SIST EN 1794-2:2011
(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 may be required for the information of designers. The treatment of each topic is covered separately in annexes A to F.
Lärmschutzeinricihtungen an Straßen - Nichtakus - tische Eigenschaften - Teil 2: Allgemeine Sicherheits - und Umweltanforderungen
Diese Europäische Norm legt Mindestanforderungen sowie andere Kriterien zur Bewertung von Lärm-schutzeinrichtungen hinsichtlich der Sicherheit und des Umweltschutzes im Allgemeinen unter für den Straßenrand typischen Bedingungen fest. 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 varovanje okolja
Ta evropski standard določa minimalne zahteve in druga merila za ocenjevanje splošne varnosti in okoljske učinkovitosti protihrupnih ovir za cestni promet pod tipičnimi pogoji na cestah.
Zahteve za težje pogoje so predmet obravnave konstrukterjev. Primerne preskusne metode so določene, kjer so potrebne, vendar je lahko za nekatere vidike potrebna deklaracija o značilnostih materiala kot informacija za konstrukterje. Obravnava vsake posamezne teme je zajeta ločeno v dodatkih od A do F.
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Lärmschutzeinricihtungen an Straßen - Nichtakus - tische 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 1794-2:2011SIST EN 1794-2:2011en,fr,de01-julij-2011SIST EN 1794-2:2011SLOVENSKI
STANDARDSIST EN 1794-2:20041DGRPHãþD
SIST EN 1794-2:2011
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1794-2
January 2011 ICS 93.080.30 Supersedes EN 1794-2:2003English Version
Road traffic noise reducing devices - Non-acoustic performance - Part 2: General safety and environmental requirements
Dispositifs de réduction du bruit du trafic routier - Performances non acoustiques - Partie 2: Exigences générales pour la sécurité et l'environnement
Lärmschutzeinrichtungen an Straßen - Nichtakustische Eigenschaften - Teil 2: Allgemeine Sicherheits- und Umweltanforderungen This European Standard was approved by CEN on 10 December 2010.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1794-2:2011: ESIST EN 1794-2:2011
EN 1794-2:2011 (E) 2 Contents page Foreword . 3Introduction . 41Scope . 52Normative references . 53Terms, definitions and symbols . 53.1Terms and definitions . 53.2Symbols . 54Requirements . 64.1Resistance to brush fire . 64.2Secondary safety (falling debris) . 64.3Environmental protection . 64.4Means of escape in emergency . 64.5Reflection of light. 64.6Transparency . 75Test report . 7Annex A (normative)
Resistance to brushwood fire . 8Annex B (normative)
Secondary safety: danger of falling debris . 10Annex C (normative)
Environmental protection . 14Annex D (normative)
Means of escape in emergency . 15Annex E (normative)
Light reflection . 16Annex F (informative)
Transparency . 18Bibliography . 26 SIST EN 1794-2:2011
EN 1794-2:2011 (E) 3 Foreword This document (EN 1794-2:2011) has been prepared by Technical Committee CEN /TC 226 "Road equipment", the secretariat 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 or by endorsement, at the latest by July 2011, and conflicting national standards shall be withdrawn at the latest by July 2011. 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 1794-2:2003. This European standard consists of the following parts under the general title "Road traffic noise reducing devices — Non-acoustic performance": Part 1: Mechanical performance and stability requirements Part 2: General safety and environmental requirements The main changes compared to the previous edition are: a) the classification in Table B.1; b) the Annex E with introduction of a classification of products; c) the Annex F completely revised. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
SIST EN 1794-2:2011
EN 1794-2:2011 (E) 4 Introduction While performing their primary function, road traffic noise reducing devices should not pose hazards to road users or other people in the vicinity or to the environment at large. Noise reducing devices should not assist the spread of fire from adjacent verges or nearby land. Fire resistance in accordance with particular standards can in addition be required to minimise risk to adjacent premises, or to road users in confined corridors. Noise reducing devices should not reflect light in such a way as to prejudice road safety. They should be made from materials which do not emit noxious fumes or leachates as the result of natural or industrial processes, or as the result of fire. Noise reducing devices should allow a means of escape by road users and access by operatives in the event of an emergency. Noise reducing devices are not in general expected to resist the impact of vehicles, but designers can need information about the consequences of such impact load to establish the requirements for protection of road users and passers by. SIST EN 1794-2:2011
EN 1794-2:2011 (E) 5 1 Scope 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 may be required for the information of designers. The treatment of each topic is covered separately in Annexes A to F. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1794-1:2011, Road traffic noise reducing devices — Non-acoustic performance — Part 1: Mechanical performance and stability requirements 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 symbols 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 noise barrier noise reducing device which obstructs the direct transmission of airborne sound emanating from road traffic 3.1.2 cladding noise reducing device which is attached to a wall or other structure to reduce the amount of sound reflected 3.1.3 cover noise reducing device which either spans or overhangs the highway 3.1.4 structural element element whose primary function is to support or hold in place acoustic elements 3.1.5 acoustic element element whose primary function is to provide the acoustic performance of the device 3.2 Symbols φm angle at which reflections from the surface of the transparent material obscure the view through the material, in degrees; φ0 angle between the visual axis and the normal to the noise reducing device (see Figure F.2), in degrees; αn
angle of transparency (see Figure F.2), in degrees; SIST EN 1794-2:2011
EN 1794-2:2011 (E) 6 ßn angle of opacity (see Figure F.2), in degrees; KA visual acuity factor (see Figure F.3), in degrees; LT light transmission index (as determined in accordance with EN 410 or EN 2155-5), in percent; SO area of opaque features within transparent elements, in square millimetres; ST total area of transparent elements, including horizontal features, in square millimetres; T transparency, in percent; Tr transparency looking right, in percent; Tl
transparency looking left, in percent; TD dynamic transparency, in percent; TS static transparency, in percent. 4 Requirements 4.1 Resistance to brush fire The noise reducing device shall be classified in accordance with Annex A. NOTE This European Standard permits specifying authorities to indicate that there is no requirement for resistance to brushwood fire. 4.2 Secondary safety (falling debris) When secondary safety has to be assessed, this shall be done in accordance with Annex B. NOTE This European Standard permits specifying authorities to indicate that there is no requirement for secondary safety. 4.3 Environmental protection The constituent materials and their breakdown products shall be identified in accordance with Annex C. 4.4 Means of escape in emergency The acoustic and mechanical performances of doors or other means of escape shall be assessed in accordance with Annex D. NOTE This European Standard permits specifying authorities to indicate that there is no requirement for means of escape in emergency. 4.5 Reflection of light The results of a standard test of reflectivity shall be quoted in accordance with Annex E. NOTE This European Standard permits specifying authorities to indicate that there is no requirement for light reflection. SIST EN 1794-2:2011
EN 1794-2:2011 (E) 7 4.6 Transparency The results of a standard test of transparency should be quoted in accordance with Annex F. NOTE This European Standard permits specifying authorities to indicate that there is no requirement for transparency. 5 Test report 5.1 Every test report on aspects of performance shall include the following information: a) number and year of this European Standard, i.e. EN 1794-2:2011; b) full description of the element or system tested, including manufacturer(s), part numbers, place and date of origin; 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 the product together with any illustrations or photographs, all as specified in the appropriate annex. 5.2 A summary report shall be produced, identifying the aspects of performance for which detailed reports are available and the level of performance assessed, where appropriate. SIST EN 1794-2:2011
EN 1794-2:2011 (E) 8 Annex A (normative)
Resistance to brushwood fire A.1 General A 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 to ensure that fire is not spread from the highway. Where flammable systems are used, it is recommended that firebreaks of fire-resistant materials or other design are incorporated into the noise reducing device in order to prevent the propagation of fire. This annex is not applicable to such fire resistant material. This annex describes a test for a representative panel of a vertical noise barrier under normal exposure to brushwood fires at the roadside. It does not provide information on the results of exposure to more severe conditions e.g. ignition by burning spilt fuel. The test should not be used to provide information on the fire safety of claddings used for tunnels or partial covers over the highway. A.2 Requirements The noise reducing device, after being tested by the method given in A.3, shall be classified as follows: class 1: if the panel has been damaged to a greater extent than as defined for classes 2 and 3; class 2:
if the damaged area above either source is less than 0,06 m2 and extends to no more than 200 mm above the base of the panel, and the panel has not been burnt through to the other side; class 3: if there is no damage other than discoloration. A.3 Fire test A.3.1 Acoustic elements of at least 2 m long by 1,5 m high shall be tested by exposure to localised sources of fire at its base next to the front and rear faces independently. Panels shall be free of absorbed water before testing; in the 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. An identical panel shall be examined to determine its construction; the dimensions of its elements, including wall thickness of hollow sections, shall be measured and noted on a sketch at 1:20 scale. A.3.2 Testing shall be carried out in an enclosed fireproof and draught-free chamber having a volume of at least 150 m3. Fume extraction devices may be installed in or near the ceiling, but shall be prevented from fanning any flames during the test. SIST EN 1794-2:2011
EN 1794-2:2011 (E) 9 The temperature of the chamber, including the floor, before the test begins shall be between 15 °C and 25 °C. The chamber should be fitted with an observation port or window in a suitable position to observe the panel during the test. A.3.3 Two 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 wire mesh, 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 mm long. The material shall be free from splinters and have a maximum moisture content of 30 %; it shall be acclimatised at 20 °C and 65 % relative 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.3.4 The test panel shall be supported in a vertical position corresponding to its orientation in use, on a plinth supporting the full length of the panel. The plinth shall be of masonry or concrete and have a vertical step to a level of 250 mm above the floor of the chamber. The base of the test panel shall be completely in contact with the plinth and the face to be tested shall be flush with the edge. The two sources of fire shall be placed on the floor of the chamber with their longer dimension flush against the plinth and the face of the test panel. Both sources shall be lit simultaneously, and the time taken for the test shall start at this point. A.3.5 The performance of the panel shall be observed during the test and the time at which any significant change takes place recorded. After the sources of fire and any part of the panel which may have ignited have burnt out, the panel shall be examined and the extent of any damage photographed and measured. The opposite face of the panel shall not be tested until it and the floor of the chamber have cooled to below 25 °C. A.4 Test report A.4.1 The test procedure shall be described together with the timing of significant stages, indication of, for example maximum intensity of flames, the incidence of any observed changes to the test panel and the number of samples tested. The test report shall record the nature and extent of any flames and smoke produced during the test. A.4.2 Photographs of the test panel before, during and after the test shall be supplied and shall include an appropriate means of judging scale. SIST EN 1794-2:2011
EN 1794-2:2011 (E) 10 Annex B (normative)
Secondary safety: danger of falling debris B.1 General Noise reducing devices can be mounted on structures or in such a way that if damaged they could pose a hazard to road users or to others. In particular, even if the noise reducing device is protected by the safety system on an elevated structure, there is a possibility of pieces or whole panels from a noise barrier becoming detached as the result of a violent collision and for the debris to fall, endangering those below. Noise reducing devices which are to be used in a vulnerable position may be required to be restrained by internal or external linkage between panels and/or elements to prevent them from becoming detached and falling. The standard provides some general indications of factors which need to be considered and also provides a method of establishing the resistance of a product to a severe blow. NOTE It is principally the responsibility of specifiers to consider the potential consequences of a barrier becoming damaged and to provide protection accordingly. Alternatively, a means of catching falling pieces detached from vulnerable barriers may be specified for barrier systems which are not so restrained. B.2 Requirements B.2.1 Behaviour under impact Where it is known that any component of a device is liable to shatter if struck or shocked, this shall be clearly stated. NOTE Such a statement can be qualified by further evidence of the effectiveness of any restraining mechanism. B.2.2 Fastening of structural and acoustical elements B.2.2.1 A noise reducing device shall be assumed to be safety fastened if the elements are secured in such a way that they do not fall when they are deformed or broken. The restraint systems shall be designed to withstand the self weight of the relevant falling parts, multiplied by a load factor of 4. The wet self weight shall be used, calculated in accordance with EN 1794-1:2011, Annex B. B.2.2.2 If structural and acoustical elements of this category of noise reducing device are prevented from falling by a system of restraint linking them together, each link shall take the load of all adjoining elements. It shall be assumed that th
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