1、April 2011 Translation by DIN-Sprachendienst.English price group 13No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、93.080.30!$nwu“1758482www.din.deDDIN EN 1794-2Road traffic noise reducing devices Non-acoustic performance Part 2: General safety and environmental requirementsEnglish translation of DIN EN 1794-2:2011-04Lrmschutzeinrichtungen an Straen Nichtakustische Eigenschaften Teil 2: Allgemeine Sicherheits- u
3、nd UmweltanforderungenEnglische bersetzung von DIN EN 1794-2:2011-04Dispositifs de rduction du bruit du trafic routier Performances non acoustiques Partie 2: Exigences gnrales pour la scurit et lenvironnementTraduction anglaise de DIN EN 1794-2:2011-04SupersedesDIN EN 1794-2:2003-07See start of appl
4、icationwww.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.03.11 28DIN EN 1794-2:2011-04 A comma is used as the decimal marker. Start of application The start of application of this standard is 1 April 2011. National foreword This stan
5、dard has been prepared by Technical Committee CEN/TC 226 “Road equipment” (Secretariat: AFNOR, France), Working Group WG 6 “Noise reducing devices” (lead-management: NBN, Belgium). The responsible German body involved in its preparation was the Normenausschuss Bauwesen (Building and Civil Engineerin
6、g Standards Committee), Working Committee NA 005-10-26 AA Lrmschutzeinrichtungen. Amendments This standard differs from DIN EN 1794-2:2003-07 as follows: a) Table B.1 “Classification” has been revised (two classes have been deleted ; )b) Annex E “Light reflection” has been revised; c) Annex F “Trans
7、parency” has been extended. Previous editions DIN EN 1794-2: 1998-10, 2003-07 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE 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
8、environmental requirements Dispositifs de rduction du bruit du trafic routier - Performances non acoustiques - Partie 2: Exigences gnrales pour la scurit et lenvironnement Lrmschutzeinrichtungen an Straen - Nichtakustische Eigenschaften - Teil 2: Allgemeine Sicherheits- und Umweltanforderungen This
9、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 referen
10、ces 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 m
11、ember 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, Icela
12、nd, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue
13、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: EEN 1794-2:2011 (E) 2 Contents Foreword 3Introduction . 41 Scope 52 Normative references 53 Terms, definitions and symbols . 53.1 Terms an
14、d definitions . 53.2 Symbols 54 Requirements . 64.1 Resistance to brush fire 64.2 Secondary safety (falling debris) . 64.3 Environmental protection . 64.4 Means of escape in emergency 64.5 Reflection of light. 64.6 Transparency . 75 Test report 7Annex A (normative) Resistance to brushwood fire 8Anne
15、x 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 26DIN EN 1794-2:2011-04 Page EN 1794-2:2011
16、(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 th
17、e 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 s
18、uch 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 environmenta
19、l 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 th
20、e 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
21、, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. DIN EN 1794-2:2011-04 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 lar
22、ge. 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 re
23、flect 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 operati
24、ves 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. DIN EN 1794-2:2011-04 EN 179
25、4-2:2011 (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 considera
26、tion 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 foll
27、owing 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-a
28、coustic 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 definiti
29、ons 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 red
30、uce 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 pe
31、rformance of the device 3.2 Symbols mangle at which reflections from the surface of the transparent material obscure the view through the material, in degrees; 0 angle between the visual axis and the normal to the noise reducing device (see Figure F.2), in degrees; n angle of transparency (see Figur
32、e F.2), in degrees; DIN EN 1794-2:2011-04 EN 1794-2:2011 (E) 6 nangle of opacity (see Figure F.2), in degrees; KAvisual acuity factor (see Figure F.3), in degrees; LTlight transmission index (as determined in accordance with EN 410 or EN 2155-5), in percent; SOarea of opaque features within transpar
33、ent elements, in square millimetres; STtotal area of transparent elements, including horizontal features, in square millimetres; T transparency, in percent; Trtransparency looking right, in percent; Tltransparency looking left, in percent; TDdynamic transparency, in percent; TSstatic transparency, i
34、n 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)
35、 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 shal
36、l 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 fo
37、r 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. DIN EN 1794-2:2011-04 EN 1794-2
38、: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
39、 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 elem
40、ents 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
41、. 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. DIN EN 1794-2:2011-04 EN 1794-2:2011 (E) 8 Annex A (normative) Resistance to brushwood fire A.1 General A noise reducing
42、 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 tha
43、t 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 mate
44、rial. 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
45、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 defin
46、ed for classes 2 and 3; class 2: if the damaged area above either source is less than 0,06 m2and 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 Acoust
47、ic 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 % b
48、y 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
49、 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. DIN EN 1794-2:2011-04 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 wi
