1、BS EN 1794-3:2016Road traffic noise reducingdevices Non-acousticperformancePart 3: Reaction to fire Burningbehaviour of noise reducing devices andclassificationBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN 1794-3:2016 BRITISH STANDARDNational forewordThis Bri
2、tish Standard is the UK implementation of EN 1794-3:2016.The UK participation in its preparation was entrusted to TechnicalCommittee B/509/6, Fences for the attenuation of noise.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not
3、 purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 85401 9ICS 13.220.40; 93.080.30Compliance with a British Standard cannot confer immunity froml
4、egal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 1794-3:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1794-3 July 2016 ICS
5、13.220.40; 93.080.30 English Version Road traffic noise reducing devices - Non-acoustic performance - Part 3: Reaction to fire - Burning behaviour of noise reducing devices and classification Dispositifs de rduction du bruit du trafic routier - Performance non acoustique - Partie 3: Raction au feu -
6、 Comportement au feu des dispositifs de rduction du bruit et classification Lrmschutzvorrichtungen an Straen - Nichtakustische Eigenschaften - Teil 3: Brandverhalten - Brennverhalten von Lrmschutzvorrichtungen und Klassifizierung This European Standard was approved by CEN on 15 April 2016. CEN membe
7、rs 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 applicatio
8、n 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 Manageme
9、nt 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, L
10、ithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17,
11、 B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1794-3:2016 EBS EN 1794-3:2016EN 1794-3:2016 (E) 2 Contents Page European foreword 3 Introduction . 4 1 Scope . 5 2 Normative references . 5 3 Terms and definiti
12、ons 5 4 Symbols and abbreviations 6 5 Test methods and classification 6 5.1 Resistance to brushwood fire 6 5.1.1 General . 6 5.1.2 Classification 7 5.1.3 Fire test 7 5.2 Reaction to fire, smoke density and toxic fumes 8 5.2.1 Principles of the tests for reaction to fire 8 5.2.2 Suitability of a nois
13、e reducing device for testing and preparation 8 5.2.3 Smoke density and toxic fumes . 9 6 Report 11 6.1 General 11 6.2 Resistance to brushwood fire . 11 6.3 Reaction to fire, smoke density and toxic fumes . 11 Annex A (informative) Classification of reaction to fire for noise reducing devices . 12 B
14、ibliography 13 BS EN 1794-3:2016EN 1794-3:2016 (E) 3 European foreword This document (EN 1794-3:2016) 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 pu
15、blication of an identical text or by endorsement, at the latest by January 2017, and conflicting national standards shall be withdrawn at the latest by January 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENEL
16、EC shall not be held responsible for identifying any or all such patent rights. This European Standard, Road traffic noise reducing devices Non-acoustic performance, is part of a series composed of the following: Part 1: Mechanical performance and stability requirements; Part 2: General safety and e
17、nvironmental requirements; Part 3: Reaction to fire Burning behaviour of noise reducing devices and classification. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulg
18、aria, 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, Tu
19、rkey and the United Kingdom. BS EN 1794-3:2016EN 1794-3:2016 (E) 4 Introduction It is necessary to understand how different materials react to fire and what happens if it burns because this situation could have adverse effects on environment and human life and cause in special situations great conse
20、quences in economic or social aspects. In general, the brushfire test gives enough information for most applications for noise reducing devices. In case where more stringent requirements are necessary, further testing for reaction to fire will be done according to EN 13501-1. This European Standard
21、also contains indications for smoke hazard; density and toxic fumes, because this could create dangerous situations for the traffic and nearby living people. Test for smoke density and toxic fumes are necessary in all cases. The European Standard for classification, the EN 13501 series, is clear in
22、its classification. This European Standard defines specific tests to classify products and for Noise Reducing Devices. This European Standard give more information about how to prepare specimen and supporting constructions if they are needed in a way that this product can be tested according to the
23、specific standards mentioned in the EN 13501 series. BS EN 1794-3:2016EN 1794-3:2016 (E) 5 1 Scope This European Standard is to give authorities, designers and specifiers information with respect to reaction to fire, smoke density and toxic fumes of materials used in noise reducing devices. The comb
24、ination of brushwood fire test, smoke density test and test for toxic fumes give in general enough safety information. This European Standard gives also information if more stringent requirements are requested for situations with a higher level of safety. For noise reducing devices, this European St
25、andard gives a method how to handle substantial components of non-homogeneous products (as defined in EN 13501-1 and ISO/DIS 5659-2:2016) and how to handle non-homogeneous products and in which cases the influence of non-substantial components on the total result of the classification may be neglect
26、ed. The following effects will be taken into account: ignitability, burning droplets, smoke growth rate, smoke density, toxic fumes. The European Commission Decision 96/603/EC establish the list of products belonging to Classes A No contribution to fire . The materials, and products made from them,
27、that are listed in the Annex to this Decision, will, on account of their low level of combustibility and subject to the conditions also set out in the Annex, be classified in Classes A1 and Class A1FLas provided for in Tables 1 and 2 of the Annex to Decision 2000/147/EC. For the purpose of this clas
28、sification, no reaction-to-fire testing of those materials and products made from them is required. The products considered having no contribution to fire are excluded from this standard. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document
29、 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. EN 1363-1:2012: Fire resistance tests Part 1: General Requirements EN 13501-1:2007+A1:2009, Fire
30、 classification of construction products and building elements Part 1: Classification using data from reaction to fire tests EN 13823, Reaction to fire tests for building products - Building products excluding floorings exposed to the thermal attack by a single burning item EN ISO 11925-2, Reaction
31、to fire tests Ignitability of products subjected to direct impingement of flame Part 2: Single-flame source test (ISO 11925-2) ISO/DIS 5659-2:2016, Plastics Smoke generation Part 2: Determination of optical density by a single-chamber test 3 Terms and definitions For the purposes of this document, t
32、he following terms and definitions apply. 3.1 noise reducing device NRD device that is designed to reduce the propagation of traffic noise away from the road environment Note 1 to entry: This may be a noise barrier, cladding, a road cover or an added device. These devices may include both acoustic a
33、nd structural elements. BS EN 1794-3:2016EN 1794-3:2016 (E) 6 3.2 noise barrier noise reducing device that obstructs the direct transmission of airborne sound emanating from road traffic 3.3 acoustic elements elements whose primary function is to provide the acoustic performance of the device 3.4 st
34、ructural elements elements whose primary function is to support or hold in place acoustic elements 3.5 cladding noise reducing device that is attached to a wall or other structure to reduce the amount of sound reflected 3.6 cover noise reducing device which either spans or overhangs the highway 3.7
35、added device added component that influences the acoustic performance of the original noise-reducing device (acting primarily on the diffracted energy) 3.8 toxic fumes content of CO, HCN, HCl and NOxmeasured value after 10 min in g/g 3.9 product range of noise reducing devices range of products with
36、 the same composition and properties but that only differ in thickness and/or colours 4 Symbols and abbreviations Ds,max10imaximum smoke density during 10 min of test of material i Ds,max10totalmaximum smoke density during 10 min of test of the cladding or acoustic element wt,iweight of the material
37、 i wt,totaltotal weight of all material(s) part(s) of the cladding or acoustic element 5 Test methods and classification 5.1 Resistance to brushwood fire 5.1.1 General A noise reducing device can be exposed to fire are from dry vegetation or other material in close proximity. More severe fires from
38、spilt fuel can arise as the result of traffic accidents. BS EN 1794-3:2016EN 1794-3:2016 (E) 7 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 rec
39、ommended 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 clause is not applicable to such fire resistant material. This clause describes a test for a representative panel of a vertical noise
40、 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
41、covers over the highway. 5.1.2 Classification The noise reducing device, after being tested by the method given in 5.1.3, 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 i
42、s 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. 5.1.3 Fire test Acoustic elements of at least 2 m long by 1,5 m high shall be tested by exposure to
43、localized sources of fire at its base next to the front and rear faces independently. Panels shall be free of absorbed water before testing. For wood elements, the moisture content shall be reduced to a value below 18 % by an appropriate drying method. Other materials will be stabilized at an atmosp
44、here of 50 % RH and 23 C according to EN 1363-1:2012, F.1. 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 s
45、ections, shall be measured and noted on a sketch at 1:20 scale. 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 th
46、e test. 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. 5.1.3.1 Two identical sources of fire shall be prepared as
47、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 bask
48、et, 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 acclimatized at 20 C a
49、nd 65 % relative humidity until its weight is constant. BS EN 1794-3:2016EN 1794-3:2016 (E) 8 600 g of shavings shall be lightly pressed down into each basket so that it is just filled. 5.1.3.2 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 a
