ISO/DIS 22074-7

Railway infrastructure -- Rail fastening systems

Infrastructure ferroviaire -- Systèmes de fixation du rail

Standards Content (sample)

DRAFT INTERNATIONAL STANDARD
ISO/DIS 22074-7
ISO/TC 269/SC 1 Secretariat: AFNOR
Voting begins on: Voting terminates on:
2020-10-05 2020-12-28
Railway infrastructure — Rail fastening systems —
Part 7:
Test method for clamping force and uplift stiffness
Infrastructure ferroviaire — Systèmes de fixation du rail —

Partie 7: Méthode d'essai pour la détermination de l'effort d'application au patin du rail et la rigidité au

soulèvement
ICS: 45.080
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ISO/DIS 22074-7:2020(E)
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ISO/DIS 22074-7:2020(E)
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ISO/DIS 22074-7:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

3.1 Terms and definitions ....................................................................................................................................................................... 1

3.2 Symbols ......................................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 2

5 Apparatus ..................................................................................................................................................................................................................... 2

5.1 Rail ..................................................................................................................................................................................................................... 2

5.2 Loading device......................................................................................................................................................................................... 2

5.3 Measuring and recording instruments............................................................................................................................... 2

5.4 Calibration .................................................................................................................................................................................................. 2

5.5 Steel shims .................................................................................................................................................................................................. 2

6 Test specimens........................................................................................................................................................................................................ 2

6.1 Sleeper, bearer or concrete block ............................................................................................................................................ 2

6.2 Fastening components ..................................................................................................................................................................... 3

7 Test procedure (Reference Method) ................................................................................................................................................ 3

7.1 Preparation for test ............................................................................................................................................................................. 3

7.2 Loading and measurement for assemblies incorporating a rail pad ........................................................ 3

7.3 Loading and measurement for assemblies not incorporating a rail pad .............................................. 3

7.4 Determination of uplift stiffness .............................................................................................................................................. 3

7.5 Testing with two baseplated fastening assemblies ................................................................................................. 3

8 Test procedure (Alternative Method) ............................................................................................................................................. 5

8.1 Preparation for test ............................................................................................................................................................................. 5

8.2 Loading and measurement for assemblies incorporating a rail pad ........................................................ 6

8.3 Loading and measurement for assemblies not incorporating a rail pad .............................................. 6

9 Test report ................................................................................................................................................................................................................... 7

© ISO 2020 – All rights reserved iii
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ISO/DIS 22074-7:2020(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

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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).

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patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

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on the ISO list of patent declarations received (see www .iso .org/ patents).

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iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 269, Railway applications, Subcommittee

SC 01, 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 © ISO 2020 – All rights reserved
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ISO/DIS 22074-7:2020(E)
Introduction

This standard specifies the procedure to be used to measure the clamping force applied by a rail

fastening system in laboratory conditions. It also describes a method for determining uplift stiffness- a

parameter required as an input for calculations of Track-Bridge Interaction.
© ISO 2020 – All rights reserved v
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DRAFT INTERNATIONAL STANDARD ISO/DIS 22074-7:2020(E)
Railway infrastructure — Rail fastening systems —
Part 7:
Test method for clamping force and uplift stiffness
1 Scope

This International Standard specifies the laboratory test procedure for determining the clamping force

exerted by the fastening system on the foot of the rail by measuring the force to separate the rail foot

from its immediate support. When required, the procedure is also used to determine the uplift stiffness

of the fastening system. It is applicable to systems with and without baseplates on all types of sleepers,

bearers or elements of ballastless track. The test does not determine the security of the fastening

components fixed into the sleeper or other fastening system support.

This test procedure applies to a complete fastening assembly. It is not applicable to fastening systems

for embedded rail or other fastening systems which do not act on the foot of the rail.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendme
...