Tractors for agriculture and forestry -- Roll-over protective structures on narrow tractors

This document specifies procedures for both the static and dynamic strength testing of roll-over protective structures (ROPS) front-mounted on narrow tractors. It defines the clearance zone and acceptance conditions for rigid or tiltable, front, two-post ROPS, including any associated rear fixtures, and is applicable to tractors so equipped having the following characteristics: —   a ground clearance of not more than 600 mm beneath the lowest points of the front- and rear-axle housings (not considering lower points on the axle differential); —   a fixed or adjustable minimum track width of one of the two axles of less than 1 150 mm; NOTE It is understood that the axle mounted with the wider tyres is set at a track width of not more than 1 150 mm. Tyre track width is adjustable so that the outer edges of the narrower tyres do not extend beyond the outer edges of the tyres of the other axle. Where the two axles are fitted with rims and tyres of the same size, the fixed or adjustable track width of the two axles is less than 1 150 mm. —   a mass greater than 400 kg but less than 3 500 kg, unballasted, including the ROPS and tyres of the largest size recommended by the manufacturer; —   fitted with roll-over protective structures of the dual-pillar type mounted only in front of the seat index point (SIP) and characterised by a reduced clearance zone attributable to the tractor silhouette. This document also specifies optional testing procedures for both seat anchorage points and folding efforts of front-mounted ROPS designed to fold.

Tracteurs agricoles et forestiers -- Structures de protection contre le retournement (ROPS) pour tracteurs à voie étroite

Le présent document spécifie des modes opératoires d’essai de résistance statique et dynamique des structures de protection contre le retournement (ROPS) pour des tracteurs à voie étroite montées à l’avant. Il définit la zone de dégagement et les conditions d’acceptation des structures de protection contre le retournement (ROPS) à deux montants, rigides ou inclinables, montées à l’avant, y compris tout élément arrière associé. Il est applicable aux tracteurs ainsi équipés, présentant les caractéristiques suivantes: —   garde au sol inférieure ou égale à 600 mm, au-dessous des points les plus bas de l’essieu avant et de l’essieu arrière, à l’exception des points inférieurs sur le différentiel de l’essieu; —   largeur de voie minimale fixe ou réglable de l’un des deux essieux inférieure à 1 150 mm; NOTE Il est entendu que l’essieu monté avec les pneumatiques les plus larges est réglé à une largeur de voie inférieure ou égale à 1 150 mm. La largeur de voie des pneumatiques est réglable de sorte que les bords extrêmes des pneumatiques les plus étroits ne dépassent pas les bords extrêmes des pneumatiques de l’autre essieu. Lorsque les deux essieux sont équipés de jantes et de pneumatiques de même taille, la largeur de voie fixe ou réglable des deux essieux est inférieure à 1 150 mm. —   masse d’un tracteur non lesté, supérieure à 400 kg, mais inférieure à 3 500 kg, mais en comptant la ROPS et la plus grande taille de pneumatiques recommandée par le constructeur; —   structures de protection contre le retournement du type à deux montants montées uniquement devant le point repère du siège (SIP) et caractérisées par une zone de dégagement réduite attribuable à la silhouette du tracteur. Le présent document spécifie également des modes opératoires d’essais facultatifs pour les points d’ancrage du siège et les efforts de pliage de la ROPS montée à l’avant conçue pour se plier.

General Information

Status
Published
Publication Date
10-Jun-2021
Technical Committee
Current Stage
5060 - Close of voting Proof returned by Secretariat
Start Date
11-May-2021
Completion Date
11-May-2021
Ref Project

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INTERNATIONAL ISO
STANDARD 12003-1
Third edition
2021-06
Tractors for agriculture and
forestry — Roll-over protective
structures on narrow tractors —
Part 1:
Front-mounted ROPS
Tracteurs agricoles et forestiers — Structures de protection contre le
retournement (ROPS) pour tracteurs à voie étroite —
Partie 1: ROPS montées à l'avant
Reference number
ISO 12003-1:2021(E)
ISO 2021
---------------------- Page: 1 ----------------------
ISO 12003-1:2021(E)
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© ISO 2021

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Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 12003-1:2021(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ..............................................................................................................................................................................................................................vii

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

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

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Symbols .......................................................................................................................................................................................................................... 6

5 Test apparatus and equipment .............................................................................................................................................................. 7

5.1 Apparatus for both dynamic and static testing ........................................................................................................... 7

5.1.1 Clearance zone framework ..................................................................................................................................... 7

5.1.2 Apparatus for crushing tests ................................................................................................................................. 7

5.1.3 Rear hard fixture test rig ........................................................................................................................................... 8

5.2 Apparatus for dynamic testing .................................................................................................................................................. 9

5.2.1 Device to strike a blow against the front-mounted ROPS............................................................. 9

5.2.2 Pendulum supports ....................................................................................................................................................10

5.2.3 Means of lashing the tractor to the ground ............................................................................................10

5.2.4 Wheel beam .......................................................................................................................................................................11

5.2.5 Wheel prop ........................................................................................................................................................................11

5.2.6 Props and lashings for articulated tractors ...........................................................................................13

5.2.7 Tyre pressures and deflection ...........................................................................................................................13

5.2.8 Device to measure elastic deflection ...........................................................................................................13

5.3 Apparatus for static testing .......................................................................................................................................................14

6 Preparation of tractor and ROPS for testing .........................................................................................................................15

7 ROPS deflection preliminary tests ..................................................................................................................................................16

7.1 General requirements ....................................................................................................................................................................16

7.2 Lateral stability test .........................................................................................................................................................................16

7.3 Non-continuous rolling test ......................................................................................................................................................17

7.3.1 General...................................................................................................................................................................................17

7.3.2 Demonstration of non-continuous rolling behaviour by means of the

overturning test .............................................................................................................................................................17

7.3.3 Demonstration of non-continuous rolling behaviour by calculation ..............................18

8 ROPS deflection test procedures .......................................................................................................................................................18

8.1 General requirements ....................................................................................................................................................................18

8.2 Test methods ..........................................................................................................................................................................................18

8.3 Test sequence ........................................................................................................................................................................................18

8.4 Rear fixture test procedure .......................................................................................................................................................19

8.5 Dynamic (impact) test procedures for front-mounted ROPS ......................................................................19

8.5.1 Rear impact test procedure .................................................................................................................................19

8.5.2 Front impact test procedure ...............................................................................................................................20

8.5.3 Side impact test procedure ..................................................................................................................................21

8.5.4 Additional impact tests ...........................................................................................................................................22

8.6 Static test procedures for front-mounted ROPS ......................................................................................................22

8.6.1 Test preparation ............................................................................................................................................................22

8.6.2 General requirements for horizontal loading test procedures .............................................23

8.6.3 Rear loading ......................................................................................................................................................................23

8.6.4 Front loading ....................................................................................................................................................................23

8.6.5 Side loading .......................................................................................................................................................................24

8.7 Vertical crushing test procedure ..........................................................................................................................................24

8.8 Additional vertical crushing tests ........................................................................................................................................24

8.9 Observations during testing .....................................................................................................................................................24

8.9.1 Fractures and cracks ..................................................................................................................................................24

8.9.2 Clearance zone ................................................................................................................................................................24

© ISO 2021 – All rights reserved iii
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ISO 12003-1:2021(E)

8.9.3 Recording permanent deflection ....................................................................................................................25

9 Determination of seat index point (SIP), seat location and adjustment for test ............................25

9.1 General ........................................................................................................................................................................................................25

9.2 Seat location and adjustment for tests ............................................................................................................................25

10 Clearance zone .....................................................................................................................................................................................................25

10.1 General ........................................................................................................................................................................................................25

10.2 Clearance zone for tractors with a non-reversible seat ....................................................................................25

10.3 Clearance zone for tractors with a reversible driving position ..................................................................27

10.4 Optional seats........................................................................................................................................................................................28

11 Tolerances ................................................................................................................................................................................................................28

12 Acceptance conditions .................................................................................................................................................................................29

12.1 General ........................................................................................................................................................................................................29

12.2 Clearance zone .....................................................................................................................................................................................29

12.3 Seat anchorage performance ...................................................................................................................................................29

12.4 Folding ROPS performance .......................................................................................................................................................29

12.5 After impact loads .............................................................................................................................................................................29

12.6 After static horizontal loads .....................................................................................................................................................30

12.7 Additional conditions .....................................................................................................................................................................30

12.8 Cold weather embrittlement ....................................................................................................................................................33

13 Seatbelt anchorage test procedures ..............................................................................................................................................33

14 Folding ROPS ..........................................................................................................................................................................................................33

15 Labelling .....................................................................................................................................................................................................................34

16 Extension to other models .......................................................................................................................................................................34

16.1 Administrative extension ............................................................................................................................................................34

16.2 Technical extension ..........................................................................................................................................................................34

16.2.1 General...................................................................................................................................................................................34

16.2.2 Extension of the structural test results to other models of tractors ................................35

16.2.3 Extension of the structural test results to modified models of the

protective structure ........................................................................................................................................... .........35

16.2.4 Type extension limits ................................................................................................................................................35

16.2.5 Increase of the declared reference mass ..................................................................................................36

17 Test report ................................................................................................................................................................................................................36

Annex A (normative) Requirements for providing resistance to brittle fracture of front-

mounted ROPS at a reduced operation temperature ..................................................................................................37

Annex B (informative) Folding ROPS test procedures .....................................................................................................................39

Annex C (normative) Test report for front-mounted ROPS ........................................................................................................47

Annex D (normative) Non-continuous rolling test procedure — Calculation method ..................................57

Bibliography .............................................................................................................................................................................................................................61

iv © ISO 2021 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 12003-1:2021(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 23, Tractors and machinery for agriculture

and forestry, Subcommittee SC 2, Common tests.

This third edition cancels and replaces the second edition (ISO 12003-1:2008), which has been

technically revised.
The main changes compared to the previous edition are as follows:

— the main title has been changed, referencing type of tractor, from “Agricultural and forestry

tractors” to “Tractors for agriculture and forestry”;

— seat anchorage test procedures of OECD in ISO 12003 have been added as optional testing;

— ergonomic folding ROPS test procedures of OECD in ISO 12003 have been added as optional testing;

— definitions for unballasted mass, plane, track width, maximum permissible mass have been added;

— tractor mass limits for unballasted tractor has been specified;
— permitted mass ratio has been specified (1,75);
— reference mass limits have been added;
— tractor lashings method of lashing has been changed;

— seat position during test has been updated to include seats with adjustable backrest;

— clearance zone has been updated for clarity and information for reversible seat has been added;

— Figure 17 has been updated to be harmonize with OECD Code 6; specifically, a new key “g” has been

added to indicate failure at any stage when load drops below 0,8F ;
max
— cold weather embrittlement test has been added;
© ISO 2021 – All rights reserved v
---------------------- Page: 5 ----------------------
ISO 12003-1:2021(E)

— reversible seat operator seat zones and formulae have been updated to be harmonized with OECD

Code 6;
— non-continuous rolling test methods has been added.
A list of all parts in the ISO 12003 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.
vi © ISO 2021 – All rights reserved
---------------------- Page: 6 ----------------------
ISO 12003-1:2021(E)
Introduction

Testing of roll-over protective structures (ROPS) for narrow tractors for agriculture and forestry

intends to minimize the likelihood of driver injury resulting from accidental overturning during

normal operation (e.g. field work) of the tractor. The strength of the front-mounted ROPS is tested by

applying either static or dynamic (impact) loads to simulate actual loads which may be imposed on the

front-mounted ROPS when the tractor overturns either to the rear or to the side without free fall. The

tests allow observations to be made on the strength of the front-mounted ROPS and the attachment

brackets to the tractor and also of the tractor parts that may be affected by the load imposed on the

front-mounted ROPS. This document includes optional testing for seat anchorage points and folding

efforts of front-mounted roll-over protective structure designed to fold.

Tests made using special rigs are intended to simulate such loads as are imposed on a protective

structure, when the tractor overturns. These tests enable observations to be made on the strength of

the protective structure and any brackets attaching it to the tractor and any parts of the tractor which

transmit the test load.

Provision is made to cover both tractors with the conventional forward-facing driving position only

and those with a reversible driving position, which is in agreement with the relevant OECD test code

practice (see Reference [4]). For tractors with a reversible driving position, a clearance zone is defined

to be the combined clearance zones for the two driving positions.

It is recognized that there can be designs of tractors, such as lawn-mowers, and certain forestry

machines such as forwarders, for which this document is not appropriate.
[2] [3]

NOTE For regular tractors, see ISO 3463 (dynamic test) and ISO 5700 (static test).

© ISO 2021 – All rights reserved vii
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INTERNATIONAL STANDARD ISO 12003-1:2021(E)
Tractors for agriculture and forestry — Roll-over
protective structures on narrow tractors —
Part 1:
Front-mounted ROPS
1 Scope

This document specifies procedures for both the static and dynamic strength testing of roll-over

protective structures (ROPS) front-mounted on narrow tractors. It defines the clearance zone and

acceptance conditions for rigid or tiltable, front, two-post ROPS, including any associated rear fixtures,

and is applicable to tractors so equipped having the following characteristics:

— a ground clearance of not more than 600 mm beneath the lowest points of the front- and rear-axle

housings (not considering lower points on the axle differential);

— a fixed or adjustable minimum track width of one of the two axles of less than 1 150 mm;

NOTE It is understood that the axle mounted with the wider tyres is set at a track width of not more

than 1 150 mm. Tyre track width is adjustable so that the outer edges of the narrower tyres do not extend

beyond the outer edges of the tyres of the other axle. Where the two axles are fitted with rims and tyres of

the same size, the fixed or adjustable track width of the two axles is less than 1 150 mm.

— a mass greater than 400 kg but less than 3 500 kg, unballasted, including the ROPS and tyres of the

largest size recommended by the manufacturer;

— fitted with roll-over protective structures of the dual-pillar type mounted only in front of the

seat index point (SIP) and characterised by a reduced clearance zone attributable to the tractor

silhouette.

This document also specifies optional testing procedures for both seat anchorage points and folding

efforts of front-mounted ROPS designed to fold.
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.

ISO 630-1, Structural steels — Part 1: General technical delivery conditions for hot-rolled products

ISO 630-2, Structural steels — Part 2: Technical delivery conditions for structural steels for general

purposes

ISO 630-3, Structural steels — Part 3: Technical delivery conditions for fine-grain structural steels

ISO 630-4, Structural steels — Part 4: Technical delivery conditions for high yield strength quenched and

tempered structural steel plates and wide flats
ISO 2408, Steel wire ropes — Requirements

ISO 3776-2, Tractors and machinery for agriculture — Seat belts — Part 2: Anchorage strength

requirements
© ISO 2021 – All rights reserved 1
---------------------- Page: 8 ----------------------
ISO 12003-1:2021(E)

ISO 5353, Earth-moving machinery, and tractors and machinery for agriculture and forestry — Seat index

point

ISO 12934, Tractors and machinery for agriculture and forestry — Basic types — Vocabulary

ISO 13854:2017, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body

ISO 80000-1, Quantities and units — Part 1: General

ASTM A370, Standard Test Methods and Definitions for Mechanical Testing of Steel Products

ASAE S313, Soil Cone Penetrometer

ASAE EP542, Procedures for Using and Reporting Data Obtained with the Soil Cone Penetrometer

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 12934 and the following apply.

ISO and IEC maintain terminological 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
roll-over protective structure
ROPS

framework protecting drivers of agricultural tractors, which minimizes the likelihood of driver injury

resulting from accidental overturning during normal field work

Note 1 to entry: The ROPS is characterized by the provision of space for a clearance zone, either inside the

envelope of the structure or within a space bounded by a series of straight lines from the outer edges of the

structure to any part of the tractor that might come into contact with the ground; it is capable of supporting the

tractor in an overturned position.
3.2
front-mounted ROPS

two-post roll-over protective structure (3.1) mounted on the tractor in front of the driver and with a

reduced clearance zone
Note 1 to entry: Compare with rear-mounted ROPS described in ISO 12003-2.
3.3
unballasted mass

mass of the tractor in working order with tanks and radiators full, roll-over protective structure (3.1)

with cladding and any track equipment or additional front-wheel drive components required for normal

use

Note 1 to entry: Not included are the operator, optional ballast weights, additional wheel equipment, special

equipment and loads.
[SOURCE: ISO 5700:2013, 3.2]
3.4
maximum permissible mass
max

maximum mass of the tractor stated by the manufacturer to be technically permissible and declared on

the vehicle’s identification plate and/or in the operator’s handbook

1) American Society of Agricultural Engineers, now known as American Society of Agricultural and Biological

Engineers.
2 © ISO 2021 – All rights reserved
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ISO 12003-1:2021(E)
3.5
reference mass

mass, not less than the maximum unballasted mass (3.3), selected by the manufacturer for calculation

of loading energies and forces to be applied in the tests
3.6
mass ratio
ratio of
max
m =
3.7
reference plane

vertical plane, generally longitudinal to the tractor and passing through the seat index point and the

steering-wheel centre

Note 1 to entry: Normally, this reference plane coincides with the longitudinal median plane of the tractor.

3.8
longitudinal median plane
median longitudinal plane
symmetric longitudinal plane

vertical plane Y passing through the mid-points of AB, perpendicular to AB, A and B being such that

— for each wheel, the vertical plane passing through its axis cuts the mid-plane of the wheel following

a straight line Δ which meets the supporting surface of the vehicle at one point, and

— A and B are two points thus defined which correspond to two wheels, both of which are either

steering or powered wheels, situated respectively at the two ends of the same real or imaginary

axle.

Note 1 to entry: The mid-plane of the dual wheels being equidistant from the inner edge of one wheel and the

outer edge of the other, the straight line Δ is, in this particular case, the intersection of the mid-plane of the dual

wheels and the vertical plane passing through the axis of the axle pin.
[1]
Note 2 to entry: Adapted from ISO 612
...

NORME ISO
INTERNATIONALE 12003-1
Troisième édition
2021-06
Tracteurs agricoles et forestiers —
Structures de protection contre le
retournement (ROPS) pour tracteurs à
voie étroite —
Partie 1:
ROPS montées à l'avant
Tractors for agriculture and forestry — Roll-over protective
structures on narrow tractors —
Part 1: Front-mounted ROPS
Numéro de référence
ISO 12003-1:2021(F)
ISO 2021
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ISO 12003-1:2021(F)
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ii © ISO 2021 – Tous droits réservés
---------------------- Page: 2 ----------------------
ISO 12003-1:2021(F)
Sommaire Page

Avant-propos ................................................................................................................................................................................................................................v

Introduction ..............................................................................................................................................................................................................................vii

1 Domaine d’application ................................................................................................................................................................................... 1

2 Références normatives ................................................................................................................................................................................... 1

3 Termes et définitions ....................................................................................................................................................................................... 2

4 Symboles ....................................................................................................................................................................................................................... 6

5 Appareillage et équipement d’essai ................................................................................................................................................. 7

5.1 Appareillage pour les essais dynamiques et statiques ......................................................................................... 7

5.1.1 Montage pour la zone de dégagement .......................................................................................................... 7

5.1.2 Appareillage pour les essais d’écrasement ............................................................................................... 7

5.1.3 Structure pour l’essai d’un élément arrière rigide ............................................................................. 8

5.2 Appareillage pour les essais dynamiques ........................................................................................................................ 9

5.2.1 Dispositif pour réaliser un impact contre la ROPS montée à l’avant .................................. 9

5.2.2 Supports du pendule .................................................................................................................................................10

5.2.3 Moyens d’ancrage au sol du tracteur ...........................................................................................................10

5.2.4 Poutre de blocage des roues ...............................................................................................................................11

5.2.5 Étai de blocage des roues ......................................................................................................................................11

5.2.6 Étais et ancrages pour les tracteurs articulés ......................................................................................13

5.2.7 Pression et déformation des pneumatiques .........................................................................................13

5.2.8 Dispositif de mesure de la déformation élastique ...........................................................................13

5.3 Appareillage pour les essais statiques .............................................................................................................................14

6 Préparation du tracteur et de la ROPS pour les essais...............................................................................................15

7 Essais préalables aux essais de déformation de la ROPS ........................................................................................16

7.1 Exigences générales .........................................................................................................................................................................16

7.2 Essai de stabilité latérale .............................................................................................................................................................16

7.3 Essai de retournement non continu ..................................................................................................................................17

7.3.1 Généralités .........................................................................................................................................................................17

7.3.2 Démonstration du comportement au retournement non continu au

moyen de l’essai de retournement ................................................................................................................17

7.3.3 Démonstration du comportement au retournement non continu par calculs ........18

8 Modes opératoires d’essai de déformation de la ROPS .............................................................................................18

8.1 Exigences générales .........................................................................................................................................................................18

8.2 Méthodes d’essai ................................................................................................................................................................................18

8.3 Séquence des essais .........................................................................................................................................................................19

8.4 Mode opératoire d’essai de l’élément arrière ...........................................................................................................19

8.5 Modes opératoires d’essai (de choc) dynamique des ROPS montées à l’avant ............................19

8.5.1 Mode opératoire d’essai de choc à l’arrière ...........................................................................................19

8.5.2 Mode opératoire d’essai de choc à l’avant ..............................................................................................20

8.5.3 Mode opératoire d’essai de choc latéral ...................................................................................................21

8.5.4 Essais de choc supplémentaires ......................................................................................................................22

8.6 Modes opératoires d’essai statique pour les ROPS montées à l’avant .................................................23

8.6.1 Préparation de l’essai ...............................................................................................................................................23

8.6.2 Exigences générales pour les modes opératoires d’essai de charge horizontale .23

8.6.3 Charge à l’arrière ..........................................................................................................................................................23

8.6.4 Charge à l’avant ..............................................................................................................................................................23

8.6.5 Charge latérale ................................................................................................................................................................24

8.7 Mode opératoire d’essai d’écrasement vertical .......................................................................................................24

8.8 Essais d’écrasement vertical supplémentaires ........................................................................................................24

8.9 Observations pendant les essais ...........................................................................................................................................25

8.9.1 Fractures et fissures ...................................................................................................................................................25

8.9.2 Zone de dégagement ..................................................................................................................................................25

© ISO 2021 – Tous droits réservés iii
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ISO 12003-1:2021(F)

8.9.3 Enregistrement de la déformation permanente ................................................................................25

9 Détermination du point repère du siège (SIP) et position et réglage du siège pour

les essais .....................................................................................................................................................................................................................25

9.1 General ........................................................................................................................................................................................................25

9.2 La position et le réglage du siège pour les essais ...................................................................................................25

10 Zone de dégagement ......................................................................................................................................................................................26

10.1 Généralités ...............................................................................................................................................................................................26

10.2 Zone de dégagement pour les tracteurs avec une position de siège non réversible................26

10.3 Zone de dégagement pour tracteurs à poste de conduite réversible ....................................................27

10.4 Sièges optionnels ...............................................................................................................................................................................28

11 Tolérances ................................................................................................................................................................................................................28

12 Conditions d’acceptation ..........................................................................................................................................................................29

12.1 Généralités ...............................................................................................................................................................................................29

12.2 Zone de dégagement .......................................................................................................................................................................29

12.3 Performance d’ancrage du siège ...........................................................................................................................................29

12.4 Performance de pliage de la ROPS ......................................................................................................................................29

12.5 Après l’application des charges de choc ........................................................................................................................29

12.6 Après l’application des charges horizontales statiques ...................................................................................30

12.7 Conditions supplémentaires ....................................................................................................................................................30

12.8 Fragilisation par temps froid ...................................................................................................................................................33

13 Modes opératoires d’essai d’ancrage de ceinture de sécurité ...........................................................................33

14 ROPS pliable ...........................................................................................................................................................................................................33

15 Étiquetage .................................................................................................................................................................................................................34

16 Extension à d’autres modèles de tracteurs ............................................................................................................................34

16.1 Extension administrative ............................................................................................................................................................34

16.2 Extension technique ........................................................................................................................................................................35

16.2.1 Généralités .........................................................................................................................................................................35

16.2.2 Extension des résultats d’essai structurel à d’autres modèles de tracteurs .............35

16.2.3 Extension des résultats d’essai structurel à des modèles modifiés de la

structure de protection ...........................................................................................................................................35

16.2.4 Limites de ce type d’extension ..........................................................................................................................35

16.2.5 Augmentation de la masse de référence déclarée ............................................................................36

17 Rapport d’essai ....................................................................................................................................................................................................36

Annexe A (normative) Exigences requises pour assurer la résistance à la friabilité des

ROPS montées à l’avant lors de travaux à basse température ...........................................................................37

Annexe B (informative) Modes opératoires d’essai de la ROPS pliable .........................................................................39

Annexe C (normative) Rapport d’essai de la ROPS montée à l’avant ...............................................................................47

Annexe D (normative) Mode opératoire d’essai de retournement non continu — Méthode

de calcul ......................................................................................................................................................................................................................57

Bibliographie ...........................................................................................................................................................................................................................60

iv © ISO 2021 – Tous droits réservés
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ISO 12003-1:2021(F)
Avant-propos

L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes

nationaux de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est

en général confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude

a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,

gouvernementales et non gouvernementales, en liaison avec l’ISO participent également aux travaux.

L’ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui

concerne la normalisation électrotechnique.

Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont

décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier de prendre note des différents

critères d’approbation requis pour les différents types de documents ISO. Le présent document a été

rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir www

.iso .org/ directives).

L’attention est attirée sur le fait que certains des éléments du présent document peuvent faire l’objet de

droits de propriété intellectuelle ou de droits analogues. L’ISO ne saurait être tenue pour responsable

de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant

les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de

l’élaboration du document sont indiqués dans l’Introduction et/ou dans la liste des déclarations de

brevets reçues par l’ISO (voir www .iso .org/ brevets).

Les appellations commerciales éventuellement mentionnées dans le présent document sont données

pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un

engagement.

Pour une explication de la nature volontaire des normes, la signification des termes et expressions

spécifiques de l’ISO liés à l’évaluation de la conformité, ou pour toute information au sujet de l’adhésion

de l’ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles

techniques au commerce (OTC), voir le lien suivant: www .iso .org/ iso/ fr/ avant -propos.

Le présent document a été élaboré par le comité technique ISO/TC 23, Tracteurs et matériels agricoles et

forestiers, sous-comité SC 2, Essais communs.

Cette troisième édition annule et remplace la deuxième édition (ISO 12003-1:2008), qui a fait l’objet

d’une révision technique.

Les principales modifications par rapport à l’édition précédente sont les suivantes:

— modification du titre principal en anglais, référençant le type de tracteur, de «Agricultural and

forestry tractors» à «Tractors for agriculture and forestry» (pas de changement du titre français);

— ajout des modes opératoires d’essai d’ancrage de siège de l’OCDE dans l’ISO 12003 en tant qu’essais

facultatifs;

— ajout des modes opératoires d’essai de la ROPS pliable ergonomique de l’OCDE dans l’ISO 12003

en tant qu’essais facultatifs;

— ajout des définitions de masse d’un tracteur non lesté, plan, largeur de voie et masse maximale

autorisée;
— spécification des limites de masse pour un tracteur non lesté;
— spécification du rapport de masse autorisé (1,75);
— ajout de limites de masse de référence;
— modification de la méthode de tension des ancrages de tracteur;

— mise à jour de la position du siège pendant l’essai pour intégrer les sièges avec dossier réglable;

© ISO 2021 – Tous droits réservés v
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ISO 12003-1:2021(F)

— mise à jour de la zone de dégagement pour la clarté et ajout d’informations pour les sièges réversibles;

— mise à jour de la Figure 17 pour harmonisation avec le Code n° 6 de l’OCDE; en particulier, ajout

d’une nouvelle légende «g» pour indiquer l’échec à tous les stades quand la charge tombe au-dessous

de 0,8 F ;
max
— ajout d’un essai de fragilisation par temps froid;

— mise à jour des zones et des formules du siège réversible de l’opérateur pour harmonisation avec le

Code n° 6 de l’OCDE;
— ajout de méthodes d’essai de retournement non continu.

Une liste de toutes les parties de la série ISO 12003 se trouve sur le site web de l’ISO.

Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent

document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes

se trouve à l’adresse www .iso .org/ fr/ members .html.
vi © ISO 2021 – Tous droits réservés
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ISO 12003-1:2021(F)
Introduction

L’essai des structures de protection contre le retournement (ROPS, de l’anglais «roll-over protective

structure») des tracteurs agricoles et forestiers à voie étroite vise à réduire les risques de blessure

du conducteur résultant d’un renversement accidentel au cours de l’utilisation normale (par exemple,

travail dans les champs) du tracteur. La résistance de la structure de protection contre le retournement

(ROPS) montée à l’avant est contrôlée par l’application de charges statiques ou dynamiques (chocs)

pour simuler les charges réelles qui peuvent être imposées à la cabine ou au bâti lorsque le tracteur

se retourne soit vers l’arrière, soit sur le côté sans chute libre. Les essais permettent des observations

sur la résistance de la ROPS montée à l’avant et des fixations sur le tracteur, ainsi que sur les éléments

du tracteur qui peuvent être affectés par la charge imposée à la ROPS. Le présent document comprend

également des essais facultatifs pour les points d’ancrage du siège et les efforts de pliage de la ROPS

montée à l’avant conçue pour se plier.

Les essais effectués à l’aide de dispositifs spéciaux sont destinés à simuler les charges subies par le

dispositif de protection en cas de renversement du tracteur. Ces essais permettent d’observer la

résistance de la structure de protection et de ses fixations sur le tracteur ainsi que toute partie du

tracteur transmettant la charge d’essai.

Des dispositions sont prises pour couvrir aussi bien les tracteurs n’ayant qu’une position possible du

poste de conduite (face à l’avant) et les tracteurs ayant un poste de conduite réversible, conformément

aux pratiques du code d’essai pertinent de l’OCDE (voir Référence [4]). Pour les tracteurs à poste de

conduite réversible, la zone de dégagement se définit comme étant la combinaison des zones de

dégagement correspondant aux deux positions de conduite.

Il est admis que le présent document n’est pas approprié pour certaines conceptions de tracteurs,

par exemple les tondeuses à gazon, et certaines machines forestières, telles que les débardeuses.

[2] [3]

NOTE Pour les tracteurs normaux, voir ISO 3463 (essai dynamique) et ISO 5700 (essai statique).

© ISO 2021 – Tous droits réservés vii
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NORME INTERNATIONALE ISO 12003-1:2021(F)
Tracteurs agricoles et forestiers — Structures de
protection contre le retournement (ROPS) pour tracteurs à
voie étroite —
Partie 1:
ROPS montées à l'avant
1 Domaine d’application

Le présent document spécifie des modes opératoires d’essai de résistance statique et dynamique des

structures de protection contre le retournement (ROPS) pour des tracteurs à voie étroite montées à

l’avant. Il définit la zone de dégagement et les conditions d’acceptation des structures de protection

contre le retournement (ROPS) à deux montants, rigides ou inclinables, montées à l’avant, y compris tout

élément arrière associé. Il est applicable aux tracteurs ainsi équipés, présentant les caractéristiques

suivantes:

— garde au sol inférieure ou égale à 600 mm, au-dessous des points les plus bas de l’essieu avant et de

l’essieu arrière, à l’exception des points inférieurs sur le différentiel de l’essieu;

— largeur de voie minimale fixe ou réglable de l’un des deux essieux inférieure à 1 150 mm;

NOTE Il est entendu que l’essieu monté avec les pneumatiques les plus larges est réglé à une largeur

de voie inférieure ou égale à 1 150 mm. La largeur de voie des pneumatiques est réglable de sorte que les

bords extrêmes des pneumatiques les plus étroits ne dépassent pas les bords extrêmes des pneumatiques de

l’autre essieu. Lorsque les deux essieux sont équipés de jantes et de pneumatiques de même taille, la largeur

de voie fixe ou réglable des deux essieux est inférieure à 1 150 mm.

— masse d’un tracteur non lesté, supérieure à 400 kg, mais inférieure à 3 500 kg, mais en comptant la

ROPS et la plus grande taille de pneumatiques recommandée par le constructeur;

— structures de protection contre le retournement du type à deux montants montées uniquement

devant le point repère du siège (SIP) et caractérisées par une zone de dégagement réduite attribuable

à la silhouette du tracteur.

Le présent document spécifie également des modes opératoires d’essais facultatifs pour les points

d’ancrage du siège et les efforts de pliage de la ROPS montée à l’avant conçue pour se plier.

2 Références normatives

Les documents suivants sont cités dans le texte de sorte qu’ils constituent, pour tout ou partie de leur

contenu, des exigences du présent document. Pour les références datées, seule l’édition citée s’applique.

Pour les références non datées, la dernière édition du document de référence s’applique (y compris les

éventuels amendements).

ISO 630-1, Aciers de construction — Partie 1: Conditions générales techniques de livraison pour les produits

laminés à chaud

ISO 630-2, Aciers de construction — Partie 2: Conditions techniques de livraison pour aciers de construction

métallique d'usage général

ISO 630-3, Aciers de construction — Partie 3: Conditions techniques de livraison pour aciers de construction

à grains fins
© ISO 2021 – Tous droits réservés 1
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ISO 12003-1:2021(F)

ISO 630-4, Aciers de construction — Partie 4: Conditions techniques de livraison pour tôles en acier de

construction trempé et revenu à haute limite d'élasticité et larges-plats
ISO 2408, Câbles en acier — Exigences

ISO 3776-2, Tracteurs et matériels agricoles — Ceintures de sécurité — Partie 2: Exigences relatives à la

résistance des ancrages

ISO 5353, Engins de terrassement, et tracteurs et matériels agricoles et forestiers — Point repère du siège

ISO 12934, Tracteurs et matériels agricoles et forestiers — Principaux types — Vocabulaire

ISO 13854:2017, Sécurité des machines — Écartements minimaux pour prévenir les risques d'écrasement

de parties du corps humain
ISO 80000-1, Grandeurs et unités — Partie 1: Généralités

ASTM A370, Standard Test Methods and Definitions for Mechanical Testing of Steel Products (disponible en

anglais seulement).
ASAE S313, Soil Cone Penetrometer (disponible en anglais seulement).

ASAE EP542, Procedures for Using and Reporting Data Obtained with the Soil Cone Penetrometer

(disponible en anglais seulement).
3 Termes et définitions

Pour les besoins du présent document, les termes et définitions de l’ISO 12934 ainsi que les suivants,

s’appliquent.

L’ISO et l’IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en

normalisation, consultables aux adresses suivantes:

— ISO Online browsing platform: disponible à l’adresse https:// www .iso .org/ obp;

— IEC Electropedia: disponible à l’adresse https:// www .electropedia .org/ .
3.1
structure de protection contre le retournement
ROPS

bâti pour la protection des conducteurs de tracteurs agricoles, destiné à réduire les risques de blessure

du conducteur résultant d’un retournement accidentel au cours d’un fonctionnement normal dans les

champs

Note 1 à l'article: La ROPS est caractérisée par l’espace prévu pour la zone de dégagement soit à l’intérieur de

l’enveloppe de la structure, soit à l’intérieur d’un espace défini par une série de lignes droites joignant le bord

extérieur de la structure à n’importe quel élément du tracteur susceptible d’entrer en contact avec le sol et

capable de supporter le tracteur dans cette position, si le tracteur se retourne.

3.2
ROPS montée à l’avant

structure de protection contre le retournement (3.1) à deux montants, montée sur le tracteur devant le

conducteur et caractérisée par une zone de dégagement réduite

Note 1 à l'article: Comparer à la ROPS montée à l’arrière, définie dans l’ISO 12003-2.

1) American Society of Agricultural Engineers, à présent connue en tant qu’American Society of Agricultural and

Biological Engineers.
2 © ISO 2021 – Tous droits réservés
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ISO 12003-1:2021(F)
3.3
masse d’un tracteur non lesté

masse du tracteur en état de fonctionnement, réservoirs et circuits de refroidissement pleins, équipé

de la structure de protection contre le retournement (3.1) avec son revêtement et de tout équipement ou

composants supplémentaires pour les roues motrices avant nécessaires en utilisation normale

Note 1 à l'article: Le conducteur, les masses de lestage en option, les équipements spéciaux pour roues, les

équipements particuliers et les charges sont exclus.
[SOURCE: ISO 5700:2013, 3.2]
3.4
masse maximale autorisée
max
masse maximale du tracteur indiquée par le const
...

INTERNATIONAL ISO
STANDARD 12003-1
Third edition
Tractors for agriculture and
forestry — Roll-over protective
structures on narrow tractors —
Part 1:
Front-mounted ROPS
Tracteurs agricoles et forestiers — Structures de protection contre le
retournement (ROPS) pour tracteurs à voie étroite —
Partie 1: ROPS montées à l'avant
PROOF/ÉPREUVE
Reference number
ISO 12003-1:2021(E)
ISO 2021
---------------------- Page: 1 ----------------------
ISO 12003-1:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

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 PROOF/ÉPREUVE © ISO 2021 – All rights reserved
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ISO 12003-1:2021(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ..............................................................................................................................................................................................................................vii

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

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

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Symbols .......................................................................................................................................................................................................................... 6

5 Test apparatus and equipment .............................................................................................................................................................. 7

5.1 Apparatus for both dynamic and static testing ........................................................................................................... 7

5.1.1 Clearance zone framework ..................................................................................................................................... 7

5.1.2 Apparatus for crushing tests ................................................................................................................................. 7

5.1.3 Rear hard fixture test rig ........................................................................................................................................... 7

5.2 Apparatus for dynamic testing .................................................................................................................................................. 8

5.2.1 Device to strike a blow against the front-mounted ROPS............................................................. 8

5.2.2 Pendulum supports ....................................................................................................................................................... 9

5.2.3 Means of lashing the tractor to the ground ............................................................................................... 9

5.2.4 Wheel beam .......................................................................................................................................................................10

5.2.5 Wheel prop ........................................................................................................................................................................10

5.2.6 Props and lashings for articulated tractors ...........................................................................................12

5.2.7 Tyre pressures and deflection ...........................................................................................................................12

5.2.8 Device to measure elastic deflection ...........................................................................................................12

5.3 Apparatus for static testing .......................................................................................................................................................13

6 Preparation of tractor and ROPS for testing .........................................................................................................................14

7 ROPS deflection preliminary tests ..................................................................................................................................................15

7.1 General requirements ....................................................................................................................................................................15

7.2 Lateral stability test .........................................................................................................................................................................15

7.3 Non-continuous rolling test ......................................................................................................................................................16

7.3.1 General...................................................................................................................................................................................16

7.3.2 Demonstration of non-continuous rolling behaviour by means of the

overturning test .............................................................................................................................................................16

7.3.3 Demonstration of non-continuous rolling behaviour by calculation ..............................17

8 ROPS deflection test procedures .......................................................................................................................................................17

8.1 General requirements ....................................................................................................................................................................17

8.2 Test methods ..........................................................................................................................................................................................17

8.3 Test sequence ........................................................................................................................................................................................17

8.4 Rear fixture test procedure .......................................................................................................................................................18

8.5 Dynamic (impact) test procedures for front-mounted ROPS ......................................................................18

8.5.1 Rear impact test procedure .................................................................................................................................18

8.5.2 Front impact test procedure ...............................................................................................................................19

8.5.3 Side impact test procedure ..................................................................................................................................20

8.5.4 Additional impact tests ...........................................................................................................................................21

8.6 Static test procedures for front-mounted ROPS ......................................................................................................21

8.6.1 Test preparation ............................................................................................................................................................21

8.6.2 General requirements for horizontal loading test procedures .............................................22

8.6.3 Rear loading ......................................................................................................................................................................22

8.6.4 Front loading ....................................................................................................................................................................22

8.6.5 Side loading .......................................................................................................................................................................22

8.7 Vertical crushing test procedure ..........................................................................................................................................23

8.8 Additional vertical crushing tests ........................................................................................................................................23

8.9 Observations during testing .....................................................................................................................................................23

8.9.1 Fractures and cracks ..................................................................................................................................................23

8.9.2 Clearance zone ................................................................................................................................................................23

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ISO 12003-1:2021(E)

8.9.3 Recording permanent deflection ....................................................................................................................23

9 Determination of seat index point (SIP), seat location and adjustment for test ............................24

10 Clearance zone .....................................................................................................................................................................................................24

10.1 General ........................................................................................................................................................................................................24

10.2 Clearance zone for tractors with a non-reversible seat ....................................................................................24

10.3 Clearance zone for tractors with a reversible driving position ..................................................................26

10.4 Optional seats........................................................................................................................................................................................26

11 Tolerances ................................................................................................................................................................................................................26

12 Acceptance conditions .................................................................................................................................................................................27

12.1 General ........................................................................................................................................................................................................27

12.2 Clearance zone .....................................................................................................................................................................................27

12.3 Seat anchorage performance ...................................................................................................................................................27

12.4 Folding ROPS performance .......................................................................................................................................................27

12.5 After impact loads .............................................................................................................................................................................27

12.6 After static horizontal loads .....................................................................................................................................................28

12.7 Additional conditions .....................................................................................................................................................................28

12.8 Cold weather embrittlement ....................................................................................................................................................31

13 Seatbelt anchorage test procedures ..............................................................................................................................................31

14 Folding ROPS ..........................................................................................................................................................................................................31

15 Labelling .....................................................................................................................................................................................................................32

16 Extension to other models .......................................................................................................................................................................32

16.1 Administrative extension ............................................................................................................................................................32

16.2 Technical extension ..........................................................................................................................................................................32

16.2.1 General...................................................................................................................................................................................32

16.2.2 Extension of the structural test results to other models of tractors ................................33

16.2.3 Extension of the structural test results to modified models of the

protective structure ........................................................................................................................................... .........33

16.2.4 Type extension limits ................................................................................................................................................33

16.2.5 Increase of the declared reference mass ..................................................................................................34

17 Test report ................................................................................................................................................................................................................34

Annex A (normative) Requirements for providing resistance to brittle fracture of front-

mounted ROPS at a reduced operation temperature ..................................................................................................35

Annex B (informative) Folding ROPS test procedures .....................................................................................................................37

Annex C (normative) Test report for front-mounted ROPS ........................................................................................................45

Annex D (normative) Non-continuous rolling test procedure — Calculation method ..................................55

Bibliography .............................................................................................................................................................................................................................59

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ISO 12003-1:2021(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 23, Tractors and machinery for agriculture

and forestry, Subcommittee SC 2, Common tests.

This third edition cancels and replaces the second edition (ISO 12003-1:2008), which has been

technically revised.
The main changes compared to the previous edition are as follows:

— the main title has been changed, referencing type of tractor, from “Agricultural and forestry

tractors” to “Tractors for agriculture and forestry”;

— seat anchorage test procedures of OECD in ISO 12003 have been added as optional testing;

— ergonomic folding ROPS test procedures of OECD in ISO 12003 have been added as optional testing;

— definitions for unballasted mass, plane, track width, maximum permissible mass have been added;

— tractor mass limits for unballasted tractor has been specified;
— permitted mass ratio has been specified (1,75);
— reference mass limits have been added;
— tractor lashings method of lashing has been changed;

— seat position during test has been updated to include seats with adjustable backrest;

— clearance zone has been updated for clarity and information for reversible seat has been added;

— Figure 17 has been updated to be harmonize with OECD Code 6; specifically, a new key “g” has been

added to indicate failure at any stage when load drops below 0,8F ;
max
— cold weather embrittlement test has been added;
© ISO 2021 – All rights reserved PROOF/ÉPREUVE v
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ISO 12003-1:2021(E)

— reversible seat operator seat zones and formulae have been updated to be harmonized with

OECD Code 6;
— non-continuous rolling test methods has been added.
A list of all parts in the ISO 12003 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.
vi PROOF/ÉPREUVE © ISO 2021 – All rights reserved
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ISO 12003-1:2021(E)
Introduction

Testing of roll-over protective structures (ROPS) for narrow tractors for agriculture and forestry

intends to minimize the likelihood of driver injury resulting from accidental overturning during

normal operation (e.g. field work) of the tractor. The strength of the front-mounted ROPS is tested by

applying either static or dynamic (impact) loads to simulate actual loads which may be imposed on the

front-mounted ROPS when the tractor overturns either to the rear or to the side without free fall. The

tests allow observations to be made on the strength of the front-mounted ROPS and the attachment

brackets to the tractor and also of the tractor parts that may be affected by the load imposed on the

front-mounted ROPS. This document includes optional testing for seat anchorage points and folding

efforts of front-mounted roll-over protective structure designed to fold.

Tests made using special rigs are intended to simulate such loads as are imposed on a protective

structure, when the tractor overturns. These tests enable observations to be made on the strength of

the protective structure and any brackets attaching it to the tractor and any parts of the tractor which

transmit the test load.

Provision is made to cover both tractors with the conventional forward-facing driving position only

and those with a reversible driving position, which is in agreement with the relevant OECD test code

practice (see Reference [4]). For tractors with a reversible driving position, a clearance zone is defined

to be the combined clearance zones for the two driving positions.

It is recognized that there can be designs of tractors, such as lawn-mowers, and certain forestry

machines such as forwarders, for which this document is not appropriate.
[2] [3]

NOTE For regular tractors, see ISO 3463 (dynamic test) and ISO 5700 (static test).

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INTERNATIONAL STANDARD ISO 12003-1:2021(E)
Tractors for agriculture and forestry — Roll-over
protective structures on narrow tractors —
Part 1:
Front-mounted ROPS
1 Scope

This document specifies procedures for both the static and dynamic strength testing of roll-over

protective structures (ROPS) front-mounted on narrow tractors. It defines the clearance zone and

acceptance conditions for rigid or tiltable, front, two-post ROPS, including any associated rear fixtures,

and is applicable to tractors so equipped having the following characteristics:

— a ground clearance of not more than 600 mm beneath the lowest points of the front- and rear-axle

housings (not considering lower points on the axle differential);

— a fixed or adjustable minimum track width of one of the two axles of less than 1 150 mm;

NOTE It is understood that the axle mounted with the wider tyres is set at a track width of not more

than 1 150 mm. Tyre track width is adjustable so that the outer edges of the narrower tyres do not extend

beyond the outer edges of the tyres of the other axle. Where the two axles are fitted with rims and tyres of

the same size, the fixed or adjustable track width of the two axles is less than 1 150 mm.

— a mass greater than 400 kg but less than 3 500 kg, unballasted, including the ROPS and tyres of the

largest size recommended by the manufacturer;

— fitted with roll-over protective structures of the dual-pillar type mounted only in front of the

seat index point (SIP) and characterised by a reduced clearance zone attributable to the tractor

silhouette.

This document also specifies optional testing procedures for both seat anchorage points and folding

efforts of front-mounted ROPS designed to fold.
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.

ISO 630-1, Structural steels — Part 1: General technical delivery conditions for hot-rolled products

ISO 630-2, Structural steels — Part 2: Technical delivery conditions for structural steels for general

purposes

ISO 630-3, Structural steels — Part 3: Technical delivery conditions for fine-grain structural steels

ISO 630-4, Structural steels — Part 4: Technical delivery conditions for high-yield-strength quenched and

tempered structural steel plates
ISO 2408, Steel wire ropes — Requirements

ISO 3776-2, Tractors and machinery for agriculture — Seat belts — Part 2: Anchorage strength

requirements
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ISO 12003-1:2021(E)

ISO 5353, Earth-moving machinery, and tractors and machinery for agriculture and forestry — Seat

index point

ISO 12934, Tractors and machinery for agriculture and forestry — Basic types — Vocabulary

ISO 13854:2017, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body

ISO 80000-1, Quantities and units — Part 1: General

ASTM A370, Standard Test Methods and Definitions for Mechanical Testing of Steel Products

ASAE S313, Soil Cone Penetrometer

ASAE EP542, Procedures for Using and Reporting Data Obtained with the Soil Cone Penetrometer

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 12934 and the following apply.

ISO and IEC maintain terminological 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
roll-over protective structure
ROPS

framework protecting drivers of agricultural tractors, which minimizes the likelihood of driver injury

resulting from accidental overturning during normal field work

Note 1 to entry: The ROPS is characterized by the provision of space for a clearance zone, either inside the

envelope of the structure or within a space bounded by a series of straight lines from the outer edges of the

structure to any part of the tractor that might come into contact with the ground; it is capable of supporting the

tractor in an overturned position.
3.2
front-mounted ROPS

two-post roll-over protective structure (3.1) mounted on the tractor in front of the driver and with a

reduced clearance zone
Note 1 to entry: Compare with rear-mounted ROPS described in ISO 12003-2.
3.3
unballasted mass

mass of the tractor in working order with tanks and radiators full, roll-over protective structure (3.1) with

cladding and any track equipment or additional front-wheel drive components required for normal use

Note 1 to entry: Not included are the operator, optional ballast weights, additional wheel equipment, special

equipment and loads.
[SOURCE: ISO 5700:2013, 3.2]
3.4
maximum permissible mass
max

maximum mass of the tractor stated by the manufacturer to be technically permissible and declared on

the vehicle’s identification plate and/or in the operator’s handbook

1) American Society of Agricultural Engineers, now known as American Society of Agricultural and Biological

Engineers.
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ISO 12003-1:2021(E)
3.5
reference mass

mass, not less than the maximum unballasted mass (3.3), selected by the manufacturer for calculation

of loading energies and forces to be applied in the tests
3.6
mass ratio
m ratio of
max
m =
3.7
reference plane

vertical plane, generally longitudinal to the tractor and passing through the seat index point and the

steering-wheel centre

Note 1 to entry: Normally, this reference plane coincides with the longitudinal median plane of the tractor.

3.8
longitudinal median plane
median longitudinal plane
symmetric longitudinal plane

vertical plane Y passing through the mid-points of AB, perpendicular to AB, A and B being such that

— for each wheel, the vertical plane passing through its axis cuts the mid-plane of the wheel following

a straight line Δ which meets the supporting surface of the vehicle at one point, and

— A and B are two points thus defined which correspond to two wheels, both of which are either

steering or powered wheels, situated respectively at the two ends of the same real or imaginary axle

Note 1 to entry: The mid-plane of the dual wheels being equidistant from the inner edge of one wheel and the

outer edge of the other, the straight line Δ is, in this particular case, the intersection of the mid-plane of the dual

wheels and the vertical plane passing through the axis of the axle pin.
Note 2 to entry: Adapted from ISO 612:1978, Clause 5.

Note 3 to entry: The longitudinal median plane may also be applied to track-laying tractors.

Note 4 to entry: See Figure 1.
[SOURCE: ISO 5700:2013, 3.8]
Figure 1 — Longitudinal median plane
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