ISO 12357-2:2007
(Main)Commercial road vehicles — Drawbar couplings and eyes for rigid drawbars — Part 2: Strength tests for special applications
Commercial road vehicles — Drawbar couplings and eyes for rigid drawbars — Part 2: Strength tests for special applications
ISO 12357-2:2007 lays down test conditions and strength requirements to be met by: drawbar couplings and corresponding drawbar eyes for rigid drawbars which are provided for use on rigid drawbar trailers with a maximum design total mass exceeding 3,5 tonnes and a vertical static load exceeding 10 % of their design total mass, and/or a vertical static load greater than 1 000 kg and up to 2 000 kg; drawbar couplings and corresponding drawbar eyes for use on vehicle transport combinations, provided for a technical mass exceeding 3,5 tonnes.
Véhicules routiers commerciaux — Pivot et anneaux pour barres d'attelage rigides — Partie 2: Essais de résistance pour applications spéciales
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 12357-2
First edition
2007-04-15
Commercial road vehicles — Drawbar
couplings and eyes for rigid drawbars —
Part 2:
Strength tests for special applications
Véhicules routiers commerciaux — Pivot et anneaux pour barres
d'attelage rigides —
Partie 2: Essais de résistance pour applications spéciales
Reference number
ISO 12357-2:2007(E)
©
ISO 2007
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ISO 12357-2:2007(E)
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ISO 12357-2:2007(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
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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 12357-2 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 15,
Interchangeability of components of commercial vehicles and buses.
ISO 12357 consists of the following parts, under the general title Commercial road vehicles — Drawbar
couplings and eyes for rigid drawbars:
⎯ Part 1: Strength tests for general cargo centre-axle trailers
⎯ Part 2: Strength tests for special applications
© ISO 2007 – All rights reserved iii
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INTERNATIONAL STANDARD ISO 12357-2:2007(E)
Commercial road vehicles — Drawbar couplings and eyes
for rigid drawbars —
Part 2:
Strength tests for special applications
1 Scope
This International Standard lays down test conditions and strength requirements to be met by:
a) Case A (see Figure 1 a): Drawbar couplings and corresponding drawbar eyes for rigid drawbars which
are provided for use on rigid drawbar trailers (see 3.2) with a maximum design total mass, C+S,
exceeding 3,5 tonnes and:
⎯ a vertical static load S (see 3.1) exceeding 10 % of their design total mass, and/or
⎯ a vertical static load S greater than 1 000 kg and up to 2 000 kg.
EXAMPLE Examples of couplings and corresponding drawbar eyes include drawbar couplings according to
ISO 3584 combined with drawbar eyes according to ISO 1102.
NOTE This International Standard does not apply if both values, 10 % and 1 000 kg, are not exceeded. Such towed
vehicles are defined as centre-axle trailers and are subject to ISO 12357-1.
b) Case B (see Figure 1 b): Drawbar couplings and corresponding drawbar eyes for use on vehicle transport
combinations, provided for a technical mass C exceeding 3,5 tonnes.
a) Case A
Figure 1 — Examples
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ISO 12357-2:2007(E)
b) Case B
Figure 1 (continued)
2 Normative references
The following referenced documents are indispensable for the application 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 1176, Road vehicles — Masses — Vocabulary and codes
UNECE Regulation R55-01
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
S-value
mass imposed vertically on the coupling under static conditions at rigid drawbar trailer/dolly loaded to its
maximum design total mass
3.2
rigid drawbar trailer
towed vehicle equipped with a towing device which cannot move vertically (in relation to the trailer), and in
which the axle(s) is(are) positioned less close to the centre of gravity of the vehicle (when uniformly loaded)
such that a vertical static load S exceeding 10 % of the load corresponding to the maximum design total mass
of the trailer and/or vertical static load S greater than 1 000 kg and up to 2 000 kg is transmitted to the towing
vehicle
4 General test requirements
4.1 The test may be carried out with drawbeams, drawbar couplings and drawbar eyes/special coupling
devices having corresponding functional dimensions.
4.2 The strength tests described in this International Standard are static and dynamic tests to be performed
on a test bed.
4.3 The fixing arrangements for the drawbar coupling/special coupling device and the drawbar eye/special
drawbar device on the test bed shall be those intended for their attachment to the vehicles in accordance with
the coupling manufacturer’s fitting instructions.
4.4 Drawbeams, drawbar couplings and drawbar eyes may be tested either separately or together. Special
coupling devices intended only for vehicle transport combinations (see class T defined in ECE R 55-01) are to
be tested together.
4.5 Preferably, couplings are tested in the original condition as being foreseen for u
...
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