Road traffic noise reducing devices - Non-acoustic performance - Part 1: Mechanical performance and stability requirements

This European Standard specifies criteria to categorize road traffic noise reducing devices according to basic mechanical performance under standard conditions of exposure, irrespective of the materials used. A range of conditions and optional requirements is provided in order to take into account the wide diversity of practice in Europe. Individual aspects of performance are covered separately in the annexes. Safety considerations in the event of damage to noise reducing devices are covered in EN 1794-2.
This European Standard covers the current behaviour of the product. In order to assess its long term performances, EN 14389-2 should be used.
NOTE   The test procedure described in Annex A doesn't consider the fatigue effect.

Lärmschutzvorrichtungen an Straßen - Nichtakustische Eigenschaften - Teil 1: Mechanische Eigenschaften und Anforderungen an die Standsicherheit

Dispositifs de réduction du bruit du trafic routier - Performances non acoustiques - Partie 1 : Performances mécaniques et exigences en matière de stabilité

Protihrupne ovire za cestni promet - Neakustične lastnosti - 1. del: Mehanske lastnosti in zahteve za stabilnost

Ta evropski standard določa merila za kategorizacijo protihrupnih ovir za cestni promet v skladu z osnovnimi mehanskimi lastnostmi pod običajnimi pogoji izpostavljenosti, ne glede na uporabljene materiale. Zaradi upoštevanja različnih praks v evropskih državah so podani številni pogoji in izbirne zahteve. Posamezni vidiki delovanja so ločeno obravnavani v dodatkih. Varnostna tveganja v primeru poškodb protihrupnih ovir za cestni promet so obravnavana v standardu EN 1794-2.
Ta evropski standard zajema trenutno delovanje izdelka. Za ocenitev dolgoročnih lastnosti je treba uporabljati standard EN 14389-2.
OPOMBA: Preskusni postopek, opisan v dodatku A, ne upošteva učinka utrujenosti.

General Information

Status
Published
Publication Date
10-Jan-2019
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
04-Jan-2019
Due Date
11-Mar-2019
Completion Date
11-Jan-2019

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Lärmschutzvorrichtungen an Straßen - Nichtakustische Eigenschaften - Teil 1: Mechanische Eigenschaften und Anforderungen an die StandsicherheitDispositifs de réduction du bruit du trafic routier - Performances non acoustiques - Partie 1 : Performances mécaniques et exigences en matière de stabilitéRoad traffic noise reducing devices - Non-acoustic performance - Part 1: Mechanical performance and stability 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 1794-1:2018+AC:2018SIST EN 1794-1:2018+AC:2019en,fr,de01-februar-2019SIST EN 1794-1:2018+AC:2019SLOVENSKI

STANDARDSIST EN 1794-1:20181DGRPHãþD
SIST EN 1794-1:2018+AC:2019
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1794-1:2018+AC
December 2018 ICS 93.080.30 Supersedes EN 1794-1:2018
English Version

Road traffic noise reducing devices - Non-acoustic performance - Part 1: Mechanical performance and stability requirements

Dispositifs de réduction du bruit du trafic routier - Performances non acoustiques - Partie 1 : Performances mécaniques et exigences en matière de stabilité

Lärmschutzvorrichtungen an Straßen - Nichtakustische Eigenschaften - Teil 1: Mechanische Eigenschaften und Anforderungen an die Standsicherheit This European Standard was approved by CEN on 13 November 2017 and includes the Corrigendum issued by CEN on 19 December 2018.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Rue de la Science 23,

B-1040 Brussels © 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1794-1:2018+AC:2018 E SIST EN 1794-1:2018+AC:2019

EN 1794-1:2018+AC:2018 (E) Contents Page European foreword.................................................................................................................................................. 4 Introduction ............................................................................................................................................................... 5 1 Scope ............................................................................................................................................................... 6 2 Normative references ............................................................................................................................... 6 3 Terms and definitions .............................................................................................................................. 6 4 Symbols and abbreviations .................................................................................................................... 8 5 Performances .............................................................................................................................................. 8 5.1 General ........................................................................................................................................................... 8 5.2 Wind load and load due to passing vehicles ..................................................................................... 8 5.3 Self-weight .................................................................................................................................................... 9 5.4 Impact of stones .......................................................................................................................................... 9 5.5 Safety in collision ....................................................................................................................................... 9 5.6 Dynamic actions from snow clearance: equivalent static load.................................................. 9 6 Test report .................................................................................................................................................... 9 Annex A (normative)

Resistance against wind load and load from passing vehicles ................... 11 A.1 General ........................................................................................................................................................ 11 A.2 Assessment of the performance ......................................................................................................... 11 A.2.1 Structural elements ................................................................................................................................ 11 A.2.2 Acoustic elements ................................................................................................................................... 11 A.2.2.1 General ........................................................................................................................................................ 11 A.2.2.2 Assessment by testing ........................................................................................................................... 12 A.2.3 Test report ................................................................................................................................................. 14 A.2.4 Assessment of performance by calculation ................................................................................... 15 A.3 Performance of structural elements ................................................................................................ 15 A.4 Performance of acoustic elements .................................................................................................... 16 A.5 Self-supporting elements ..................................................................................................................... 17 A.6 NOTE to Annex A – examples of protocol of measurement (informative) .......................... 18 Annex B (normative)

Self-weight ..................................................................................................................... 20 B.1 General ........................................................................................................................................................ 20 B.2 Determination of self-weight .............................................................................................................. 20 B.2.1 Dry weight of acoustic elements ........................................................................................................ 20 B.2.2 Wet weight of acoustic elements ....................................................................................................... 20 B.2.3 Reduced wet weight ............................................................................................................................... 20 B.3 Mechanical requirements .................................................................................................................... 20 B.3.1 Structural elements ................................................................................................................................ 20 B.3.2 Acoustic elements under their own weight ................................................................................... 21 SIST EN 1794-1:2018+AC:2019

EN 1794-1:2018+AC:2018 (E) 3 B.3.3 Combined weight, wind and other static loads ............................................................................. 21 B.3.4 Fixing devices ............................................................................................................................................ 21 B.4 Calculation and test reports ................................................................................................................ 21 B.4.1 Assessment of performance by calculation .................................................................................... 21 B.4.2 Assessment of performance by testing ............................................................................................ 22 Annex C (normative)

Impact of stones ............................................................................................................ 23 C.1 General ........................................................................................................................................................ 23 C.2 Requirements ............................................................................................................................................ 23 C.3 Test method ............................................................................................................................................... 23 C.4 Test report ................................................................................................................................................. 24 Annex D (informative)

Safety in collision ...................................................................................................... 26 D.1 General ........................................................................................................................................................ 26 D.2 Testing and calculations ....................................................................................................................... 26 Annex E (normative)

Substitute load due to dynamic actions from snow clearance..................... 27 E.1 General ........................................................................................................................................................ 27 E.2 Requirements ............................................................................................................................................ 27 E.2.1 Magnitude and height of the load ...................................................................................................... 27 E.2.2 Mechanical requirements ..................................................................................................................... 27 E.3 Methods of assessment .......................................................................................................................... 28 E.3.1 Calculations ............................................................................................................................................... 28 E.3.2 Load test ...................................................................................................................................................... 28 E.4 Test report ................................................................................................................................................. 28 Bibliography ............................................................................................................................................................ 30

SIST EN 1794-1:2018+AC:2019

EN 1794-1:2018+AC:2018 (E) 4 European foreword This document (EN 1794-1:2018+AC:2018) 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 June 2019, and conflicting national standards shall be withdrawn at the latest by June 2019. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1794-1:2018. This document includes Corrigendum 1 to correct two symbols in A.4 a) 3) and A.4 b) 2). The start and finish of text introduced or altered by corrigendum is indicated in the text by tags ˜ ™. The main change compared to the previous edition concerns: — the Annex A, i.e.: the way to consider the resistance of the Noise Reducing Devices (NRD) to loads. The first version of this standard was written before the Eurocodes were published and, then, was specifying performances. This revised version of the standard now only states the methods of assessment of the maximum load the NRD can withstand without damage. Essentially the manufacturer now has the responsibility to declare the maximum load guarantee representative of its product performances, and to demonstrate those performances. On the other hand, facing previous problems with wrongly calculated performances of some acoustic elements, this new version of the standard requires that the assessment of the performances is now done mainly by testing. — the Annex D: the acceptance criteria given in the previous version of this standard have been deleted and this revised version of the standard now only refers to EN 1317-1 and EN 1317-2. 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 — Part 3: Reaction to fire — Burning behaviour of noise reducing devices and classification According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 1794-1:2018+AC:2019

EN 1794-1:2018+AC:2018 (E) 5 Introduction While performing their primary function, road traffic noise reducing devices are exposed to a range of forces due to wind, dynamic air pressure caused by passing traffic, and the self-weight of its component parts. They can also be subjected to shocks caused by stones or other debris thrown up by vehicle tyres and, in some countries, the dynamic force of snow ejected by equipment used to clear roads in winter. The deflections of a noise reducing device under such loads during its design life should not reduce its effectiveness. SIST EN 1794-1:2018+AC:2019

EN 1794-1:2018+AC:2018 (E) 6 1 Scope This European Standard specifies criteria to categorize road traffic noise reducing devices according to basic mechanical performance under standard conditions of exposure, irrespective of the materials used. A range of conditions and optional requirements is provided in order to take into account the wide diversity of practice in Europe. Individual aspects of performance are covered separately in the annexes. Safety considerations in the event of damage to noise reducing devices are covered in EN 1794-2. This European Standard covers the current behaviour of the product. In order to assess its long term performances, EN 14389-2 should be used. NOTE The test procedure described in Annex A doesn't consider the fatigue effect. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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 1317-1, Road restraint systems — Part 1: Terminology and general criteria for test methods EN 1317-2, Road restraint systems — Part 2: Performance classes, impact test acceptance criteria and test methods for safety barriers including vehicle parapets EN 1990, Eurocode — Basis of structural design 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — IEC Electropedia: available at http://www.electropedia.org/ — ISO Online browsing platform: available at http://www.iso.org/obp 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 and structural elements. 3.2 noise barrier noise reducing device, which obstructs the direct transmission of airborne sound emanating from road traffic 3.3 acoustic element element whose primary function is to provide the acoustic performance of the device SIST EN 1794-1:2018+AC:2019

EN 1794-1:2018+AC:2018 (E) 7 3.4 structural element element whose primary function is to support or hold in place acoustic elements 3.5 cladding noise-reducing device, which is attached to a wall or other structure and reduces the amount of sound reflected 3.6 cover noise-reducing device, which either spans or overhangs the road 3.7 added device additional component that influences the acoustic performance of the original noise-reducing device (acting primarily on the diffracted energy) 3.8 mechanical test apparatus device of the type used for measuring the elasticity of hard surfaces 3.9 test area central area of a full size panel enclosed by a margin of 125 mm from each edge Note 1 to entry: As shown in Figure C.2. 3.10 vehicle occupants safe device traffic safe noise reducing device for which a vehicle impact does not cause more danger to the occupants than allowed for safety barriers in EN 1317-2 3.11 combined safety and noise barrier traffic safe noise reducing device which fulfils all the requirements for safety barriers in a given containment class as defined in EN 1317-2 3.12 dynamic actions from snow clearance: equivalent static load load due to snow thrown against a noise reducing device by snow ploughing equipment 3.13 ploughing speed speed of the snow ploughing equipment as it passes the noise barrier 3.14 non-vertical noise barrier noise barrier or a part of it (e.g. cantilever) which has a vertical inclination more than 15° 3.15 maximum load maximum load (in kN/m2) that the sample can withstand with fulfilment of specified criteria SIST EN 1794-1:2018+AC:2019

EN 1794-1:2018+AC:2018 (E) 8 4 Symbols and abbreviations For the purposes of this document, the following symbols and abbreviations apply. h total height of the noise barrier, in millimetres L length of elements, in millimetres LS bearing length of structural element, in millimetres LA length of acoustic element, in millimetres Fsafe maximum load the element can withstand, declared by the manufacturer and tested, in kN/m2 Fd50 load that corresponds to a deflection of 50 mm, in kN/m2 FpermanentLA/500 load that corresponds to a permanent deflection of LA/500, in kN/m2 d deflection, in millimetres dhmax horizontal maximum deflection, in millimetres dvmax vertical maximum deflection, in millimetres dselfweight deflection of the sample in horizontal position under its own weight dsafe deflection after having applied the Fsafe load dpermanent permanent deflection after charge d50 deflection of 50 mm G partial factor for permanent actions, also accounting for model uncertainties and dimensional variations F partial factor for actions, also accounting for model uncertainties and dimensional variations

load factor SF safety factor 5 Performances 5.1 General Under any of the loads specified in this Clause 5, elements shall not become detached from their supports or fixings may not fail. The influence of inhomogeneity shall be considered in the relevant verifications according to the specific Eurocodes if existing. All failure modes and deformation which may cause transient or permanent disorders should be considered. These modes can affect the overall behaviour of the structure or the behaviour of some elements. 5.2 Wind load and load due to passing vehicles The manufacturer shall provide the result of the assessments done according the methods described in Annex A. SIST EN 1794-1:2018+AC:2019

EN 1794-1:2018+AC:2018 (E) 9 5.3 Self-weight The manufacturer shall provide the dry and wet (or reduced wet) weight according to Annex B. The manufacturer shall provide the vertical load the product can withstand under the self-weight, as calculated or tested in Annex B, in respect of the requirements specified in Annex B. 5.4 Impact of stones Damage caused by controlled impacts shall not exceed the criteria specified in Annex C. 5.5 Safety in collision When the functions of noise barrier and safety barrier are integrated in one system, the safety in collision shall be assessed in accordance with EN 1317-1 and EN 1317-2. See also informative Annex D. 5.6 Dynamic actions from snow clearance: equivalent static load The effects of dynamic forces from snow clearance shall be assessed in accordance with Annex E, where required or specified. 6 Test report A test report shall be produced containing the aspects of performance and shall include the following information: a) number and year of this European Standard, i.e. EN 1794-1:2018; b) full description of the test specimen including manufacturer's name and product identifier with sectional drawings and photographs showing mounting conditions; masses, densities, dimensions and specifications of panels, posts and seals, including any internal components; c) description of the method of sampling, if parts of manufactured elements are evaluated by testing; d) place and date of the 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. NOTE Table 1 gives an example of the data which can be reported on the CE mark. SIST EN 1794-1:2018+AC:2019

EN 1794-1:2018+AC:2018 (E) 10 Table 1 — Example of CE mark for characteristics evaluated according to this standard Dry and reduced wet self-weight of an acoustic element:

Dry weight: 0,70 kN
Reduced wet weight: 0,92 kN Resistance to loads
Structural elements
Normal (90°) load due to wind, static, external and self-weight:
Barrier height 3 m 5,2 kN/m
Barrier height 4 m 4,4 kN/m
Bending moment at ground level due to snow clearance: 15 kNm
Acoustic elements
Maximum vertical load (Annex B, B.3.2): 150 kN/m
a According to procedure a) Annex A
Fsafe 2,5 kN/m2
dsafe 20 mm
dmax for Fsafe .SF, with SF = 1,5 30 mm
b According to procedure b) Annex A
Fd50 3,0 kN/m2
dmax for Fd50 .SF, with SF = 1,5 60 mm

Normal (90°) load due to snow clearance the element can withstand: 14 kN a Test procedure when the sample under test cannot be charged up to a deflection of d = 50 mm. b Test procedure when the sample under test can be charged up to a deflection of d = 50 mm.

SIST EN 1794-1:2018+AC:2019
EN 1794-1:2018+AC:2018 (E) 11 Annex A (normative)

Resistance against wind load and load from passing vehicles A.1 General The objective of this annex is to provide assessment methods to demonstrate the capability of the product to withstand wind load and load from passing vehicles. The methods and criteria to assess the maximum load NRDs can withstand are provided within this annex. The methods for calculating the different loads that can act on NRDs are provided within Eurocode EN 1990 and Eurocode EN 1991. Requirements are set separately for acoustic and structural elements. In case acoustical and structural elements are not distinct, limits for structural elements apply. The temperature range, within limits of -40 °C to +70 °C, over which the requirements in A.3 to A.4 are met, shall be reported. NOTE In consideration of the various characteristics of the materials (inhomogeneity, creep, de-formations, ageing), an additional reduction of the bearing capacity may become necessary. A.2 Assessment of the performance A.2.1 Structural elements Structural elements are calculated according to the applicable Eurocodes. A.2.2 Acoustic elements A.2.2.1 General The acoustic elements shall be tested according to the following method. The load test shall be carried out on a representative sample which shall include an appropriate number of acoustic elements of the longest span for the element type, with posts or other supports similar to those used in practice. The supports shall be held in the horizontal plane and restrained from lateral movement and rotation. The supports may be propped if only the flexure of the acoustic elements is to be tested, otherwise the supports shall be fixed as in intended use. The test panel shall be allowed to reach equilibrium under laboratory conditions for at least 3 h before testing. Load tests shall be carried out at 20 °C. If the product is intended to be used at very low or very high temperatures, then the test may be repeated at -40 °C and/or +70 °C with appropriate conditioning time, if the material is regarded as being temperature sensitive. If the strength or stiffness of the load carrying material depends on temperature, the effect of temperature differing from range +10 to +30 shall be taken into consideration in testing if the intended temperature range is wider than presented above. Results shall show that temperature variation does not cause failure in the performance of joints (acoustic element detaches from posts in the lowest temperature of the specified range, connections (screw hole in the acoustic elements) allow for shrinkage and expansion in the whole range of temperatures specified by the manufacturer.

For NRD’s with asymmetrical design (geometry, characteristic of materials ...), the results could be different on each side. In this case, the tests must be performed on the weakest side. In case of a family of products, the weakest product of the family has to be tested. SIST EN 1794-1:2018+AC:2019

EN 1794-1:2018+AC:2018 (E) 12 A.2.2.2 Assessment by testing A.2.2.2.1 General Test shall be carried out in a horizontal arrangement as described under A.2.2.2.2 hereafter. The manufacturer fixes himself the Fsafe he will declare for his product as being the relevant capacity of his product to withstand loads: the following tests will be done in order to demonstrate this declared performance. In all cases, the applied loads do not exceed Fsafe. The maximum load to be considered for acoustic elements is 4 kN/m2 (for Fsafe or Fd50). A.2.2.2.2 Test procedure The sample to be tested shall be supported as described in A.2.2.1. The point of the acoustic element at which the vertical deflection will reach its maximum shall be determined and all measurements of deflection relative to a fixed datum level shall be taken at this point. After 30 min in this position, a deflection reading dselfweight shall be taken. When placed horizontally, the sample to be tested already supports a load corresponding to its self-weight. Additional loading shall then be simulated by an appropriate number of weights (e.g. small sand bags) that are uniformly distributed across the acoustic element. To prevent local damages of the acoustic

In any case, the total tested load F corresponds to the self-weight plus the additional loads. a) If the sample under test cannot be charged up to a deflection of d = 50 mm: The additional loading F is applied, that corresponds to Fsafe minus the self-weight of the acoustic element. After 30 min under this loading F, the deflection reading dsafe shall be taken. Then, the applied weights shall be carefully removed from the acoustic element and, after 30 min, the deflection reading shall be repeated. The difference between this last deflection and dselfweight shall be described as the permanent deflection dpermanent: its value must not exceed the maximum admissible permanent deformation LA/500. In case this permanent deflection dpermanent, after having released the load, exceeds the limit of LA/500, the test has to be redone (a new sample shall be used) with a reduced Fsafe load until the limit of LA/500 for dpermanent is no more exceeded: this load has to be declared as FpermanentLA/500 (in kN/m2). Afterwards, the same panel must be reloaded up to a total load of Fsafe . SF (including the self-weight). The manufacturer must report a value for SF equal or greater than1.5. After 30 min under this loading, the deflection reading shall be taken and this maximum deflection dmax is reported.

SIST EN 1794-1:2018+AC:2019
EN 1794-1:2018+AC:2018 (E) 13

Key F loading in kN/m2 d deflection in mm O horizontal support of the specimen, after 30 min, deflection reading for dselfweight 1 application of the additional load (Fsafe - self weight), after 30 min, deflection reading dsafe 2 removal of the additional load, after 30 min, deflection reading and calculation of dpermanent with subtraction of dselfweight.

dpermanent
...

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