1、ICS 93.080.30Blendschutzzune fr Straen Teil 1: Anforderungen undEigenschaften (enthlt nderung A1 : 2003)European Standard EN 12676-1 : 2000 + Amendment A1 : 2003 has the status of aDIN Standard.A comma is used as the decimal marker.National forewordThis standard has been prepared by CEN/TC 226 Road
2、equipment (Secretariat: France).The responsible German body involved in its preparation was the Normenausschuss Bauwesen (Buildingand Civil Engineering Standards Committee), Technical Committee 10.06.07 Sonstige Produkte derStraenausstattung.The DIN Standards corresponding to the International Stand
3、ards referred to in clause 2 of the EN are asfollows:ISO 1043-1 DIN EN ISO 1043-1ISO 1043-2 DIN ISO 1043-2ISO 9227 DIN 50021AmendmentsThis standard differs from the June 2000 edition as follows:a) More detailed requirements for optical effectiveness have been specified (cf. subclause 4.5.1).b) Speci
4、fications for evaluation of conformity have been included (cf. clause 6).c) Annex ZA has been included.Previous editionDIN EN 12676-1: 2000-06.National Annex NAStandards referred to(and not included in Normative references)DIN 50021 Corrosion testing Spray tests with different sodium chloride soluti
5、onsDIN EN ISO 1043-1 Plastics Symbols and abbreviated terms Part 1: Basic polymers and their specialcharacteristics (ISO 1043-1 : 1997)Ref. No. DIN EN 12676-1 : 2003-08English price group 12 Sales No. 111212.03DEUTSCHE NORMEN 12676-1EN comprises 21 pages. No part of this standard may be reproduced w
6、ithout the 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).Anti-glare screens for roadsPart 1: Performance and characteristics(includes Amendment A1:2003)English version of D
7、IN EN 12676-1:2000 + A1:2003August 2003SupersedesJune 2000 edition.English versionICS 93.080.30 Supersedes EN 12676-1 : 2000.Management Centre: rue de Stassart 36, B-1050 BrusselsEuropean Committee for StandardizationComit Europen de NormalisationEuropisches Komitee fr Normung 2003. CEN All rights o
8、f exploitation in any form and by any meansreserved worldwide for CEN national members.Ref. No. EN 12676-1 : 2000 + A1 : 2003 EEcrans anti-blouissement routiers Partie 1: Performances et caractris-tiques (amendement A1 : 2003 inclus)Blendschutzzune fr Straen Teil 1:Anforderungen und Eigenschaften(en
9、thlt nderung A1 : 2003)This European Standard was approved by CEN on 2000-02-18 and AmendmentA1 on 2003-01-09.CEN members are bound to comply with the CEN/CENELEC Internal Regulationswhich stipulate the conditions for giving this European Standard the status of anational standard without any alterat
10、ion.Up-to-date lists and bibliographical references concerning such national stand-ards may be obtained on application to the Management Centre or to any CENmember.The European Standards exist in three official versions (English, French, German).A version in any other language made by translation un
11、der the responsibility of aCEN member into its own language and notified to the Management Centre hasthe same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, the CzechRepublic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland,Ireland, Ita
12、ly, Luxembourg, Malta, the Netherlands, Norway, Portugal, Slovakia,Spain, Sweden, Switzerland, and the United Kingdom.Anti-glare screens for roadsPart 1: Performance and characteristics(includes Amendment A1 : 2003)EN 12676-1March 2000+ A1April 2003Page 2EN 12676-1 : 2000 + A1 : 2003ContentsPageFore
13、word to EN 12676-1 : 2000 . 2Foreword to EN 12676-1 : 2000/A1 : 2003. 2Introduction 31 Scope 32 Normative references 33 Definitions and symbols 44 Requirements 45 Marking. 76 Evaluation of conformity 9Annex A (informative) Method for calculation of the effective height 12Annex ZA (informative) Claus
14、es of this European Standard addressing the provisionsof the EU Construction Products Directive18Foreword to EN 12676-1 : 2000This European Standard has been prepared by Technical Committee CEN/TC 226 Road equipment, the Sec-retariat of which is held by AFNOR.This European Standard shall be given th
15、e status of a national standard, either by publication of an identicaltext or by endorsement, and conflicting national standards withdrawn, by September 2000 at the latest.In accordance with the CEN/CENELEC Internal Regulations, the national standards organizations of the follow-ing countries are bo
16、und to implement this European Standard:Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom.This European Standard consists of the following Parts un
17、der the general title Anti-glare screens for roads: Part 1: Performance and characteristics Part 2: Test methodsForeword to EN 12676-1 : 2000/A1 : 2003This amendment to EN 12676-1 : 2000 has been prepared by Technical Committee CEN/TC 226 Road equip-ment, the Secretariat of which is held by AFNOR.Th
18、is European Standard has been prepared under a mandate given to CEN by the European Commission andthe European Free Trade Association, and supports essential requirements of the relevant EU Directive. Forrelationship with this directive, see Annex ZA.This amendment shall be given the status of a nat
19、ional standard, either by publication of an identical text or byendorsement, by October 2003 at the latest, and conflicting national standards shall be withdrawn, by January2005 at the latest.In accordance with the CEN/CENELEC Internal Regulations, the national standards organizations of the follow-
20、ing countries are bound to implement this European Standard:Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,Italy, Luxembourg, Malta, the Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland, and theUnited Kingdom.Page 3EN 126
21、76-1 : 2000 + A1 : 2003IntroductionAnti-glare screens consist of manufactured equipment which reduces the glare of approaching headlights or ofother external light sources.Anti-glare screens are generally installed on public roads when it is considered beneficial to reduce the effect ofglare. Common
22、 situations where anti-glare screens may be used are as follows:a) in the central reservation of dual carriageway roads and motorways;b) between parallel or converging roads where traffic is travelling in opposing directions;c) glaring light sources reflecting on installations and buildings adjacent
23、 to the road;d) glaring light from installations and buildings adjacent to the road.Test methods for checking compliance with the performance requirements of this standard are given inEN 12676-2.1 ScopeThis Part of EN 12676 specifies the characteristics of an anti-glare screen in terms of its optica
24、l effectivenessand of the mechanical performance of its elements. It gives a method for the determination of the optical per-formance of anti-glare screens by calculation. Requirements and recommendations for the design of anti-glarescreens to minimize maintenance are also given.This Part of EN 1267
25、6 does not apply to: types of anti-glare screens other than those attached to safety barriers; regulatory characteristics which might be required to ensure that anti-glare screens are compatible withroad signs; specific requirements resulting from extreme environmental conditions experienced in some
26、 Europeancountries.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 amendm
27、ents to or revisions of any of these publications apply to this Part ofEN 12676 only when incorporated in it by amendment or revision. For undated references, the latest edition ofthe publication referred to applies.EN 1317-2 Road restraint systems Part 2: Performance classes, impact test acceptance
28、 criteria andtest methods for safety barriersEN 12676-2 Anti-glare screens for roads Part 2: Test methodsISO 1043-1 : 2001 Plastics Symbols and abbreviated Part 1: Basic polymers with their special characteris-ticsISO 1043-2 : 2000 Plastics Symbols Part 2: Fillers and reinforcing materialsISO 1459 :
29、 1973 Metallic coatings Protection against corrosion by hot dip galvanizing Guiding principlesISO 1461 : 1999 Hot dip galvanized coatings on fabricated iron and steel articles Specifications and testmethodsPage 4EN 12676-1 : 2000 + A1 : 20033 Definitions and symbolsFor the purposes of this Part of E
30、N 12676, the following definitions apply:3.1 Occluding elementElement of the anti-glare screen blocking out light which would be distracting to road users.3.2 SupportElement onto which occluding elements are mounted.3.3 BaseStructure (safety barrier) to which the support is attached.3.4 Fixing eleme
31、ntComponent (e.g. screw and nut) that enables the fastening of the occluding elements onto the support, or thesupport onto its base.NOTE: The fixing elements of the anti-glare screen are part of the system.3.5 Light transmission factor, Ctithe proportion of incident light which passes through the an
32、ti-glare screen at a particular angle of incidence i.3.6 Limiting angle, lAngle of incidence below which incident light is completely blocked out by the anti-glare screen (Cti= 0).4 Requirements4.1 Design and fixationThe anti-glare screen design shall consist of occluding elements which are mounted
33、on a support (figure 1) ordirectly on the base. Anti-glare screens shall only be fixed in the lower part and shall be designed to be com-patible with safety barriers fulfilling the requirements of EN 1317-2.The complete fixed anti-glare screen, or parts of it, even fixing elements, may not project o
34、ver the edge of thesafety barrier. Nevertheless, it is allowed that the plastic parts of an anti-glare screen fixed on a concrete bar-rier may project up to 100 mm beyond the edge of the upper part of the barrier.4.2 MaintenanceHollow bodies shall be closed at the top in order to prevent any dirt, s
35、now and water from penetrating intothem and also to prevent birds from nesting inside.Anti-glare screens shall be designed in such a way to enable the replacement of any section of the systemwithout having to remove adjacent parts in any way.NOTE: Anti-glare screens should only require attention if
36、damaged by vehicle impact or by other unusuallysevere conditions. During its functional lifetime, it should resist minor impacts from stones.Page 5EN 12676-1 : 2000 + A1 : 20034.3 CharacteristicsIf accessibility is required, it shall fall into one of the two following categories.Category 1: designed
37、 to permit at any place the passage of personnel carrying stretchers from one side of thebase to the other without the need to remove a section of the anti-glare system.Category 2: not designed to permit access at any place, but requiring a section of the anti-glare system to beremoved to permit acc
38、ess.NOTE: This design may be appropriate in areas, such as urban areas, where it is desirable to prevent pedestri-ans climbing over the base. This category of anti-glare screens should permit sections to be removed byemergency service personnel.4.4 Durability4.4.1 Synthetic materialsThe durability o
39、f the synthetic materials shall be verified by testing the impact strength of specimens before andafter ageing in accordance with EN 12676-2. When new, the relative difference between the values of tensileimpact strength obtained at temperatures of (23 3) C and (30 3) C shall not exceed 15 %. After
40、ageing,the tensile impact test values shall be more than 80 % of their initial values for each of the tested specimens at(23 3) C and at (30 3) C.Only ductile fractures are acceptable.4.4.2 Metallic elementsMetallic elements of the anti-glare screen shall be made of, or coated with, corrosion resist
41、ant materials. Dura-bility shall be assessed in accordance with EN 12676-2. Parts which are made of, or coated with, syntheticmaterials shall be aged by the process described in EN 12676-2 before being tested. Hot-dip galvanized steelcomponents shall conform to ISO 1459 and ISO 1461.4.5 Effectivenes
42、s with respect to glare4.5.1 GeneralThe anti-glare screen shall reduce the level of light that would otherwise dazzle road users, as described below.It shall be effective over its full height, i.e. from the upper edge of the base on which it is mounted. However, amaximum gap of 20 mm is admissible b
43、etween the upper edge of the base and the bottom edge of the supportor of the occluding elements.Two types of products are distinguished: those designed in order to “block out all the incident rays”. They have to comply with the geometricalcondition tan l 0,33. This condition is to be checked by cal
44、culation (4.5.2); those which do not comply with the condition tan l 0,33, designed in order to “block out partially theincident rays”. They have to fulfil the threshold value indicated in 4.5.3. This characteristic is to be de-termined by testing (4.5.3).NOTE: The height of the anti-glare screen de
45、pends on general conditions, such as the relative levels of vehicleheadlights and the eyes of the drivers in the opposing traffic directions. The main factors to be consideredare the height of these above the road and their distance to the anti-glare screens. However, it might not bepossible in ever
46、y situation to completely eliminate the effect of glare because of conflicting road geometry.Annex A provides examples of the heights of anti-glare screens needed to block out light for a number oftypical cases.Page 6EN 12676-1 : 2000 + A1 : 20034.5.2 Verification by calculationBecause of the way th
47、ey are constructed, some systems totally block out the incident rays up to a limit anglel. For elements perpendicular to the axis of installation, this angle may be found by calculating its tangentusing the following equation:tan l= DLwhere:D is the distance between two occluding elements;L is the w
48、idth of an occluding element.If L is not constant, it shall be obtained by dividing the surface area resulting from the projection of an occlud-ing element on a vertical plane perpendicular to the direction of the axis of installation of the system, by theheight of the occluding element (see figure
49、2).If tan lis not less than 0,33, verification in accordance with 4.5.3 is not necessary.4.5.3 Verification by testingThis verification is be made where tan lis less than 0,33.The level of screening produced by the anti-glare system for an angle of incidence i is given by the transmis-sion factor Ctiwhere i is the angle between the axis of the system and the direction of the incident ray.Ctishall be determined in accordance with EN 12676-2.The maximum acceptable values of Ctishall be as follows:a) fo
