ISO 7641:2012

Road vehicles — Trailers up to 3,5 t — Calculation of the mechanical strength of steel drawbars

ISO 7641:2012 gives a simplified procedure for the calculation of the mechanical strength of steel drawbars, whether there are welds or not, for centre-axle trailers Categories O1 and O2 as specified in the UNECE, Consolidated Resolution on the Construction of Vehicles (R.E.3). Consequently, it only applies to simple constructions that enable a calculation in bending.

Véhicules routiers — Remorques jusqu'à 3,5 t — Calcul de la résistance mécanique des timons en acier

General Information

• Status: Published
• Publication Date: 18-Nov-2012
• ICS: 43.040.70 - Couplings
• Technical Committee: ISO/TC 22/SC 40 - Specific aspects for light and heavy commercial vehicles, busses and trailers
• Drafting Committee: ISO/TC 22/SC 40 - Specific aspects for light and heavy commercial vehicles, busses and trailers
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 23-Oct-2023

Relations

• Revises: ISO 7641-1:1983 - Road vehicles — Caravans and light trailers — Calculation of the mechanical strength of the drawbar — Part 1: Steel drawbars
• Effective Date: 14-Aug-2008

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 7641
First edition
2012-11-15
Road vehicles — Trailers up to 3,5 t —
Calculation of the mechanical strength
of steel drawbars
Véhicules routiers — Remorques jusqu’à 3,5 t — Calcul de la
résistance mécanique des timons en acier
Reference number
ISO 7641:2012(E)
©
ISO 2012

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ISO 7641:2012(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any
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ii © ISO 2012 – All rights reserved

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ISO 7641:2012(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 1
3.1 Terms and definitions . 1
3.2 Symbols . 2
4 Requirements . 3
4.1 Maximum of the vertical static force “S” . 3
4.2 Material and weldability of the drawbars . 3
4.3 Strength calculation . 3
Annex A (informative) Examples of configurations . 7
Bibliography .14
© ISO 2012 – All rights reserved iii

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ISO 7641:2012(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
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.
ISO 7641 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 4, Exterior
fittings of car/traile
...