EN 1794-1:2018+AC:2018

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

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
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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

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

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
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

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.
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

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.
EN 1794-1:201
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