EN 1794-2:2003
(Main)Road traffic noise reducing devices - Non-acoustic performance - Part 2: General safety and environmental requirements
Road traffic noise reducing devices - Non-acoustic performance - Part 2: General safety and environmental requirements
This European Standard specifies minimum requirements and other criteria for assessing the general safety and environmental performance of road traffic noise reducing devices under typical roadside conditions. Requirements for more onerous conditions are a matter for consideration by the designer. Appropriate test methods are provided where these are necessary, but for some aspects a declaration of material characteristics can be required for the information of designers. The treatment of each topic is covered separately in annexes A to F.
Lärmschutzeinrichtungen an straßen - Nichtakustische Eigenschaften - Teil 2: Allgemeine Sicherheits - und Umweltanforderungen
Diese Europäische Norm enthält Mindestanforderungen sowie andere Kriterien zur Bewertung von Lärmschutzeinrichtungen hinsichtlich der Sicherheit und des Umweltschutzes im Allgemeinen unter für den Straßenrand typischen Bedingungen. Anforderungen für schwierigere Bedingungen sind vom Planer festzulegen. Sofern erforderlich, sind geeignete Prüfverfahren angegeben, für einige Aspekte benötigt der Planer jedoch möglicherweise Angaben über die Materialeigenschaften. Diese Aspekte werden in den Anhängen A bis F dieser Norm einzeln behandelt.
Dispositifs de réduction du bruit du trafic routier - Performances non acoustiques - Partie 2: Exigences générales pour la sécurité et l'environnement
La présente Norme européenne spécifie les exigences minimales et les autres critères d'évaluation de la sécurité générale ainsi que des performances relatives à l'environnement des dispositifs de réduction du bruit du trafic routier dans des conditions classiques d'installation en bordure de route. Les exigences liées à des cas plus difficiles sont à prendre en compte par le concepteur. Des méthodes d'essai appropriées sont données chaque fois que cela est nécessaire mais, pour certains aspects, une spécification des caractéristiques du matériau destinée à l'information des concepteurs est susceptible d'être exigée. Chaque sujet est traité séparément dans les annexes A à F.
Protihrupne ovire za cestni promet - Neakustične lastnosti – 2. del: Splošne zahteve za varnost in varstvo okolja
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Lärmschutzeinrichtungen an straßen - Nichtakustische Eigenschaften - Teil 2: Allgemeine Sicherheits - und UmweltanforderungenDispositifs de réduction du bruit du trafic routier - Performances non acoustiques - Partie 2: Exigences générales pour la sécurité et l'environnementRoad traffic noise reducing devices - Non-acoustic performance - Part 2: General safety and environmental requirements93.080.30Cestna oprema in pomožne napraveRoad equipment and installations17.140.30Emisija hrupa transportnih sredstevNoise emitted by means of transportICS:Ta slovenski standard je istoveten z:EN 1794-2:2003SIST EN 1794-2:2004en01-junij-2004SIST EN 1794-2:2004SLOVENSKI
STANDARDSIST EN 1794-2:19991DGRPHãþD
SIST EN 1794-2:2004
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1794-2April 2003ICS 93.080.30Supersedes EN 1794-2:1998English versionRoad traffic noise reducing devices - Non-acoustic performance- Part 2: General safety and environmental requirementsDispositifs de réduction du bruit du trafic routier -Performances non acoustiques - Partie 2: Exigencesgénérales pour la sécurité et l'environnementLärmschutzeinrichtungen an straßen - NichtakustischeEigenschaften - Teil 2: Allgemeine Sicherheits - undUmweltanforderungenThis European Standard was approved by CEN on 2 January 2003.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,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1794-2:2003 ESIST EN 1794-2:2004
EN 1794-2:2003 (E)2ContentspageForeword.3Introduction.41Scope.52Normative references.53Terms, definitions and symbols.54Requirements.65Test report.7Annex A (normative)
Resistance to brushwood fire.8Annex B (normative)
Secondary safety : danger of falling debris.10Annex C (normative)
Environmental protection.15Annex D (normative)
Means of escape in emergency.16Annex E (normative)
Light reflection.17Annex F (informative)
Transparency.18Bibliography.23SIST EN 1794-2:2004
EN 1794-2:2003 (E)3ForewordThis document (EN 1794-2:2003) has been prepared by Technical Committee CEN /TC 226 "Road equipment", thesecretariat of which is held by AFNOR.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 October 2003, and conflicting national standards shall be withdrawn at the latestby October 2003.This document supersedes EN 1794-2:1998.This European standard consists of the following parts under the general title "Road traffic noise reducing devices -Non-acoustic performance" :¾ Part 1 : Mechanical performance and stability requirements¾ Part 2 : General safety and environmental requirementsAnnexes A to E of this part of EN 1794 are normative and annex F is informative.Another standard covering long term durability (service life) is in course of preparation.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, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 1794-2:2004
EN 1794-2:2003 (E)4IntroductionWhile performing their primary function, road traffic noise reducing devices should not pose hazards to road usersor other people in the vicinity or to the environment at large. Noise reducing devices should not assist the spread offire from adjacent verges or nearby land. Fire resistance in accordance with particular standards can in addition berequired to minimise risk to adjacent premises, or to road users in confined corridors. Noise reducing devicesshould not reflect light in such a way as to prejudice road safety. They should be made from materials which do notemit noxious fumes or leachates as the result of natural or industrial processes, or as the result of fire. Noisereducing devices should allow a means of escape by road users and access by operatives in the event of anemergency.Noise reducing devices are not in general expected to resist the impact of vehicles, but designers can needinformation about the consequences of such impact load to establish the requirements for protection of road usersand passers by.SIST EN 1794-2:2004
EN 1794-2:2003 (E)51 ScopeThis European Standard specifies minimum requirements and other criteria for assessing the general safety andenvironmental performance of road traffic noise reducing devices under typical roadside conditions. Requirementsfor more onerous conditions are a matter for consideration by the designer. Appropriate test methods are providedwhere these are necessary, but for some aspects a declaration of material characteristics may be required for theinformation of designers. The treatment of each topic is covered separately in annexes A to F.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 410, Glass in building - Determination of luminous and solar characteristics of glazing.EN 1794-1: 2003, Road traffic noise reducing devices - Non-acoustic performance - Part 1: Mechanicalperformance and stability requirements.EN 2155-5, Aerospace series -Test methods for transparent materials for aircraft glazing – Part 5: Determination ofvisible light transmission.EN ISO 2813, Paints and varnishes - Determination of specular gloss of non-metallic paint films at 20°, 60° and 85°(ISO 2813:1994, including Technical Corrigendum 1:1997)3 Terms, definitions and symbols3.1 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply:3.1.1noise barriernoise reducing device which obstructs the direct transmission of airborne sound emanating from road traffic3.1.2claddingnoise reducing device which is attached to a wall or other structure to reduce the amount of sound reflected3.1.3covernoise reducing device which either spans or overhangs the highway3.1.4structural elementelement whose primary function is to support or hold in place acoustic elements3.1.5acoustic elementelement whose primary function is to provide the acoustic performance of the deviceSIST EN 1794-2:2004
EN 1794-2:2003 (E)63.2 Symbolsamangle at which reflections from the surface of the transparent material obscure the view through thematerial, in degree ;an angle of transparency (see Figure F.1), in degrees ;ßnangle of opacity (see Figure F.1), in degrees ;KAvisual acuity factor (see Figure F.2), in degrees ;LTlight transmission index (as determined in accordance with EN 410 or EN 2155-5), in per cent ;SOarea of opaque features within transparent elements, in square millimetres ;STtotal area of transparent elements, including horizontal features, in square millimetres ;Ttransparency, in percent ;Trtransparency looking right, in percent ;Tl =Transparency looking left, in percent ;TDdynamic transparency, in percent ;TSstatic transparency, in percent.4 Requirements4.1 Resistance to brush fireThe noise reducing device shall be classified in accordance with annex A.NOTEThis European Standard permits specifying authorities to indicate that there is no requirement for resistance tobrushwood fire.4.2 Secondary safety (falling debris)When a secondary safety has to be assessed, this shall be done in accordance with annex B.NOTEThis European Standard permits specifying authorities to indicate that there is no requirement for secondary safety.4.3 Environmental protectionThe constituent materials and their breakdown products shall be identified in accordance with annex C.NOTEThis European Standard permits specifying authorities to indicate that there is no requirement for environmentalprotection.4.4 Means of escape in emergencyThe acoustic and mechanical performances of doors or other means of escape shall be assessed in accordancewith annex D.NOTEThis European Standard permits specifying authorities to indicate that there is no requirement for means of escapein emergency.SIST EN 1794-2:2004
EN 1794-2:2003 (E)74.5 Reflection of lightThe results of a standard test of reflectivity shall be quoted in accordance with annex E.NOTEThis European Standard permits specifying authorities to indicate that there is no requirement for light reflection.4.6 TransparencyThe results of a standard test of transparency should be quoted in accordance with annex F.NOTEThis European Standard permits specifying authorities to indicate that there is no requirement for transparency.5 Test report5.1Every test report on aspects of performance shall include the following information :a) number and year of this European Standard, EN 1794-2:2003 ;b) full description of the element or system tested, including manufacturer(s), part numbers, place and date oforigin ;c) description of the method of sampling, if parts of manufactured elements are evaluated by testing ;d) place and date of assessment, and the name of the assessor ;e) sufficient description of any tests carried out, any results measured and the conclusions drawn about theproduct together with any illustrations or photographs, all as specified in the appropriate annex.5.2A summary report shall be produced, identifying the aspects of performance for which detailed reports areavailable and the level of performance assessed, where appropriate.SIST EN 1794-2:2004
EN 1794-2:2003 (E)8Annex A(normative)Resistance to brushwood fireA.1 GeneralA noise reducing device can be exposed to fire arising from dry vegetation or other material in close proximity.More severe fires from spilt fuel can arise as the result of traffic accidents.Where a noise reducing device is in close proximity to property it can also be necessary to consider the need toensure that fire is not spread from the highway.Where flammable systems are used, it is recommended that firebreaks of fire-resistant materials or other designare incorporated into the noise reducing device in order to prevent the propagation of fire. This annex is notapplicable to such fire resistant material.This annex describes a test for a representative panel of a vertical noise barrier under normal exposure tobrushwood fires at the roadside.It does not provide information on the results of exposure to more severe conditions e.g. ignition by burning spiltfuel. The test should not be used to provide information on the fire safety of claddings used for tunnels or partialcovers over the highway.A.2 RequirementsThe noise reducing device, after being tested by the method given in A.3, shall be classified as follows :¾ class 1 : if the panel has been damaged to a greater extent than as defined for classes 2 and 3 ;¾ class 2 : if the damaged area above either source is less than 0.06 m2 and extends to no more than 200 mmabove the base of the panel, and the panel has not been burnt through to the other side ;¾ class 3 : if there is no damage other than discoloration.A.3 Fire testA.3.1Acoustic elements of at least 2 m long by 1,5 m high shall be tested by exposure to localised sources of fireat its base next to the front and rear faces independently. Panels shall be free of absorbed water before testing; inthe case of timber components, the moisture content shall be reduced to 18 % by an approved drying method.The mass and dimensions of the panel to be tested shall be measured and the panel shall be photographed. Anidentical panel shall be examined to determine its construction; the dimensions of its elements, including wallthickness of hollow sections, shall be measured and noted on a sketch at 1:20 scale.A.3.2Testing shall be carried out in an enclosed fireproof and draught-free chamber having a volume of atleast 150 m3.Fume extraction devices may be installed in or near the ceiling, but shall be prevented from fanning any flamesduring the test.The temperature of the chamber, including the floor, before the test begins shall be between 15 °C and 25 °C. Thechamber should be fitted with an observation port or window in a suitable position to observe the panel during thetest.SIST EN 1794-2:2004
EN 1794-2:2003 (E)9A.3.3Two identical sources of fire shall be prepared as follows :a) a rectilinear wire mesh basket 300 mm by 200 mm by 300 mm high shall be made from welded steel wiremesh, having a square mesh of 3 mm diameter drawn steel wire at 50 mm centres ;b) in addition, three 3 mm diameter wires 300 mm long shall be secured in a vertical position inside the basket,equispaced along the central line of the shorter dimension.The flammable material shall comprise shavings of spruce, 0,2 mm thick by 2 mm wide, and approximately 50 mmlong. The material shall be free from splinters and have a maximum moisture content of 30 % ; it shall beacclimatised at 20 °C and 65 % humidity until its weight is constant.600 g of shavings shall be lightly pressed down into each basket so that it is just filled.A.3.4The test panel shall be supported in a vertical position corresponding to its orientation in use, on a plinthsupporting the full length of the panel. The plinth shall be of masonry or concrete and have a vertical step to a levelof 250 mm above the floor of the chamber. The base of the test panel shall be completely in contact with the plinthand the face to be tested shall be flush with the edge. The two sources of fire shal
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