prEN 14388

Road traffic noise reducing devices - Characteristics

This document specifies product characteristics for road traffic noise reducing devices (RTNRD) - as defined in 3.1 - to be used alongside roads to reduce the propagation of traffic noise away from the road environment.
The following types of road traffic noise reducing devices are covered by this document:
-   noise barriers (as defined in 3.4);
-   claddings (as defined in 3.5);
-   covers (as defined in 3.6); and
-   added devices (as defined in 3.7).
Road traffic noise reducing devices comprise acoustic elements (as defined in 3.2), structural elements (as defined in 3.3) or self-supporting elements (having both acoustic and structural functions).
This document identifies assessment and verification of constancy of performance (AVCP) of characteristics of road traffic noise reducing devices.
This document does not cover the following:
-   resistance of RTNRD to vandalism,
-   visual appearance of RTNRD, and
   acoustic properties of road pavements.

Lärmschutzvorrichtungen an Straßen - Merkmale

Dieses Dokument legt Produkteigenschaften von Lärmschutzvorrichtungen an Straßen (RTNRD, en: road traffic noise reducing devices), wie in 3.1 definiert, fest, die entlang von Straßen zu verwenden sind, um die Übertragung des vom Straßenverkehr ausgehenden Schalls auf die Straßenumgebung zu reduzieren.
Die folgenden Arten von Lärmschutzvorrichtungen an Straßen werden in diesem Dokument behandelt:
-   Lärmschutzwände (wie in 3.4 definiert);
-   Bekleidungen (wie in 3.5 definiert);
-   Überdeckungen (wie in 3.6 definiert); und
-   Wandaufsätze (wie in 3.7 definiert).
Lärmschutzvorrichtungen an Straßen umfassen akustische Elemente (wie in 3.2 definiert), tragende Elemente (wie in 3.3 definiert) oder selbsttragende Elemente (die sowohl akustische als auch tragende Funktionen aufweisen).
Dieses Dokument legt die Bewertung und Überprüfung der Leistungsbeständigkeit (AVCP, en: assessment and verification of constancy of performance) der Eigenschaften von Lärmschutzvorrichtungen an Straßen fest.
Dieses Dokument behandelt nicht:
-   die Beständigkeit von RTNRD gegenüber Vandalismus,
-   das äußere Erscheinungsbild von RTNRD, und
-   akustische Eigenschaften von Fahrbahnbelägen.

Dispositifs de réduction du bruit du trafic routier - Caractéristiques

Le présent document spécifie les caractéristiques des dispositifs de réduction du bruit du trafic routier (RTNRD) - tels que définis en 3.1 - à utiliser le long des routes pour réduire la propagation du bruit du trafic routier à distance de l’environnement routier.
Ce document traite des types de dispositifs de réduction du bruit du trafic routier suivants :
-   écrans acoustiques (tels que définis en 3.4) ;
-   parements (tels que définis en 3.5) ;
-   couvertures de chaussée (tels que définies en 3.6) ; et
-   dispositifs additionnels (tels que définis en 3.7).
Les dispositifs de réduction du bruit du trafic routier comprennent des éléments acoustiques (tels que définis en 3.2), des éléments structuraux (tels que définis en 3.3) ou des éléments autoporteurs (incluant des fonctions à la fois acoustiques et structurales).
Ce document identifie l’évaluation et la vérification de constance des performances (EVCP) des caractéristiques des dispositifs de réduction du bruit du trafic routier.
Ce document ne couvre pas les points suivants :
-   la résistance des RTNRD aux actes de vandalisme,
-   l’aspect visuel des RTNRD, et
-   les propriétés acoustiques des chaussées.

Protihrupne ovire za cestni promet - Značilnosti

General Information

• Status: Not Published
• Publication Date: 29-Nov-2023
• ICS: 93.080.30 - Road equipment and installations
• Technical Committee: CEN/TC 226 - Road equipment
• Drafting Committee: CEN/TC 226/WG 6 - Noise reducing devices
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Start Date: 23-Mar-2023
• Due Date: 01-Nov-2021
• Completion Date: 23-Mar-2023
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Mandate: M/111 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on circulation fixtures
• Ref Project: oSIST prEN 14388:2022 - Road traffic noise reducing devices - Characteristics

Relations

• Revises: EN 14388:2015 - Road traffic noise reducing devices - Specifications
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 14388:2022
01-februar-2022
Protihrupne ovire za cestni promet - Značilnosti
Road traffic noise reducing devices - Characteristics
Lärmschutzvorrichtungen an Straßen - Merkmale
Dispositifs de réduction du bruit du trafic routier - Caractéristiques
Ta slovenski standard je istoveten z: prEN 14388
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 14388:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 14388:2022
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oSIST prEN 14388:2022
DRAFT
EUROPEAN STANDARD
prEN 14388
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2021
ICS 93.080.30 Will supersede EN 14388:2015
English Version
Road traffic noise reducing devices - Characteristics

Dispositifs de réduction du bruit du trafic routier - Lärmschutzvorrichtungen an Straßen - Merkmale

Caractéristiques

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 14388:2021 E

worldwide for CEN national Members.
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oSIST prEN 14388:2022
prEN 14388:2021 (E)
Contents Page

European foreword ....................................................................................................................................... 3

1 Scope .................................................................................................................................................... 4

2 Normative references .................................................................................................................... 4

3 Terms and definitions ................................................................................................................... 5

4 Characteristics .................................................................................................................................. 6

4.1 Reaction to fire ................................................................................................................................. 6

4.2 Release of dangerous substances .............................................................................................. 6

4.3 Resistance to wind loads and loads from passing vehicles .............................................. 6

4.4 Resistance to loads under self-weight ..................................................................................... 7

4.5 Substitute load due to dynamic actions from snow clearance ........................................ 7

4.6 Resistance to dynamic loads from impact of stones ........................................................... 8

4.7 Resistance to dynamic loads: risk of falling debris ............................................................. 8

4.8 Safety in collision ............................................................................................................................. 9

4.9 Safety in case of brushwood fire ................................................................................................ 9

4.10 Light reflection ................................................................................................................................. 9

4.11 Transparency .................................................................................................................................. 10

4.12 Sound absorption in diffuse sound field conditions ......................................................... 10

4.13 Sound absorption in direct sound field conditions ........................................................... 11

4.14 Airborne sound insulation in diffuse sound field conditions ........................................ 11

4.15 Airborne sound insulation in direct sound field conditions ......................................... 11

4.16 Intrinsic sound diffraction ......................................................................................................... 11

4.17 Long-term performance .............................................................................................................. 12

5 Testing and assessment .............................................................................................................. 13

5.1 Reaction to fire ............................................................................................................................... 13

5.2 Release of dangerous substances ............................................................................................ 13

5.3 Resistance to wind loads and loads from passing vehicles ............................................ 13

5.4 Resistance to loads under self-weight ................................................................................... 13

5.5 Substitute load due to dynamic actions from snow clearance ...................................... 13

5.6 Resistance to dynamic loads from impact of stones ......................................................... 13

5.7 Resistance to dynamic loads: Risk of falling debris .......................................................... 13

5.8 Safety in collision ........................................................................................................................... 13

5.9 Safety in case of brushwood fire .............................................................................................. 13

5.10 Light reflection ............................................................................................................................... 13

5.11 Transparency .................................................................................................................................. 13

5.12 Sound absorption in diffuse sound field conditions ......................................................... 14

5.13 Sound absorption in direct sound field conditions ........................................................... 14

5.14 Airborne sound insulation in diffuse sound field conditions ........................................ 14

5.15 Airborne sound insulation in direct sound field conditions ......................................... 14

5.16 Intrinsic sound diffraction ......................................................................................................... 14

5.17 Long-term performance .............................................................................................................. 14

6 Assessment and verification of constancy of performance - AVCP ............................. 14

6.1 General .............................................................................................................................................. 14

6.2 Assessment of performance ...................................................................................................... 14

6.3 Verification of constancy of performance ............................................................................ 16

7 Product designation ..................................................................................................................... 17

Annex ZA (informative) Relationship of this European Standard with Regulation (EU)

No. 305/2011 .................................................................................................................................. 18

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European foreword

This document (prEN 14388:2021) 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 14388:2015.

This document has been prepared under a Standardization Request given to CEN by the European

Commission and the European Free Trade Association.

For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral

part of this document.

For information, EN 14388:2015 replaced EN 14388:2005 and EN 14388:2005/AC:2008, but it was

not cited in the EU Official Journal (OJEU).
The main changes in comparison with the previous edition include:
— a clarification of the Scope;
— an improved definition of a Road Traffic Noise Reducing Device;

— a revision of all the supporting standards methods according to this revision; and

— this document has been revised to be in line with the Construction Products Regulation.

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1 Scope

This document specifies product characteristics for road traffic noise reducing devices (RTNRD) - as

defined in 3.1 - to be used alongside roads to reduce the propagation of traffic noise away from the

road environment.

The following types of road traffic noise reducing devices are covered by this document:

— noise barriers (as defined in 3.4);
— claddings (as defined in 3.5);
— covers (as defined in 3.6); and
— added devices (as defined in 3.7).

Road traffic noise reducing devices comprise acoustic elements (as defined in 3.2), structural elements

(as defined in 3.3) or self-supporting elements (having both acoustic and structural functions).

This document identifies assessment and verification of constancy of performance (AVCP) of

characteristics of road traffic noise reducing devices.
This document does not cover the following:
— resistance of RTNRD to vandalism,
— visual appearance of RTNRD, and
— acoustic properties of road pavements.
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 1317-1:2010, Road restraint systems - Part 1: Terminology and general criteria for test methods

EN 1317-2:2010, Road restraint systems - Part 2: Performance classes, impact test acceptance criteria

and test methods for safety barriers including vehicle parapets

prEN 1793-1:2021 , Road traffic noise reducing devices - Test method for determining the acoustic

performance – Part 1: Intrinsic characteristics - Sound absorption under diffuse sound field conditions

prEN 1793-2:2021 , Road traffic noise reducing devices - Test method for determining the acoustic

performance – Part 2: Intrinsic characteristics - Airborne sound insulation under diffuse sound field

conditions

prEN 1793-4:2021 , Road traffic noise reducing devices - Test method for determining the acoustic

performance – Part 4: Intrinsic characteristics - Intrinsic sound diffraction
Under development.
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prEN 1793-5:2021 , Road traffic noise reducing devices - Test method for determining the acoustic

performance – Part 5: Intrinsic characteristics - Sound absorption under direct sound field conditions

prEN 1793-6:2021 , Road traffic noise reducing devices - Test method for determining the acoustic

performance – Part 6: Intrinsic characteristics - Airborne sound insulation under direct sound field

conditions

prEN 1794-1:2021, Road traffic noise reducing devices - Non-acoustic performance – Part 1: Methods of

determination of the mechanical and stability characteristics

prEN 1794-2:2021, Road traffic noise reducing devices - Non-acoustic performance – Part 2: Methods of

determination of the general safety and environmental characteristics

prEN 14389:2021, Road traffic noise reducing devices - Procedures for determining long-term

performance

EN 13501-1:2018, Fire classification of construction products and building elements - Part 1:

Classification using data from reaction to fire tests

CEN/TS 15447:2006, Mounting and fixing in reaction to fire tests under the Construction Products

Directive

CEN/TS 16637-2:2014, Construction products - Assessment of release of dangerous substances - Part 2:

Horizontal dynamic surface leaching test
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 https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
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 RTNRD may comprise acoustic elements (3.2) only or both structural (3.3) and acoustic

elements.

Note 2 to entry: Applications of RTNRD include noise barriers (3.4), claddings (3.5), covers (3.6) and added

devices(3.7).
3.2
acoustic element

element whose primary function is to provide the acoustic performance of the device

3.3
structural element
element whose primary function is to support or hold in place acoustic elements
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3.4
noise barrier

road traffic noise reducing device which obstructs the direct transmission of airborne sound

emanating from road traffic
3.5
cladding

road traffic noise reducing device which is attached to a wall or other structure and reduces the

amount of sound reflected
3.6
cover
road traffic noise reducing device which either spans or overhangs the road
3.7
added device

additional component that influences the acoustic performance of the original road traffic noise

reducing device
Note 1 to entry: The added device is acting primarily on the diffracted energy.
4 Characteristics
4.1 Reaction to fire
4.1.1 Determination

The performance of reaction to fire of RTNRD shall be determined according to 5.1.

4.1.2 Evaluation criteria

The reaction to fire performance of RTNRD for the claimed class shall be evaluated according to

5.1 considering the test methods specified in the standards referred therein.
4.2 Release of dangerous substances
4.2.1 Determination

The release of dangerous substances of RTNRD shall be determined according to 5.2.

4.2.2 Evaluation criteria

The release of dangerous substances of materials or components used in RTNRD shall be evaluated

according to 5.2 considering the test methods specified in the standards referred therein.

4.3 Resistance to wind loads and loads from passing vehicles
4.3.1 Determination

The performance of resistance to wind loads of RTNRD shall be determined according to 5.3.

4.3.2 Expression of performance
4.3.2.1 Structural elements
The length Ls of the element shall be specified.
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The performance of resistance to wind loads of structural elements shall be expressed as indication of

a value in kN/m related to the 4 following limits of deflection: L / 200, L / 150, L / 100, L / 75.

s s s s

EXAMPLE For a length Ls of 5m; 8, 7, 6, 5 kN/m for the corresponding limits of deflection Ls / 200, Ls /

150, Ls / 100, Ls / 75.

NOTE For each intended use, the relevant maximum deflection depends on characteristics such as type of

foundation, type of panels (e.g. brittle materials may require less deflection), etc.

4.3.2.2 Acoustic elements
The length L of the element and the Safety Factor SF shall be specified.

The performance of resistance to wind loads of acoustic elements shall be expressed as indication of:

— If the sample under test cannot be charged up to a deflection of d = 50 mm:

Normal (90°) load F with the deflection d and maximum deflection d under the load F

safe safe max safe
·SF
— IIf the sample under test can be charged up to a deflection of d = 50 mm:

Normal (90°) load F with the deflection of 50 mm and maximum deflection d under the load

d50 max
F ·SF
d50
Load values in kN/m and deflection values in mm.
EXAMPLE For a length Ls of 3,96 m and SF of 2,3; F = 1,6 kN/m and d = 35 mm.
safe max
4.4 Resistance to loads under self-weight
4.4.1 Determination

The performance of resistance to load under self-weight of RTNRD shall be determined according to

5.4.
4.4.2 Expression of performance

The performance of resistance to load under self-weight of RTNRD shall be expressed as indication of

a value in kN/m.
EXAMPLE 1 1,6 kN/m.

The dry self-weight, the wet self-weight and the reduced wet self-weight of an acoustic element shall

be expressed as indication of a value in kN.

EXAMPLE 2 Dry self-.weight: 0,5 kN; wet-self-weight: 0,9 kN; reduced wet self-weight: 0,6 kN

4.5 Substitute load due to dynamic actions from snow clearance
4.5.1 Determination

The performance of substitute load due to dynamic actions from snow clearance of RTNRD shall be

determined according to 5.5.
4.5.2 Expression of performance

The performance of substitute load due to dynamic actions from snow clearance of RTNRD shall be

expressed as indication of a value in kN/m .
EXAMPLE 1,6 kN/m .
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4.6 Resistance to dynamic loads from impact of stones
4.6.1 Determination

The performance of resistance to dynamic loads from impact of stones of RTNRD shall be determined

according to 5.6.
4.6.2 Evaluation criteria
The results obtained shall be evaluated against the criteria in Table 1:

Table 1 — Evaluation criteria for resistance to dynamic loads from impact of stones

Object of the evaluation Criteria
Outer parts of the construction No damage
Internal elements No damaged or displacement
Outer wall of hollow elements No penetration
Localised damage in the form of splits Not greater than 50 mm
Depth of any crater at the surface of brittle
Less than the thickness of the outer wall or
materials
20 mm, whichever is smaller
(craters: where fragments are broken out):
4.6.3 Expression of performance

If all criteria in 4.8.2 are met, the performance of resistance to dynamic loads from impact of stones of

RTNRD shall be expressed as indication of “stone resistant”.
4.7 Resistance to dynamic loads: risk of falling debris
4.7.1 Determination

The performance of resistance to dynamic loads from impacts of RTNRD shall be determined

according to 5.7.
4.7.2 Evaluation criteria
The results obtained shall be evaluated against the criteria in Table 2:

Table 2 — Evaluation criteria for resistance to dynamic loads : risk of falling debris

Object of the evaluation Criteria
Free pieces None: if any, see below
Free pieces weighting more than 0,400 kg None
Not longer than 15 cm, and area not

Free pieces weighting more than 0,100 kg greater than 25 cm , and with angles of

less than 15°, and not thinner than 1mm
4.7.3 Expression of performance
The performance shall be expressed as a level according to Table 3:
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Table 3 — Expression of performance for resistance to dynamic loads : risk of falling debris

Level Test energy , kJ Criteria
4 6,0 No free pieces
3 6,0 Free pieces meeting all the criteria of table 2
2 0,5 No free pieces
1 0,5 Free pieces meeting all the criteria of table 2
See 5.7.
4.8 Safety in collision
4.8.1 Determination

When the functions of noise barrier and safety barrier are integrated in one system, the safety in

collision shall be shall be determined according to 5.8.
4.8.2 Evaluation criteria

The safety in collision of RTNRD shall be evaluated according to 5.8 considering the test methods

specified in the standards referred therein.
4.9 Safety in case of brushwood fire
4.9.1 Determination

The safety in case of brushwood fire shall be shall be determined according to 5.9.

4.9.2 Expression of performance

The results of tests for brushwood fire shall be evaluated according to criteria in Table 4, and the

performance expressed as a class specified therein.
Table 4 — Expression of performance for safety in case of brushwood fire
Level Criteria

1 the panel has been damaged to a greater extent than as defined for levels 2 and 3

2 the damaged area above either source is less than 0,06 m and 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
3 no damage other than discoloration
4.10 Light reflection
4.10.1 Determination

The performance of light reflection of RTNRD shall be determined according to 5.10.

4.10.2 Expression of performance

The results of light reflection shall be evaluated according to criteria in Table 5, and the performance

expressed as a level specified therein.
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Table 5 — Expression of performance for light reflection
Level Criteria
1 Gloss > 80
2 40 ≤ Gloss ≤ 80
3 Gloss < 40
4.11 Transparency
4.11.1 Static Transparency
4.11.1.1 Determination
The performance of static transparency shall be determined according to 5.11.
4.11.1.2 Expression of performance

The performance of static transparency shall be expressed as a percentage for the view angles to the

normal to the plane of the RTNRD recommended in EN 1794-2:2021.
EXAMPLE See Table 6:
Table 6 — Example of declaration of performance for static transparency
View angle to the plane of the RTNRD Static transparency
0° 90 %
45° 60 %
4.11.2 Dynamic Transparency
4.11.2.1 Determination
The performance of dynamic transparency shall be determined according to 5.11.
4.11.2.2 Expression of performance

The performance of dynamic transparency shall be expressed as a percentage for the view angles to

the normal to the plane of the RTNRD recommended in prEN 1794-2:2021.
EXAMPLE See Table 7:
Table 7 — Example of declaration of performance for dynamic transparency
View angle to the plane of the RTNRD Dynamic transparency
15° 80%
30° 70%
4.12 Sound absorption in diffuse sound field conditions
4.12.1 Determination

The performance of sound absorption of RTNRD in diffuse sound field conditions shall be determined

according to 5.12.
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4.12.2 Expression of performance

The performance of sound absorption of RTNRD in diffuse sound field conditions shall be expressed

as indication of a single number rating , DL , in decibel.
α,NRD
EXAMPLE DL = 8,3 dB.
α,NRD
4.13 Sound absorption in direct sound field conditions
4.13.1 Determination

The performance of sound absorption of RTNRD in direct sound field conditions shall be determined

according to 5.13.
4.13.2 Expression of performance

The performance of sound absorption of RTNRD in direct sound field conditions shall be expressed as

indication of a single number rating , DL , in decibel.
EXAMPLE DL = 5,6 dB.
4.14 Airborne sound insulation in diffuse sound field conditions
4.14.1 Determination

The performance of airborne sound insulation of RTNRD in diffuse sound field conditions shall be

determined according to 5.14.
4.14.2 Expression of performance

The performance of airborne sound insulation of RTNRD in diffuse sound field conditions shall be

expressed as indication of a single number rating , DL , in decibel.
EXAMPLE DL = 25,3 dB.
4.15 Airborne sound insulation in direct sound field conditions
4.15.1 Determination

The performance of airborne sound insulation of RTNRD in direct sound field conditions shall be

determined according to 5.15.
4.15.2 Expression of performance

The performance of airborne sound insulation of RTNRD in direct sound field conditions shall be

expressed as indication of the following 3 single number ratings: DL for acoustic elements, DL

SI,E SI,P
across post and the global DL , in decibel.
SI,G
EXAMPLE DLSI,E = 28,1 dB, DLSI,P= 23,2 dB, and DLSI,G = 25,0 dB.
4.16 Intrinsic sound diffraction
4.16.1 Determination

The performance of intrinsic sound diffraction of RTNRD shall be determined according to 5.16.

4.16.2 Expression of performance

The performance of intrinsic sound diffraction of RTNRD shall be expressed as indication of the

following single number ratings of sound diffraction index difference:
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When tested in laboratory: DL and DL in decibel.
ΔDI,refl ΔDI,abs
EXAMPLE: DL = 1,2 dB, and DL = 2,0 dB.
ΔDI, refl ΔDI, abs
When tested in-situ: DL , in decibel.
ΔDI,situ
EXAMPLE: DLΔDI, situ = 1,3 dB.
4.17 Long-term performance
4.17.1 Determination
The long-term performance of RTNRD shall be determined according to 5.17.
4.17.2 Expression of performance

The long-term performance of RTNRD shall be expressed as values of the declared working life in

years and the acoustic performances at the end of the working life for each class of exposure as listed

in Table 8.

When the working life determined for structural elements and acoustic elements are different, the

lowest value shall be considered as the long-term performance.
Table 8 — Expression of long-term performance
DL at the DL at the DL at the DL at the
α,NRD RI SI,E SI,P
Class of Declared end of end of end of end of
exposure working life declared declared declared declared
working life working life working life working life
a b b b
4B1 40 years NPD 4,1 24,1 22,2
a b b b
4B2 25 years NPD 5,2 28,2 26,1
a b b b
4C2 40 years NPD 3,1 22,1 20,2
a b b b
4C3 30 years NPD 7,2 35,2 33,1
a b b b
4C4 20 years NPD 1,1 20,1 18,2
a b b b
4K2 20 years NPD 2,2 10,2 8,1
a b b b
4K3 15 years NPD … … …
4M3 NPD NPD NPD NPD NPD
a b b b
4M4 30 years NPD … … …
a b b b
4S2 40 years NPD … … …
a b b b
4Z6 30 years NPD … … …
a b b b
4Z7 5 years NPD … … …
The declared working life does apply as long as the measures described in the
manufacturer’s manual are being fulfilled.

all those values are just to put values in the table but they have no relation to any product,

neither they are meaningful values.
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5 Testing and assessment
5.1 Reaction to fire

The reaction to fire performance of RTNRD shall be determined according to the method(s) specified

in standards referred in EN 13501-1:2018.

When relevant, the mounting and fixing provisions rules for testing shall be in accordance to

CEN/TS 15447:2006.
5.2 Release of dangerous substances

The release of dangerous substances to soil, surface water and groundwater shall be determined for

materials or components used in RTNRD according to CEN/TS 16637-2:2014, Clause 9.

5.3 Resistance to wind loads and loads from passing vehicles

The performance of resistance to wind loads and loads from passing vehicles of RTNRD shall be

determined according to prEN 1794-1:2021, Annex A.
5.4 Resistance to loads under self-weight

The performance of resistance to self-weight of RTNRD shall be determined according to

prEN 1794-1:2021, Annex B.
5.5 Substitute load due to dynamic actions from snow clearance

The performance of Substitute load due to dynamic actions from snow clearance of RTNRD shall be

determined according to prEN 1794-1:2021, Annex E.
5.6 Resistance to dynamic loads from impact of stones

The performance of resistance to dynamic loads from impact of stones of RTNRD shall be determined

according to prEN 1794-1:2021, Annex C.
5.7 Resistance to dynamic loads: Risk of falling debris

The performance of resistance to dynamic loads from impact of impacts (Risk of falling debris) of

RTNRD shall be determined according to prEN 1794-2:2021, Annex B.
5.8 Safety in collision
The performance of s
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