Raised access floors

This standard specifies the characteristics and performance requirements of raised access floors for which the main intended use is the internal fitting out of buildings, providing full access to the services to the plenum. This standard does not cover requirements related to dangerous substances which may be subject to regulations.
It is applicable to modular, factory made flooring elements, comprising panels and pedestals and defines the test methods and measurement.
It provides for the evaluation of conformity of the product to this European Standard.


Diese Europäische Norm legt die Eigenschaften und die Anforderungen an das Verhalten von Doppelböden fest, die hauptsächlich für den Innenausbau von Gebäuden unter Bereitstellung einer freien Zuggängigkeit zum Hohlraum eingesetzt werden. Die Norm gilt nicht für Anforderungen an gefährliche Substanzen, die gesetzlichen Bestimmungen unterliegen können.
Sie gilt für industriell hergestellte modulare Fußbodenelemente, die aus Platten und Stützen bestehen, und legt Prüf- und Messverfahren fest.
Die Bewertung der Konformität des Produktes mit dieser Europäischen Norm wird festgelegt.

Planchers surélevés

La présente norme spécifie les caractéristiques et les prescriptions afférentes applicables aux planchers surélevés à libre accès, conçus en premier lieu pour être installés à l'intérieur de bâtiments et offrir un accès total aux servitudes techniques situées dans le plenum. Elle ne couvre pas les exigences relatives aux substances dangereuses qui peuvent faire l'objet de réglementations.
Elle s'applique aux éléments de planchers modulaires, fabriqués en usine, comportant des dalles et des vérins et définit les méthodes d'essais et de mesures.
Elle définit également des éléments pour l'évaluation de la conformité des produits à la présente Norme européenne.

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Dvignjeni podiDoppelbödenPlanchers surélevésRaised access floors91.060.30Stropi. Tla. StopniceCeilings. Floors. StairsICS:Ta slovenski standard je istoveten z:EN 12825:2001SIST EN 12825:2001en01-december-2001SIST EN 12825:2001SLOVENSKI

SIST EN 12825:2001

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12825August 2001ICS 91.060.30English versionRaised access floorsPlanchers surélevésDoppelbödenThis European Standard was approved by CEN on 21 July 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 12825:2001 ESIST EN 12825:2001

EN 12825:2001 (E)2ContentspageForeword21Scope32Normative references33Terms and definitions44Requirements65Test and measurement methods

96Evaluation of conformity337Marking, labelling and packaging34BibliographyForewordThis European Standard has been prepared by Technical Committee CEN/TC 323 "RaisedAccess Floors", the secretariat of which is held by SNV.This European Standard shall be given the status of a national standard, either by publica-tion of an identical text or by endorsement, at the latest by February 2002, and conflictingnational standards shall be withdrawn at the latest by February 2002.This European Standard has been prepared under a mandate given to CEN by the Euro-pean Commission and the European Free Trade Association, and supports essential re-quirements of EU Directive(s).According to the CEN/CENELEC Internal Regulations, the national standards organizationsof the following countries are bound to implement this European Standard: Austria, Belgium,Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Lux-embourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United King-dom.SIST EN 12825:2001

EN 12825:2001 (E)31 ScopeThis standard specifies the characteristics and performance requirements of raised accessfloors for which the main intended use is the internal fitting out of buildings, providing fullaccess to the services to the plenum. This standard does not cover requirements related todangerous substances which may be subject to regulations.It is applicable to modular, factory made flooring elements, comprising panels and pedestalsand defines the test methods and measurement.It provides for the evaluation of conformity of the product to this European Standard.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from otherpublications. These normative references are cited at the appropriate places in the text, andthe publications are listed hereafter. For dated references, subsequent amendments to otherrevisions of any of these publications apply to this European Standard only when incorpo-rated in it by amendment or revision. For undated references the latest edition of the publi-cation referred to applies (including amendments).EN 1081Resilient floor coverings - Determination of electrical resistance.EN ISO 140-12Acoustics – Measurement of sound insulation in buildings and of building elements – Part 12:Laboratory measurement of room to room airborne and impact sound insulation of an accessfloor (ISO 140-12:2000).EN 1815Resilient and textile floor coverings – Assessment of static electrical propensity.prEN 12524Building materials and products - Energy related properties - Tabulated design values.EN 12664Thermal performance of building materials and products – Determination of thermal resistanceby means of guarded hot plate and heat flow meter methods – Dry and moist products of me-dium and low thermal resistance.EN 12667Thermal performance of building materials and products – Determination of thermal resistanceby means of guarded hot plate and heat flow meter methods – Products of high and mediumthermal resistance.prEN 13501-1Fire classification of construction products and building elements – Part 1: Classification usingdata from fire reaction tests.prEN 13501-2Fire classification of construction products and building elements – Part 2: Classification usingdata from fire resistance tests (excluding products for use in ventilation systems).ENV 61024-1Protection of structures against lightning – Part 1: General principles (IEC 61024-1:1990,modified).SIST EN 12825:2001

EN 12825:2001 (E)4HD 384.4.41Electrical installations of buildings – Part 4: Protection for safety; Chapter 41: Protectionagainst electrical shock.HD 384.4.473Electrical installations of buildings – Part 4: Protection for safety; Chapter 47: Application ofprotective measures for safety; Section 473: Measures of protection against overcurrent.HD 384.5.54Electrical installations of buildings – Part 5:Selection and erection of electrical equipment;Chapter 54: Earthing arrangements and protective conductors.HD 384.6.61Electrical installations of buildings – Part 6: verification; Chapter 61: initial verification.3 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply:3.1 bridging / beamload bearing component to accommodate situations where pedestals and stringers/beams (ifavailable) cannot be located in their normal positions3.2 collapsestate reached when deflection of the element or panel will continue without further increasingthe test load3.3 componentsparts of access floor elements, e.g. panels, pedestals, stringers, etc.3.4 deflectionmovement of tested specimen caused by load expressed as a deviation from the former lin-ear level3.5 deformationalteration of the shape of a specimen3.6 deviationdifference between a specified dimension or position and the actual dimension or position3.7 edge trimcomponent of the panel, either adhered or mechanically fixed to all four sides to provideprotection to the panels and to the floor coveringSIST EN 12825:2001

EN 12825:2001 (E)53.8 elementkit that consists of one completely fabricated panel supported by pedestals together withother components e.g. stringers, conductive pads, etc. fixed as intended for the finished floor3.9 finished floor height (FFH)nominal vertical dimension from the specified

sub floor level to the specified finished floorlevel3.10 indentationmovement of the indentor into the specimen surface3.11 length of sideoverall dimension of any side of a panel3.12 manufacturer’s stated panel sizedimension to which the tolerances are applied3.13 nominal panel sizetheoretical dimension used for commercial description3.14 panelload bearing horizontal component of the access floor. It is supported by the under structure(e.g. pedestals and stringers)3.15 pedestalvertical component or part of the element which transmits the loading to the subfloor3.16 plenumavailable space between the underside of the panels of the access floor and the sub-floor3.17 plenum heightdistance between the highest point of the sub floor and the lowest point of the underside ofthe access floor3.18 raised access floorfactory made flooring system comprising panels supported on understructure of pedestals,and/or stringers or other components as applicable providing a load bearing structure for thefitting out of a building3.19 safety factorthe factor by which the ultimate load is divided to establish the working loadSIST EN 12825:2001

EN 12825:2001 (E)63.20 ultimate loadmaximum load at the time of failure of the element during the specified ultimate load testprocedure3.21 stringerhorizontal component connecting pedestals that may support panels (beams)3.22 systemassembly of elements forming a complete

installed raised access floor3.23 working loadload given by dividing the ultimate load by the safety factor (ultimate load is sometimescalled failure load and working load is sometimes called design load as well as nominal load)4 Requirements4.1 General and load classesThe ultimate load is the main criterion for classification.All other load bearing characteristics are related to the ultimate load.Raised access floors are classified according to the ultimate load as given in Table 1.Table 1 - Classes of elements ClassUltimate loadkN142638495106124.2 Load bearing capacity4.2.1 GeneralThe raised access floor shall be designed and manufactured in such a way that it providesmechanical resistance and stability and that the loading that is liable to act upon it during itsintended use will not lead to deformation or collapse.4.2.2 Static loading requirementsThe element when subjected to the test procedures as given in 5.2.1 shall meet the followingcriteria:SIST EN 12825:2001

EN 12825:2001 (E)7a)

Before the element collapses it shall have withstood the relevant ultimate load forits class as given in Table 1;b)

When the load applied is equivalent to the working load which is the ultimate loaddivided by the safety factor, the measured deflection shall not exceed the statedvalue in accordance to Table 2.Two classes of the safety factor are specified: 2,0 and 3,0.Table 2 - Classes of deflectionClassMaximum deflection, mmA2,5B 3,0C 4,04.2.3

Pedestal vertical load bearing capacityThe understructure has to support 4 times the working load of the system tested.The pedestal may not become distorted or damaged.Tests shall be carried out in accordance with Permanent deformation after loadingAfter the application for 30 min of a test load equivalent of the working load at the weakestpoint of the element, the residual deflection 5 min after the removal of the load shall not ex-ceed 0,5 mm when testing according to Dynamic loading requirements4.3.1

Absorption of hard body impactsWhere required, the element shall sustain the hard body impact test as described in 5.5.1.This test shall not cause any parts of the element to collapse, requiring that the test result bestated only if the test has been performed.4.3.2

Absorption of soft body impactsWhere required, the element shall sustain the soft body impact test as described in 5.5.2.This test shall not cause any parts of the element to collapse, requiring that the test result bestated only if the test has been performed.4.4 Dimensional deviationsThe panels of a raised access floor shall be manufactured within dimensions which enabletheir interchangeability.Deviations of dimensions shall not exceed the values given in Table 3 for one of the appro-priate classes.SIST EN 12825:2001

EN 12825:2001 (E)8Table 3 - Deviations on panel dimensionsDeviation in mmIdentificationclass 1Class 2Length of panel sides, see 5.6.3± 0,2± 0,4Squareness of panel, see 5.6.4± 0,3± 0,5Straightness of sides horizontally,see 5.6.5± 0,3± 0,5Thickness of panel without coveringsee 5.6.6± 0,3± 0,5Thickness of panel with coverings *,see 5.6.6± 0,3± 0,5Panel twist, see 5.6.70,50,7Vertical warping of panels, see 5.6.80,30,6Difference in height between perimetertrims and panel surface, see 5.6.9± 0,3± 0,4* plus thickness deviation of floor covering only if measuredincluding covering4.5 Protection against corrosionThe element shall comply with European standards, if existing, in respect of protection ofmetallic materials against corrosion if existing. In the absence of such standards, elementsshall comply with requirements valid in the place of use of the product.4.6 Peel resistance of floor coveringWhere peel resistance is required, the connection to the floor panel shall have a peel resis-tance more than 0,8 N/mm. The peel resistance shall be determined by the test method inaccordance with Reaction to fireWhere required, the raised access floor shall be classified for its reaction to fire according toprEN 13501-1. Where the test method permits a representative portion of the raised accessfloor to be tested, this shall be done in accordance with the provisions of that method (i.e. forthe positioning of joints). Where not possible, reaction to fire testing and classification shallbe on the basis of the performance of each component and/or material making up the raisedaccess floor. In this case, results for the raised access floor shall be based on stating thereaction to fire classification of each component and/or material.Where materials or components may be classified as reaction to fire Class A1 without theneed for testing1, this shall be stated for that material or component.

1 See Commission Decision 96/603/ECSIST EN 12825:2001

EN 12825:2001 (E)94.8Resistance to fireWhere required, the raised access floor shall be classified for its resistance to fire accordingto prEN 13501-2.4.9 Electrostatic conductivityThe element shall comply with EN 1081, EN 1815 and HD 384.6.61, where relevant.4.10 Risk of electrocutionThe element shall comply with HD 384.5.54, HD 384.4.473, where relevant.In addition the element shall comply with European Standards in respect of risk of electrocu-tion if existing. In the absence of such standards, elements shall comply with requirementsvalid in the place of use of the product.4.11 Acoustic insulationWhere required the impact and/or airborne sound insulation of the raised access floors shallbe tested in accordance to EN ISO 140-12.4.12 Thermal conductivityWhere required, the thermal conductivity shall be determined in accordance to prEN 12524or by testing to EN 12644 or EN 12667.5 Test and measurement methods5.1GeneralTesting of the element shall be carried out with reference to the requirements as follows:The tests in 5.2, 5.3, 5.4, 5.5, 5.6 and 5.7 shall be carried out at a temperature of (20

5) ° Cand (55

10) % relative humidity.If adhesive is used to fix the pedestals the tests in 5.2, 5.3, 5.4 and 5.5 shall begin as deter-mined by the manufacturer but not before 48 hours have elapsed.Test specimen shall be taken at random from the actual production and shall be representa-tive of actual or intended day to day production.The test report shall contain the following minimum information for all tests:1)

Name and address of testing body;2) Name and address of the applicant;3) Date of submittal of samples or sampling of test specimens;4) Date of test;5) Environmental conditions;6) Description and construction details (include grade and classification details) of materialssubmitted for tests;7) Accuracy and precision of test equipment used;8) Numeric results of measurement of tests as stipulated and the classes or grade reached;9) Statement of PASS or FAIL for hard body and soft body impact test, if relevant, and anydamage which occurred;10) Signature and designation of person responsible.SIST EN 12825:2001

EN 12825:2001 (E)105.2 Static load5.2.1 Load test on element5.2.1.1 Test conditionsSee PrincipleA steadily increasing load shall be applied to an element until failure of the element occurs. Agraph shall be produced showing the deflection of the element against the applied load. ApparatusA test apparatus in accordance with the layout of Figure 1, together with a deflection meas-uring device connected to a continuous recording apparatus. ProcedurePanels shall be mounted on the particular pedestals as they would be on site. Pedestalsshall be adjusted to their maximum permissible height. If stringers are part of the elementthey shall be included together with any other fixings such as bolts holding panels to pedes-tals. If adhesive is used to fix the pedestals to the sub-floors then the test shall not beginuntil 48 h after the adhesive was first applied.A steel frame shall be rigidly fixed around the panel without direct connection as shown inFigure 1 to avoid horizontal movement of the element.The indentor shall be a (25 ± 0,1) mm steel cube, the corners of which shall be rounded to aradius of not more than 2 mm. The test shall be repeated four times placing the indentor inthe following positions:- at the centre of the weakest edge, where this can be identified, if not two adjacent edgesshall be tested;- at the centre of the panel;- at a diagonal 70 mm from the edge of a pedestal head;- at any point which the test laboratory considers a point of weakness.A new panel shall be used for each test. The pedestals may be re-used at the discretion ofthe test laboratory if they have not been deformed in any manner.A bedding-in load consisting of the working load stated by the manufacturer shall be appliedand maintained for a period of 5 min via the indentor and then released.The deflection sensor is zeroed after (5 ± 1) min loading of 200 N. This load has to be re-leased before the beginning of the test.A steadily increasing load shall be applied at a speed of 120 N/s ± 10 % until failure of anypart of the element occurs. The deflection on the underside of the panel shall be continu-ously recorded from the beginning up to the point of failure. Expression of results and precision of test methodsDeflection readings shall be read within a limit of error of ± 0,01 mm and load within an errorof

1 %.A graph shall be produced showing deflection against the applied test load.The deflections at the points where the test load equals the specified working load and fail-ure load shall be specifically marked on the graph. The maximum deflection permitted at theworking load shall be indicated on the graph.SIST EN 12825:2001

EN 12825:2001 (E)11Dimensions in millimetresKey1 Measurement table2 Pedestal3 Panel4 Rigid frame5 Indentor (25 mm x 25 mm)F LoadFigure 1

- Load test on element5.3.1 Pedestal vertical load test5.3.1.1 SamplingAll parts forming a pedestal shall be taken at random from the actual production. Preparation and preservation of samples and test piecesSee PrincipleA load is applied to determine whether the pedestals meet the requirement defined in ApparatusA test apparatus in accordance with Figure 2 shall be used. ProcedureThe pedestal base shall be rigidly fastened to a rigid substratum within the test apparatus.Instead of fastening by adhesive or mechanical fixing an appropriate clamping device maybe used providing its adequacy is proven by comparative tests and checked at regular inter-vals.SIST EN 12825:2001

EN 12825:2001 (E)12The same applies to the use of the same pedestal bases for more t


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