EN 1794-1:2024

SLOVENSKI STANDARD
oSIST prEN 1794-1:2022
01-februar-2022
Protihrupne ovire za cestni promet - Neakustične lastnosti - 1. del: Metode
določanja stabilnosti in mehanskih značilnosti
Road traffic noise reducing devices - Non-acoustic performance - Part 1: Methods of
determination of the mechanical and stability characteristics
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
Ta slovenski standard je istoveten z: prEN 1794-1
ICS:
17.140.30 Emisija hrupa transportnih Noise emitted by means of
sredstev transport
93.080.30 Cestna oprema in pomožne Road equipment and
naprave installations
oSIST prEN 1794-1:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 1794-1:2022
oSIST prEN 1794-1:2022
DRAFT
EUROPEAN STANDARD
prEN 1794-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2021
ICS 93.080.30 Will supersede EN 1794-1:2018+AC:2018
English Version
Road traffic noise reducing devices - Non-acoustic
performance - Part 1: Methods of determination of the
mechanical and stability characteristics
Dispositifs de réduction du bruit du trafic routier - Lärmschutzvorrichtungen an Straßen - Nichtakustische
Performances non acoustiques - Partie 1 : Eigenschaften - Teil 1: Mechanische Eigenschaften und
Performances mécaniques et exigences en matière de Anforderungen an die Standsicherheit
stabilité
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 226.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1794-1:2021 E
worldwide for CEN national Members.

oSIST prEN 1794-1:2022
prEN 1794-1:2021 (E)
Contents Page
European foreword. 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms, definitions and symbols . 5
3.1 Terms and definitions . 5
3.2 Symbols . 7
4 Characteristics . 7
4.1 General . 7
4.2 Wind load and load due to passing vehicles . 7
4.3 Resistance to self-weight . 8
4.4 Impact of stones . 8
4.5 Safety in collision . 8
4.6 Substitute load due to dynamic actions from snow clearance. 8
5 Test report . 8
Annex A (normative) Resistance against wind load and load from passing vehicles . 9
Annex B (normative) Resistance to loads under self-weight .17
Annex C (normative) Impact of stones .20
Annex D (informative) Safety in collision .23
Annex E (normative) Substitute load due to dynamic actions from snow clearance .24
Annex F (normative) Report template .27
Bibliography .28

oSIST prEN 1794-1:2022
prEN 1794-1:2021 (E)
European foreword
This document (prEN 1794-1:2021) has been prepared by Technical Committee CEN /TC 226 "Road
equipment", the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1794-1:2017.
The main change compared to the previous edition is the following:
— The Annexes A to D: the acceptance criteria given in the previous version of this standard have
been transferred to EN 14388:2021.
EN 1794 consists of the following parts under the general title "Road traffic noise reducing devices —
Non-acoustic performance":
— Part 1: Methods of determination of the mechanical and stability characteristics
— Part 2: Methods of determination of the general safety and environmental characteristics

oSIST prEN 1794-1:2022
prEN 1794-1:2021 (E)
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.
oSIST prEN 1794-1:2022
prEN 1794-1:2021 (E)
1 Scope
This document specifies criteria to categorize road traffic noise reducing devices according to basic
mechanical characteristics 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 road noise reducing devices are covered in
prEN 1794-2.
This document covers the current behaviour of the product. For the assessment of its long term
characteristics, EN 14389-2 is applicable.
NOTE The test procedure described in Annex A does not 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
3 Terms, definitions and symbols
3.1 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 https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1.1
road traffic noise reducing device
RTNRD
device designed to reduce the propagation of traffic noise away from the road environment
Note 1 to entry: The NRD may comprise acoustic elements (3.1.2) only or both structural (3.1.3) and acoustic
elements.
Note 2 to entry: Applications of NRD include noise barriers (3.1.4), claddings(3.1.5), covers (3.1.6) and added
devices (3.1.7).
3.1.2
acoustic element
element whose primary function is to provide the acoustic characteristic of the device
3.1.3
structural element
element whose primary function is to support or hold in place acoustic elements
oSIST prEN 1794-1:2022
prEN 1794-1:2021 (E)
3.1.4
noise barrier
noise reducing device which obstructs the direct transmission of airborne sound emanating from road
traffic
3.1.5
cladding
noise-reducing device which is attached to a wall or other structure and reduces the amount of sound
reflected
3.1.6
cover
noise-reducing device which either spans or overhangs the road
3.1.7
added device
additional component that influences the acoustic characteristic of the original noise-reducing device
Note 1 to entry: The added device is acting primarily on the diffracted energy.
3.1.8
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.
3.1.9
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
3.1.10
combined safety and noise barrier
traffic safe road noise reducing device which fulfils all the requirements for safety barriers in a given
containment class as defined in EN 1317-2
3.1.11
substitute load due to dynamic actions from snow clearance
load due to snow thrown against a noise reducing device by snow ploughing equipment
3.1.12
ploughing speed
speed of the snow ploughing equipment as it passes the noise barrier
3.1.13
non-vertical noise barrier
noise barrier or a part of it (e.g. cantilever) which has a vertical inclination more than 15°
3.1.14
maximum load
maximum load (in kN/m ) that the sample can withstand with fulfilment of specified criteria
oSIST prEN 1794-1:2022
prEN 1794-1:2021 (E)
3.2 Symbols
For the purposes of this document, the following symbols apply.
h total height of the noise barrier, in millimetres
L length of elements, in millimetres
L bearing length of structural element, in millimetres
S
L length of acoustic element, in millimetres
A
F maximum load the element can withstand, declared by the manufacturer and
safe
tested, in kN/m
F load that corresponds to a deflection of 50 mm, in kN/m
d50
F load that corresponds to a permanent deflection of L /500, in kN/m
permanent A
L /500
A
d deflection, in millimetres
d horizontal maximum deflection, in millimetres
hmax
d vertical maximum deflection, in millimetres
vmax
d deflection of the sample in horizontal position under its own weight
selfweight
d deflection after having applied the F load
safe safe
d permanent deflection after charge
permanent
d deflection of 50 mm
γ partial factor for permanent actions, also accounting for model uncertainties
G
and dimensional variations
γ partial factor for actions, also accounting for model uncertainties and
F
dimensional variations
γ load factor
SF safety factor
4 Characteristics
4.1 General
Under any of the loads specified in this Clause 4, it shall be reported whether elements become
detached from their supports or fixings fail.
The influence of inhomogeneity shall be considered in the relevant verifications according to the
specific Eurocodes.
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.
4.2 Wind load and load due to passing vehicles
The manufacturer shall provide the result of the assessments done according to the methods described
in Annex A.
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prEN 1794-1:2021 (E)
4.3 Resistance to 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, with reference to the requirements specified in Annex B.
4.4 Impact of stones
Damage caused by controlled impacts shall be tested in accordance with Annex C.
4.5 Safety in collision
When the functions of noise barrier and safety barrier are integrated in one syste
...