EN ISO 22074-4:2024

SLOVENSKI STANDARD
01-maj-2024
Železniška infrastruktura - Sistemi za pritrjevanje tirnic - 4. del: Preskusne metode
za določanje odpornosti na ponavljajoče se obremenitve (ISO 22074-4:2022)
Railway infrastructure - Rail fastening systems - Part 4: Test methods for resistance to
repeated loading (ISO 22074-4:2022)
Bahninfrastruktur - Schienenbefestigungssysteme - Teil 4: Prüfverfahren bei
wiederkehrenden Belastungen (ISO 22074-4:2022)
Infrastructure ferroviaire - Systèmes de fixation du rail - Partie 4: Méthode d'essai pour la
détermination de résistance aux charges répétitives (ISO 22074-4:2022)
Ta slovenski standard je istoveten z: EN ISO 22074-4:2024
ICS:
45.080 Tračnice in železniški deli Rails and railway
components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 22074-4
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2024
EUROPÄISCHE NORM
ICS 45.080
English Version
Railway infrastructure - Rail fastening systems - Part 4:
Test methods for resistance to repeated loading (ISO
22074-4:2022)
Infrastructure ferroviaire - Systèmes de fixation du rail Bahninfrastruktur - Schienenbefestigungssysteme -
- Partie 4: Méthode d'essai pour la détermination de Teil 4: Prüfverfahren bei wiederkehrenden
résistance aux charges répétitives (ISO 22074-4:2022) Belastungen (ISO 22074-4:2022)
This European Standard was approved by CEN on 23 March 2024.

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, 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, Türkiye 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 22074-4:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 22074-4:2022 has been prepared by Technical Committee ISO/TC 269 “Railway
applications” of the International Organization for Standardization (ISO) and has been taken over as
which is held by DIN.
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 September 2024, and conflicting national standards
shall be withdrawn at the latest by September 2024.
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.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: 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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 22074-4:2022 has been approved by CEN as EN ISO 22074-4:2024 without any
modification.
INTERNATIONAL ISO
STANDARD 22074-4
First edition
2022-08
Railway infrastructure — Rail
fastening systems —
Part 4:
Test methods for resistance to
repeated loading
Infrastructure ferroviaire — Systèmes de fixation du rail —
Partie 4: Méthode d'essai pour la détermination de résistance aux
charges répétitives
Reference number
ISO 22074-4:2022(E)
ISO 22074-4:2022(E)
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 22074-4:2022(E)
Contents Page
Foreword .iv
1 S c op e . 1
2 Nor m at i ve r ef er enc e s . 1
3 Terms and definitions . 1
4 S y mb ol s . 2
5 Te s t pr o c e du r e .3
5.1 G eneral principle . 3
5 . 2 A pp a r at u s . 4
5 . 2 .1 R a i l . 4
5 . 2 . 2 Ac t u at or . 4
5.2.3 L oad application head . 4
5.2.4 Displacement measuring instruments . 4
5.2.5 Force measuring instruments . 5
5 . 3 Te s t s p e c i men s. 5
5.3.1 Sleeper or other rail support . 5
5 . 3 . 2 Fas t en i n g . 5
5.4 P rocedure for one rail . 5
5.4.1 G eneral . 5
5.4.2 P reparation for test . 5
5 .4 . 3 C la mpi n g f or ce . 6
5.4.4 L ongitudinal rail restraint. 6
5.4.5 V ertical static stiffness of fastening assembly . 6
5.4.6 C yclic loading . 7
5 .4 .7 R ep e at t e s t s . . 11
5 .4 . 8 F i n a l i n s p e c t ion . 11
5.5 P rocedure for two rails . 11
5.5.1 G eneral . 11
5 . 5 . 2 App a r at u s . 11
5 . 5 . 3 P r o ce du r e .12
6 Te s t r ep or t .13
Bibliography .15
iii
ISO 22074-4:2022(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 269, Railway applications, Subcommittee
SC 1, Infrastructure.
A list of all parts in the ISO 22074 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
INTERNATIONAL STANDARD ISO 22074-4:2022(E)
Railway infrastructure — Rail fastening systems —
Part 4:
Test methods for resistance to repeated loading
1 S cope
This document specifies a laboratory test procedure for applying repeated load cycles which generate
displacement cycles representative of the displacements caused by traffic on railway track. It is used
for assessing the long-term performance of rail fastening systems.
This document is applicable to surface mounted rail on sleepers, bearers and slab track and embedded
rail.
This test procedure applies to a complete fastening assembly.
2 Normat ive 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.
ISO 22074-1, Railway infrastructure — Rail fastening systems — Part 1: Vocabulary
ISO 22074-2, Railway infrastructure — Rail fastening systems — Part 2: Test method for longitudinal rail
restraint
ISO 22074-7, Railway infrastructure — Rail fastening systems — Part 7: Test method for clamping force
and uplift stiffness
ISO 22074-8:2022, Railway infrastructure — Rail fastening systems — Part 8: Test method for vertical
stiffness
ISO 7500-1:2018, Metallic materials — Calibration and verification of static uniaxial testing machines —
Part 1: Tension/compression testing machines — Calibration and verification of the force-measuring system
ISO 9513, Metallic materials — Calibration of extensometer systems used in uniaxial testing
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 22074-1 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
performance requirement
requirement relating to applied loading and pass/fail criteria identified before the test is carried out
Note 1 to entry: These requirements can be set out in a client's technical specification or in standards such as the
EN 13481 series or EN 17319.
ISO 22074-4:2022(E)
4 Symbols
For the purposes of this document, the following symbols apply.
α angle between the load line and a line normal to the datum surface of the rails °
F longitudinal restraint i.e. maximum axial longitudinal load on the rail without non-elas- kN
tic displacement occurring
F force applied to the assembly in measurement of static stiffness of the assembly kN
SAmax
F lower limit of force for determining the static stiffness of assembly kN
SA1
F upper limit of force for determining the static stiffness of assembly kN
SA2
P maximum load applied by the actuator during the repeated load test kN
max
P minimum load applied by the actuator during the repeated load test kN
min
P component of force parallel to the datum surface of the rails kN
L
P component of force normal to the datum surface of the rails kN
V
X position of the line of application of P below the centre of curvature of the gauge corner mm
L
of the rail head as shown in Figure 1
P
L
NOTE 1  =tan α
P
V
NOTE 2 Datum surface is defined in ISO 22074-1.
ISO 22074-4:2022(E)
Key
1 centre of gauge corner radius
2 centre line of the rail profile
3 line of load application
Figure 1 — Position of load application
5 Test procedure
5.1 General principle
A constant amplitude, cyclic force is applied at a predetermined load line and position on the rail head.
The magnitude, inclination and point of application of the load to be used are determined from the
stiffness of the fastening assembly, axle loads and curve conditions of the track for which the fastening
assembly is being tested.
A constant amplitude, cyclic force is applied by a single actuator.
Performance is determined by the change in clamping force, longitudinal rail restraint, vertical stiffness
and rail position, and visual inspection of the components during test.
If the test conditions are dependent on the dynamic low frequency stiffness of the fastening system, it
shall be measured before the repeated load test procedure set out in 5.4 or 5.5, following the procedure
of ISO 22074-8:2022, 7.2.
NOTE For the reference test method described in Clause 5, guidance on the derivation of loads and loading
geometry is included in CEN/TR 17320.
ISO 22074-4:2022(E)
5.2 Apparatus
5.2.1 Rail
Short lengths of rail (approximately 0,5 m per rail seat or longer if required), of the section for which
the fastening assembly und
...