by EN 1990 4.2 Subscripts i Individual test value k Characteristic (in this standard, 5th percentile for test values) max Maximum value mean Mean value

ser related to Serviceability Limit State 5 General requirements 5.1 Specification of panels intended for load-bearing application Table 1 specifies the wood-based panel types for load bearing purposes in floor-decking, roof-decking and wall sheathing. Table 1 — Panel product specification standards for structural decking (floors and roofs) and sheathing (walls) Panel type Technical class Relevant EN Particleboard P4 P6 P5 P7 EN 312 OSB OSB/2 OSB/3 OSB/4 EN 300 Plywood EN 636-1 S

EN 636-2 S

EN 636-3 S EN 636 Solid wood panel SWP/1 S SWP/2 S SWP/3 S SWP/1 SD SWP/2 SD SWP/3 SD EN 13353 LVL LVL/1 LVL/2 LVL/3 EN 14279 Fibreboard HB.LA HB.HLA1 HB.HLA2 MBH.LA1 MBH.LA2 MBH.HLS1 MBH.HLS2 MDF.LA MDF.HLS EN 622-2

EN 622-3
EN 622-5 Cement bonded particle board a
— EN 634-2 a To be used only if the following properties are determined:
- the bending properties according to EN 789 and EN 1058,
- the mechanical durability according to EN 1156 for kmod and kdef
SIST EN 12871:2013

EN 12871:2013 (E) 11 5.2 Mechanical properties 5.2.1 General Test methods relevant to this standard are set out in Table 2. Table 2 — European Standards relating to mechanical properties and test methods Items Relevant standard Concentrated load Floor decking EN 1195 and Annex A

Roof decking EN 1195 and Annex A
Sampling See 5.3
NOTE

Proposals for performance requirements are provided in Annex B. Soft body impact test

Relevant standard Floor decking EN 1195 Wall sheathing EN 596 Roof decking EN 1195 Classification See 6.2.5.2 (for floor and roof decking). See 6.3.2 (for wall sheathing). Sampling See 5.3.

5.2.2 Concentrated load on structural floor or roof decking on joists The following performance characteristics of the component shall be assessed for the relevant load category: a) Stiffness and serviceability load (serviceability limit state); b) Maximum load (ultimate limit state).

5.2.3 Soft body impact test The performance to soft body impacts of the component, decking or walling applications, shall be evaluated.

NOTE The impact test is designed to simulate the action of falling person or object. The impact energy is increased in stages and the floor, roof or wall is checked for damage at each stage. 5.3 Sampling The panels to be used for an initial type testing (ITT) shall be sampled from at least 3 production runs over a period of at least three weeks.

The minimum number of test points is defined in Table 3. SIST EN 12871:2013

EN 12871:2013 (E) 12 Table 3 — ITT sampling for floors, roofs and walls Test Concentrated load EN 1195 Soft body impact EN 1195

(floors and roofs) Soft body impact EN 596
(walls) Number of test points
12 + 1 a
5 3 a additional test points for the determination of the estimate of Fmax.
NOTE Additional test points
improve the determination of the characteristic values.

NOTE For concentrated loading, provided that the size of the set-up allows for measurements on and off edge areas, several points can be tested on the same set-up. Therefore, the number of set-ups can be less than the number of test points specified in Table 3. 6 Determination of performance characteristics 6.1 General Recommendations 6.1.1 Dimensional tolerances: length and width When measured in accordance with EN 324-1, at a relative humidity of (65 ± 5) % and a temperature of (20 ± 2) °C, the tolerances on the nominal length and width of the panel should be:  + 0,0 mm;  - 3,0 mm. 6.1.2 Dimensional tolerances: thickness When measured in accordance with EN 324-1, at a relative humidity of (65 ± 5) % and a temperature of (20 ± 2) °C, the tolerances on the nominal thickness t of the panels should be those given in their own product standards. 6.1.3 Dimensional changes: linear expansion The expansion in either length or width due to a change in ambient relative humidity from 30 % to 85 % at 20 °C should not exceed 4 mm/m when tested in accordance with EN 318. 6.1.4 Discrepancy at joints between panels The acceptable unevenness at the joint between the upper faces of adjoining panels may depend on the overlay material and the end use. NOTE Sanding, at least locally to level minor unevenness, can be required. 6.1.5 Edge profile of tongued and grooved or similar panels The tongue and groove profiles of the supplied panels should be identical to those of the ITT panels. SIST EN 12871:2013

EN 12871:2013 (E) 13 6.2 Structural floor or roof decking on joists 6.2.1 General The weakest point in the floor or roof shall be determined prior to testing. All subsequent tests shall be carried out at this point. NOTE The weakest point of a floor or roof is often mid span on the groove side of a tongued and grooved panel. 6.2.2 Determination of stiffness characteristics (serviceability limit state) for concentrated load The tests for determination of the stiffness and of the deflection shall be carried out according to EN 1195 with the modifications given in Annex A. The mean value of stiffness (Rmean) shall be calculated from the individual R-values, see 7.1. 6.2.3 Determination of the serviceability load corresponding to the elasticity limit When type tested, the serviceability limit state Fser,i of a decking is reached if, on the load deflection curve, a discontinuity, showing irreversible damage, occurs, even if cracks or other damages are not visible. This points to the elasticity limit of the decking. The characteristic value (Fser,k) of the weakest parts of the set-ups is processed from the individual test values (Fser,i) according to 7.1. NOTE 1 In service, the serviceability limit state is reached when visible cracks or other significant changes are found, which can impair the normal function of the floor or roof.

NOTE 2 The serviceability limit state for the concentrated load is not covered by EN 1195. NOTE 3 Fser is critical for panels failing at a low deflection level. If the load-deflection graphs are missing in a EN 1195 test report, Fser,k shall be derived from Fmax,k in accordance with: ser,kmax,k0,7FF= (1) NOTE 4 The factor 0,7 is derived from analysis of European test results, according to EN 1195, on particleboards, OSB, MDF and plywood panels. 6.2.4 Determination of Fmax,k

The test for determination of Fmax shall be carried out according to EN 1195 with the modifications given in Annex A. The characteristic value (Fmax,k) of the weakest parts of the set-ups is processed from the individual test values (Fmax,i) according to 7.1.

6.2.5 Determination of Impact Class for soft body impact 6.2.5.1 General The soft body impact test purports to assess the resistance of the flooring or roofing to actions imposed during the life of the building, excluding the period of construction.

The tests for determination of the performance regarding impact load shall be carried out according to EN 1195. The performance is described by the Impact Cla

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