Council Directive 86/298/EEC of 26 May 1986 on rear- mounted roll-over protection structures of narrow-track wheeled agricultural and forestry tractors

Council Directiveof 26 May 1986on rear-mounted roll-over protection structures of narrow-track wheeled agricultural and forestry tractors(86/298/EEC) THE COUNCIL OF THE EUROPEAN COMMUNITIES,Having regard to the Treaty establishing the European Economic Community, and in particular Article 100 thereof,Having regard to the proposal from the CommissionOJ No C 123, 9. 5. 1983, p. 1.,Having regard to the opinion of the European ParliamentOJ No C 307, 14. 11. 1983, p. 103.,Having regard to the opinion of the Economic and Social CommitteeOJ No C 286, 24. 10. 1983, p. 2.,Whereas Council Directive 74/150/EEC of 4 March 1974 on the approximation of the laws of the Member States relating to the type-approval of wheeled agricultural or forestry tractorsOJ No L 84, 28. 3. 1974, p. 10., as last amended by the Act of Accession of Spain and Portugal, lays down that the necessary provisions for the implementation of the EEC type-approval procedure in respect of individual tractor parts or characteristics should be specified in special directives; whereas the provisions relating to roll-over protection structures and their attachments to tractors were laid down by Directives 77/536/EECOJ No L 220, 29. 8. 1977, p. 1. and 79/622/EECOJ No L 179, 17. 7. 1979, p. 1., as last amended by the Act of Accession of Spain and Portugal; whereas these two Directives cover respectively dynamic and static testing procedures — either of which may be employed by manufacturers for the present — and relate to standard tractors, that is, tractors having a maximum ground clearance of 1000 mm and a fixed or adjustable track width of one of the driving axles of not less than 1150 mm and weighing between 1,5 and 4,5 tonnes in the case of tractors covered by the "dynamic testing" Directive and not less than 800 kilograms in the case of tractors covered by the "static testing" Directive;Whereas the tractors covered by this Directive have a maximum ground clearance of 600 mm, a minimum track width of both axles of less than 1150 mm and a mass greater than 600 kilograms; whereas the roll-over protection structures of these tractors, which are used for specific activities, can be made subject to specific requirement or requirements other than those of Directive 77/536/EEC and 79/622/EEC;Whereas the technical requirements with which such "narrow-track" tractors must comply pursuant to national laws relate inter alia to roll-over protection structures and to their attachment to the tractor; whereas those requirements differ from one Member State to another; whereas it is therefore necessary that all Member States adopt the same requirements either in addition to or in place of their existing rules in order, in particular, to allow the EEC type-approval procedure which was the subject of Directive 74/150/EEC to be introduced in respect of each type of tractor;Whereas this Directive covers roll-over protection structures of the rear-mounted rollbar, frame or cab type having a zone of clearance whose upper limit is 900 mm above the seat reference point in order to provide a sufficiently large area or unobstructed space for the protection of the driver; whereas another special Directive will be adopted in respect of roll-over protection structures having two pillars mounted in front of the driver;Whereas a harmonized component type-approval procedure for roll-over protection structures and their attachment to the tractor makes it possible for each Member State to check compliance with the common construction and testing requirements and to inform the other Member States of its findings by sending them copies of the component type-approval certificate completed for each type of roll-over protection structure and its attachment to the tractor; whereas the placing of an EEC component type-approval mark on all structures manufactured in conformity with the approved type obviates any need for technical checks on those structures in the other Member States; whereas common requirements concerning other elements and characteristics of the roll-over protection structure, in particular, devices to prevent continuous roll-over if the tractor overturns, and protection of occupants, will be laid down at a later date;Whereas the harmonized requirements are intended principally to ensure safety on the road and at work throughout the Community; whereas, for this reason, it is necessary to introduce the obligation for tractors covered by this Directive to be fitted with roll-over protection structures;Whereas the approximation of the national laws relating to these tractors entails reciprocal recognition by Member States of the checks carried out by each of them on the basis of the common requirements,HAS ADOPTED THIS DIRECTIVE:

Article 1This Directive shall apply to tractors as defined in Article 1 of Directive 74/150/EEC having the following characteristics:ground clearance of not more than 600 mm measured beneath the lowest points of the front or rear axles, allowing for the differential,fixed or adjustable minimum track width of less than 1150 mm for the axles fitted with the widest tyres; since the axle fitted with the widest tyres is assumed to be adjusted to a maximum track width of 1150 mm, the other axle must be capable of being adjusted in such a way that the outer edges of the narrowest tyres do not project beyond the outer edges of the tyres on the axle with the widest tyres. Where both axles are equipped with wheels and tyres of the same size, the fixed or adjustable track width of both axles must be less than 1150 mm,mass greater than 600 kilograms and corresponding to the unladen weight of the tractor as defined in section 2.4 of Annex I to Directive 74/150/EEC, including the roll-over protection structure fitted in compliance with this Directive and tyres of the largest size recommended by the manufacturer.

Article 21.Each Member State shall grant EEC component type-approval for any type of roll-over protection structure and its tractor attachment which satisfies the construction and testing requirements laid down in Annexes I to IV.2.A Member State which has granted EEC component type-approval shall take the measures required to verify, in so far as is necessary and if need be in cooperation with the competent authorities in the other Member States, that production models conform to the approved type. Such verification shall be limited to spot checks.

Article 3Member States shall, for each type of roll-over protection structure and its tractor attachment which they approve pursuant to Article 2, issue to the manufacturer of the tractor or of the roll-over protection structure, or to his authorized representative, an EEC component type-approval mark conforming to the model shown in Annex VI.Member States shall take all appropriate measures to prevent the use of marks liable to create confusion between roll-over protection structures which have been component type-approved pursuant to Article 2 and other devices.

Article 41.No Member State may prohibit the placing on the market of roll-over protection structures or their attachment to the tractors for which they are intended on grounds relating to their construction if they bear the EEC component type-approval mark.2.Nevertheless, a Member State may prohibit the placing on the market of roll-over protection structures bearing the EEC component type-approval mark which consistently fail to conform to the approved type.That State shall forthwith inform the other Member States and the Commission of the measures taken, specifying the reasons for its decision.

Article 5The competent authorities of each Member State shall, within one month, send to the competent authorities of the other Member States a copy of the component type-approval certificates, an example of which is given in Annex VII, completed for each type of roll-over protection structure which they approve or refuse to approve.

Article 61.If the Member State which has granted EEC component type-approval finds that a number of roll-over protection structures and their tractor attachments bearing the same EEC component type-approval mark do not conform to the type which it has approved, it shall take the necessary measures to ensure that production models conform to the approved type. The competent authorities of that State shall advise those of the other Member States of the measures taken which may, if necessary, where there is serious and repeated failure to conform, extend to withdrawal of EEC component type-approval. The said authorities shall take the same measures if they are informed by the competent authorities of another Member State of such failure to conform.2.The competent authorities of the Member States shall within one month inform each other of any withdrawal of EEC component type-approval and of the reasons for any such measure.

Article 7Any decision taken pursuant to the provisions adopted in implementation of this Directive to refuse or withdraw component type-approval for roll-over protection structures and their tractor attachments, or to prohibit their placing on the market or their use, shall set out in detail the reasons on which it is based. Such decisions shall be notified to the party concerned, who shall at the same time be informed of the remedies available to him under the laws in force in the Member States and of the time limits allowed for the exercise of such remedies.

Article 8No Member State may refuse to grant EEC type-approval or national type-approval in respect of a tractor on grounds relating to roll-over protection structures or their tractor attachment if these bear the EEC component type-approval mark and if the requirements laid down in Annex VIII have been satisfied.

Article 9No Member State may refuse or prohibit the sale, registration, entry into service or use of any tractor on grounds relating to the roll-over protection structure and its tractor attachment if these bear the EEC component type-approval mark and if the requirements laid down in Annex VIII have been met.

Article 10This Directive shall not affect the right of Member States to specify — in due compliance with the Treaty — the requirements they deem necessary to ensure that workers are protected when using the tractors in question, provided this does not mean that the protection structures are modified in a way unspecified in this Directive.

Article 111.In connection with EEC type-approval, any tractor to which Article 1 refers must be fitted with a roll-over protection structure.2.Where the protection structure is not one having two pillars mounted in front of the driver's seat, the structure referred to in paragraph 1 must comply with the requirements laid down in Annexes I to IV to this Directive or to Directives 77/536/EEC or 79/622/EEC.

Article 12Any amendments necessary in order to adapt the requirements of the Annexes to this Directive so as to take account of technical progress shall be adopted in accordance with the procedure laid down in Article 13 of Directive 74/150/EEC.

Article 13Within 18 months of the notification of this Directive, the Council, acting on a proposal from the Commission, on the basis of the provisions of the Treaty, shall adopt a Directive supplementing this Directive by means of provisions introducing the additional impact tests in the dynamic test procedure.

Article 141.Member States shall bring into force the provisions necessary in order to comply with this Directive within 24 months of its notificationThis Directive was notified to the Member States on 2 June 1986.. They shall forthwith inform the Commission thereof.2.Member States shall ensure that the texts of the main provisions of national law which they adopt in the field covered by this Directive are communicated to the Commission.

Article 15This Directive is addressed to the Member States.

nullLIST OF ANNEXES

ANNEX I	Conditions for EEC component type-approval
ANNEX II	Conditions for testing the strength of the protection structures and of their attachment to tractors
ANNEX III	Test procedures
	A.Dynamic testing
	B.Static testing
ANNEX IV	Figures
ANNEX V	Model report relating to the EEC component type-approval tests of a protection structure with regard to its strength as well as to the strength of its attachment to the tractor
ANNEX VI	Marks
ANNEX VII	Model EEC component type-approval certificate.
ANNEX VIII	Conditions for EEC type-approval
ANNEX IX	Annex to the EEC type-approval certificate for a tractor type with regard to the strength of the protection structures and the strength of their attachment to the tractor

ANNEX ICONDITIONS FOR EEC COMPONENT TYPE-APPROVAL1.The definitions and requirements of point 1 of Code 7OECD standard code for the official testing of rear-mounted roll-over protective structures on narrow-track wheeled agricultural and forestry tractors. of OECD Decision C(2008) 128 of October 2008, with the exception of point 1.1 (Agricultural and forestry tractors), shall apply, reading as follows:"1.Definitions1.1[not applicable]1.2Rolling Over Protective Structure (ROPS)Roll-over protective structure (safety cab or frame), hereinafter called "protective structure", means the structure on a tractor the essential purpose of which is to avoid or limit risks to the driver resulting from roll-over of the tractor during normal use.The roll-over protective structure is characterized by the provision of space for a clearance zone large enough to protect the driver when seated 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 flat ground and that is capable of supporting the tractor in that position if the tractor overturns.1.3Track1.3.1Preliminary definition: median plane of the wheelThe median plane of the wheel is equidistant from the two planes containing the periphery of the rims at their outer edges.1.3.2Definition of trackThe vertical plane through the wheel axis intersects its median plane along a straight line which meets the supporting surface at one point. If A and B are the two points thus defined for the wheels on the same axle of the tractor, then the track width is the distance between points A and B. The track may be thus defined for both front and rear wheels. Where there are twin wheels, the track is the distance between two planes each being the median plane of the pairs of wheels.1.3.3Additional definition: median plane of the tractorTake the extreme positions of points A and B for the tractor rear axle, which gives the maximum possible value for the track. The vertical plane at right angles to the line AB at its centre point is the median plane of the tractor.1.4WheelbaseThe distance between the vertical planes passing through the two lines AB as defined above, one for the front wheels and one for the rear-wheels.1.5Determination of seat index point; Seat adjustment for test1.5.1Seat index point (SIP)For extension tests to test reports that originally used seat reference point (SRP), the required measurements shall be made with reference to SRP instead of SIP and the use of SRP shall be clearly indicated (see Annex 1).The seat index point shall be determined in accordance with ISO 5353:19951.5.2Seat location and adjustment for test1.5.2.1where the inclination of the backrest and seat pan is adjustable, these must be adjusted so that the seat index point is in its rear uppermost position;1.5.2.2where the seat is equipped with suspension, the latter must be blocked at mid-travel, unless this is contrary to the instructions clearly laid down by the seat manufacturer;1.5.2.3where the position of the seat is adjustable only lengthwise and vertically, the longitudinal axis passing through the seat index point shall be parallel with the vertical longitudinal plane of the tractor passing through the centre of the steering wheel and not more than 100 mm from that plane.1.6Clearance zone1.6.1Reference planeThe clearance zone is illustrated in Figures 7.1 and 7.2. The zone is defined in relation to the reference plane and the seat index point (SIP). The reference plane is a vertical plane, generally longitudinal to the tractor and passing through the seat index point and the centre of the steering wheel. Normally the reference plane coincides with the longitudinal median plane of the tractor. This reference plane shall be assumed to move horizontally with the seat and steering wheel during loading but to remain perpendicular to the tractor or the floor of the roll-over protective structure. The clearance zone shall be defined on the basis of sub clauses 1.6.2 and 1.6.3.1.6.2Determination of the clearance zone for tractors with a non-reversible seatThe clearance zone for tractors with a non-reversible seat is defined in 1.6.2.1 to 1.6.2.13 below and is bounded by the following planes, the tractor being on a horizontal surface, the seat, where adjustable, adjusted to its rear uppermost positionUsers are reminded that the seat index point is determined according to ISO 5353 and is a fixed point with respect to the tractor that does not move as the seat is adjusted away from the mid-position. For purposes of determining the clearance zone, the seat shall be placed in the rear and uppermost position.", and the steering wheel, where adjustable, adjusted to the mid-position for seated driving:1.6.2.1.a horizontal plane A1 B1 B2 A2, (810 + av) mm above the seat index point (SIP) with line B1B2 located (ah–10) mm behind the SIP;1.6.2.2.an inclined plane H1 H2 G2 G1, perpendicular to the reference plane, including both a point 150 mm behind line B1B2 and the rearmost point of the seat backrest;1.6.2.3.a cylindrical surface A1 A2 H2 H1 perpendicular to the reference plane, having a radius of 120 mm, tangential to the planes defined in 1.6.2.1 and 1.6.2.2 above;1.6.2.4.a cylindrical surface B1 C1 C2 B2, perpendicular to the reference plane, having a radius of 900 mm extending forward for 400 mm and tangential to the plane defined in 1.6.2.1 above along line B1B2;1.6.2.5.an inclined plane C1 D1 D2 C2, perpendicular to the reference plane, joining the surface defined in 1.6.2.4 above and passing 40 mm from the forward external edge of the steering wheel. In the case of a high steering wheel position, this plane extends forward from line B1B2 tangentially to the surface defined in 1.6.2.4 above;1.6.2.6.a vertical plane D1 K1 E1 E2 K2 D2 perpendicular to the reference plane 40 mm forward of the external edge of the steering wheel;1.6.2.7.a horizontal plane E1 F1 P1 N1 N2 P2 F2 E2 passing through a point (90–av) mm below the seat index point (SIP);1.6.2.8.a surface G1 L1 M1 N1 N2 M2 L2 G2, if necessary curved from the bottom limit of the plane defined in 1.6.2.2 above to the horizontal plane defined in 1.6.2.7 above, perpendicular to the reference plane, and in contact with the seat backrest throughout its length;1.6.2.9.two vertical planes K1 I1 F1 E1 and K2 I2 F2 E2 parallel to the reference plane, 250 mm either side of the reference plane, and bounded at the top 300 mm above the plane defined in 1.6.2.7 above;1.6.2.10.two inclined and parallel planes A1 B1 C1 D1 K1 I1 L1 G1 H1 and A2 B2 C2 D2 K2 I2 L2 G2 H2 starting from the upper edge of the planes defined in 1.6.2.9 above and joining the horizontal plane defined in 1.6.2.1 above at least 100 mm from the reference plane on the side where the loading is applied;1.6.2.11.two portions of vertical planes Q1 P1 N1 M1 and Q2 P2 N2 M2 parallel to the reference plane, 200 mm either side of the reference plane, and bounded towards the top 300 mm above the horizontal plane defined in 1.6.2.7 above;1.6.2.12.two portions of I1 Q1 P1 F1 and I2 Q2 P2 F2 of a vertical plane, perpendicular to the reference plane and passing (210–ah) mm in front of the SIP;1.6.2.13.two portions I1 Q1 M1 L1 and I2 Q2 M2 L2 of the horizontal plane passing 300 mm above the plane defined in 1.6.2.7 above.1.6.3Determination of the clearance zone for tractors with a reversible driver’s positionFor tractors with a reversible driver’s position (reversible seat and steering wheel), the zone of clearance is the envelope of the two clearance zones defined by the two different positions of the steering wheel and the seat.1.6.4Optional seats1.6.4.1In case of tractors that could be fitted with optional seats, the envelope comprising the seat index points of all options offered shall be used during the tests. The protective structure shall not enter the larger clearance zone which takes account of these different seat index points.1.6.4.2In the case where a new seat option is offered after the test has been performed, a determination shall be made to see whether the clearance zone around the new SIP falls within the envelope previously established. If it does not, a new test must be performed.1.7Permissible measurement tolerancesLinear dimension± 3 mmexcept for—tyre deflection± 1 mm—structure deflection during horizontal loadings± 1 mm—height of fall of the pendulum block± 1 mmMasses± 1 %Forces± 2 %Angles± 2°1.8Symbols

ah	(mm)	Half of the horizontal seat adjustment
av	(mm)	Half of the vertical seat adjustment
B	(mm)	Minimum overall width of the tractor
B6	(mm)	Maximum outer width of the protective structure
D	(mm)	Deflection of the structure at the point of impact (dynamic tests) or at the point of, and in line with, the load application (static tests)
D′	(mm)	Deflection of the structure for the calculated energy required
Ea	(J)	Strain energy absorbed at point when load is removed. Area contained within F-D curve
Ei	(J)	Strain energy absorbed. Area under F-D curve
E′i	(J)	Strain energy absorbed after additional loading following a crack or tear
E′′i	(J)	Strain energy absorbed in overload test in the event of the load having been removed before starting this overload test. Area under F-D curve
Eil	(J)	Energy input to be absorbed during longitudinal loading
Eis	(J)	Energy input to be absorbed during side loading
F	(N)	Static load force
F′	(N)	Loading force for calculated energy required, corresponding to E′i
F-D		Force/deflection diagram
Fmax	(N)	Maximum static load force occurring during loading, with the exception of the overload
Fv	(N)	Vertical crushing force
H	(mm)	Falling height of the pendulum block (dynamic tests)
H′	(mm)	Falling height of the pendulum block for additional test (dynamic tests)
I	(kgm2)	Tractor reference moment of inertia about the centre line of the rear wheels, whatever the mass of these rear wheels may be
L	(mm)	Tractor reference wheelbase
M	(mm)	Tractor reference mass during strength tests, as defined in section 3.1.1.4. of Annex II

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For extension tests to test reports that originally used seat reference point (SRP), the required measurements shall be made with reference to SRP instead of SIP and the use of SRP shall be clearly indicated (see Annex 1).Users are reminded that the seat index point is determined according to ISO 5353 and is a fixed point with respect to the tractor that does not move as the seat is adjusted away from the mid-position. For purposes of determining the clearance zone, the seat shall be placed in the rear and uppermost position."2.GENERAL REQUIREMENTS2.1.Every protection structure and its attachment to a tractor must be so designed and constructed as to fulfil the essential purpose laid down in Item 1.1 above.2.2.This condition is considered to be fulfilled when the requirements of Annexes II and III are complied with.3.APPLICATION FOR EEC COMPONENT TYPE-APPROVAL3.1.The application for EEC component type-approval with regard to the strength of a protection structure and the strength of its attachment to a tractor shall be submitted by the tractor manufacturer or by the manufacturer of the protecion structure or by their authorized representatives.3.2.The application for EEC component type-approval shall be accompanied by the undermentioned documents in triplicate and by the following particulars:general arrangement drawing either to a scale marked on the drawing or giving the main dimensions of the protection structure. This drawing must, in particular, show details of the mounting components,photographs from side and rear showing mounting details,brief description of the protection structure including type of construction, details of mounting on the tractor and, where necessary, details of cladding, means of access and escape, details of interior padding and features to prevent continuous rolling and details of heating and ventilation,details of materials used in structural parts including attaching brackets and fixing bolts (see Annex V).3.3.A tractor representative of the tractor type for which the protection structure to be approved is intended shall be submitted to the technical service responsible for conducting the component type-approval tests. This tractor shall be fitted with the protection structure.3.4.The holder of EEC component type-approval may request its extension to other tractor types. The competent authority which has granted the original EEC component type-approval shall grant the extension if the approved protection structure and the type(s) of tractor for which the extension is requested comply with the following conditions:the mass of the unballasted tractor, as defined in Item 1.4 of Annex II, does not exceed by more than 5 % the reference mass used in the tests,the wheelbase or the moment of inertia in relation to the rear-wheel axle is not more than the reference wheelbase or moment of inertia,the method of attachment and the points of attachment to the tractor are identical,any components, such as mudguards and bonnet which may provide support for the protection structure have indentical strength and are identically situated with respect to the protection structure,the critical dimensions and the position of the seat and steering wheel relative to the protection structure, and the position relative to the protection structure of the points deemed rigid and takeninto account for the purpose of verifying that the zone of clearance is protected, are such that the zone of clearance continues to be protected by the structure after the latter has undergone the deformation resulting from the various tests.4.MARKINGS4.1.Every protection structure conforming to the approved type shall bear the following markings:4.1.1.The trade mark or name.4.1.2.A component type-approval mark conforming to the model in Annex VI.4.1.3.Serial number of the protection structure.4.1.4.Make and type(s) of tractor(s) for which the protection structure is intended.4.2.All these particulars must appear on a small plate.4.3.These markings must be visible, legible and indelible.ANNEX IITechnical requirementsThe technical requirements for the EC type-approval of rear-mounted roll-over protection structures of narrow-track wheeled agricultural or forestry tractors shall be those set out in point 3 of Code 7 of the OECD Decision C(2008) 128 of October 2008, with the exception of points 3.1.4 (Test report), 3.3.1 (Administrative extensions), 3.4 (Labeling) and 3.6 (Seat belt anchorage performance), reading as follows:"3.RULES AND DIRECTIONS3.1Conditions for testing the strength of protective structures and of their attachment to tractors3.1.1General requirements3.1.1.1Test purposesTests 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.3.1.1.2Test methodsTests may be performed in accordance with the dynamic procedure or the static procedure. The two methods are deemed equivalent.3.1.1.3General rules governing preparation for tests3.1.1.3.1The protective structure must conform to the series production specifications. It shall be attached in accordance with the manufacturer’s recommended method to one of the tractors for which it is designed.Note: A complete tractor is not required for the static strength test; however, the protective structure and parts of the tractor to which it is attached represent an operating installation, hereinafter referred to as "the assembly".3.1.1.3.2For both the static test and the dynamic test the tractor as assembled (or the assembly) must be fitted with all series production components which may affect the strength of the protective structure or which may be necessary for the strength test.Components which may create a hazard in the clearance zone must also be fitted on the tractor (or the assembly) so that they may be examined to see whether the requirements of the Acceptance Conditions in 3.1.3 have been fulfilled. All components of the tractor or the protective structure including weather protective must be supplied or described on drawings.3.1.1.3.3For the strength tests, all panels and detachable non-structural components must be removed so that they may not contribute to the strengthening of the protective structure.3.1.1.3.4The track width must be adjusted so that the protective structure will, as far as possible, not be supported by the tyres during the strength tests. If these tests are conducted in accordance with the static procedure, the wheels may be removed.3.1.1.4Tractor reference mass during strength testsThe reference mass M, used in the formulae to calculate the height of the fall of the pendulum block, the loading energies and the crushing forces, must be at least the mass of the tractor, excluding optional accessories but including coolant, oils, fuel, tools plus the protective structure. Not included are optional front or rear weights, tyre ballast, mounted implements, mounted equipment or any specialised components.3.1.2Tests3.1.2.1Sequence of testsThe sequence of tests, without prejudice to the additional tests mentioned in sections 3.2.1.1.6, 3.2.1.1.7, 3.2.2.1.6 and 3.2.2.1.7, is as follows:1.impact (dynamic test) or loading (static test) at the rear of the structure (see 3.2.1.1.1 and 3.2.2.1.1);2.rear crushing test (dynamic or static test) (see 3.2.1.1.4 and 3.2.2.1.4);3.impact (dynamic test) or loading (static test) at the front of the structure (see 3.2.1.1.2 and 3.2.2.1.2);4.impact (dynamic test) or loading (static test) at the side of the structure (see 3.2.1.1.3 and 3.2.2.1.3);5.crushing at the front of the structure (dynamic or static test) (see 3.2.1.1.5 and 3.2.2.1.5).3.1.2.2General requirements3.1.2.2.1If, during the test, any part of the tractor restraining equipment breaks or moves, the test shall be restarted.3.1.2.2.2No repairs or adjustments of the tractor or protective structure may be carried out during the tests.3.1.2.2.3The tractor gear box shall be in neutral and the brakes off during the tests.3.1.2.2.4If the tractor is fitted with a suspension system between the tractor body and the wheels, it shall be blocked during the tests.3.1.2.2.5The side chosen for application of the first impact (dynamic test) or the first load (static test) on the rear of the structure shall be that which, in the opinion of the testing authorities, will result in the application of the series of impacts or loads under the most unfavourable conditions for the structure. The lateral impact or load and the rear impact or load shall be applied on both sides of the longitudinal median plane of the protective structure. The front impact or load shall be applied on the same side of the longitudinal median plane of the protective structure as the lateral impact or load.3.1.3Acceptance conditions3.1.3.1A protective structure is regarded as having satisfied the strength requirements if it fulfils the following conditions:3.1.3.1.1after each test in the dynamic test procedure, it shall be free from tears or cracks, as defined in 3.2.1.2.1. If during the dynamic test, significant tears or cracks appear, an additional impact test or crushing test as defined in 3.2.1.1.6 or 3.2.1.1.7 must be performed immediately after the test which caused these tears or cracks to appear;3.1.3.1.2during static test, at the point when the energy required is attained in each horizontal load test prescribed or in the overload test the force must be greater than 0,8 F;3.1.3.1.3if during a static test, cracks or tears appear as a result of the application of the crushing force, an additional crushing test as defined in 3.2.2.1.7 must be performed immediately after the crushing test which caused these cracks or tears to appear;3.1.3.1.4during the tests other than the overload test, no part of the protective structure must enter the clearance zone as defined in 1.6 of Annex I;3.1.3.1.5during the tests other than the overload test, all parts of the clearance zone shall be secured by the structure, in accordance with 3.2.1.2.2 and 3.2.2.2.2;3.1.3.1.6during the tests the protective structure must not impose any constraints on the seat structure;3.1.3.1.7the elastic deflection, measured in accordance with 3.2.1.2.3 and 3.2.2.2.3 shall be less than 250 mm.3.1.3.2There shall be no accessories presenting a hazard for the driver. There shall be no projecting part or accessory which is liable to injure the driver should the tractor overturn, or any accessory or part which is liable to trap him – for example by the leg or the foot – as a result of the deflections of the structure.3.1.4[not applicable]3.1.5Apparatus and equipment for dynamic tests3.1.5.1Pendulum block3.1.5.1.1A block acting as a pendulum must be suspended by two chains or wire ropes from pivot points not less than 6 m above the ground. Means must be provided for adjusting independently the suspended height of the block and the angle between the block and the supporting chains or wire ropes.3.1.5.1.2The mass of the pendulum block must be 2000 ± 20 kg excluding the mass of the chains or wire ropes which themselves must not exceed 100 kg. The length of the sides of the impact face must be 680 ± 20 mm (see Figure 7.3). The block must be filled in such a way that the position of its centre of gravity is constant and coincides with the geometrical centre of the parallelepiped.3.1.5.1.3The parallelepiped must be connected to the system which pulls it backwards by an instantaneous release mechanism which is so designed and located as to enable the pendulum block to be released without causing the parallelepiped to oscillate about its horizontal axis perpendicular to the pendulum’s plane of oscillation.3.1.5.2Pendulum supportsThe pendulum pivot points must be rigidly fixed so that their displacement in any direction does not exceed 1 per cent of the height of fall.3.1.5.3Lashings3.1.5.3.1Anchoring rails with the requisite track width and covering the necessary area for lashing the tractor in all the cases illustrated (see Figures 7.4, 7.5 and 7.6) must be rigidly attached to a non-yielding base beneath the pendulum.3.1.5.3.2The tractor shall be lashed to the rails by means of wire rope with round strand, fibre core, construction 6 × 19 in accordance with ISO 2408:2004 and a nominal diameter of 13 mm. The metal strands must have an ultimate tensile strength of 1770 MPa.3.1.5.3.3The central pivot of an articulated tractor shall be supported and lashed down as appropriate for all tests. For the lateral impact test, the pivot shall also be propped from the side opposite the impact. The front and rear wheels need not be in line if this facilitates the attachment of the wire ropes in the appropriate manner.3.1.5.4Wheel prop and beam3.1.5.4.1A softwood beam of 150 mm square shall be used as a prop for the wheels during the impact tests (see Figures 7.4, 7.5 and 7.6).3.1.5.4.2During the lateral impact tests, a softwood beam shall be clamped to the floor to brace the rim of the wheel opposite the side of impact (see Figure 7.6).3.1.5.5Props and lashings for articulated tractors3.1.5.5.1Additional props and lashings must be used for articulated tractors. Their purpose is to ensure that the section of the tractor on which the protective structure is fitted is as rigid as that of a non-articulated tractor.3.1.5.5.2Additional specific details are given in section 3.2.1.1 for the impact and crushing tests.3.1.5.6Tyre pressures and deflections3.1.5.6.1The tractor tyres shall not be liquid-ballasted and shall be inflated to the pressures prescribed by the tractor manufacturer for field work.3.1.5.6.2The lashings shall be tensioned in each particular case such that the tyres undergo a deflection equal to 12 per cent of the tyre wall height (distance between the ground and the lowest point of the rim) before tensioning.3.1.5.7Crushing rigA rig as shown in Figure 7.7 shall be capable of exerting a downward force on a protective structure through a rigid beam approximately 250 mm wide connected to the load-applying mechanism by means of universal joints. Suitable axle stands shall be provided so that the tractor tyres do not bear the crushing force.3.1.5.8Measuring apparatusThe following measuring apparatus is needed:3.1.5.8.1device for measuring the elastic deflection (the difference between the maximum momentary deflection and the permanent deflection, see Figure 7.8).3.1.5.8.2device for checking that the protective structure has not entered the clearance zone and that the latter has remained within the structure’s protective during the test (see section 3.2.2.2.2).3.1.6Apparatus and equipment for static tests3.1.6.1Static testing rig3.1.6.1.1The static testing rig must be designed in such a way as to permit thrusts or loads to be applied to the protective structure.3.1.6.1.2Provision must be made so that the load can be uniformly distributed normal to the direction of loading and along a flange having a length of one of the exact multiples of 50 between 250 and 700 mm. The stiff beam shall have a vertical face dimension of 150 mm. The edges of the beam in contact with the protective structure shall be curved with a maximum radius of 50 mm.3.1.6.1.3The pad shall be capable of being adjusted to any angle in relation to the load direction, in order to be able to follow the angular variations of the structure’s load-bearing surface as the structure deflects.3.1.6.1.4Direction of the force (deviation from horizontal and vertical):at start of test, under zero load: ± 2°,during test, under load: 10° above and 20° below the horizontal. These variations must be kept to a minimum.3.1.6.1.5The deflection rate shall be sufficiently slow, less than 5 mm/s so that the load may at all moments be considered as static.3.1.6.2Apparatus for measuring the energy absorbed by the structure3.1.6.2.1The force versus deflection curve shall be plotted in order to determine the energy absorbed by the structure. There is no need to measure the force and deflection at the point where the load is applied to the structure; however, force and deflection shall be measured simultaneously and co-linearly.3.1.6.2.2The point of origin of deflection measurements shall be selected so as to take account only of the energy absorbed by the structure and/or by the deflection of certain parts of the tractor. The energy absorbed by the deflection and/or the slipping of the anchoring must be ignored.3.1.6.3Means of anchoring the tractor to the ground3.1.6.3.1Anchoring rails with the requisite track width and covering the necessary area for anchoring the tractor in all the cases illustrated must be rigidly attached to a non-yielding base near the testing rig.3.1.6.3.2The tractor must be anchored to the rails by any suitable means (plates, wedges, wire ropes, jacks, etc.) so that it cannot move during the tests. This requirement shall be checked during the test, by means of the usual devices for measuring length.If the tractor moves, the entire test shall be repeated, unless the system for measuring the deflections taken into account for plotting the force versus deflection curve is connected to the tractor.3.1.6.4Crushing rigA rig as shown in Figure 7.7 shall be capable of exerting a downward force on a protective structure through a rigid beam approximately 250 mm wide, connected to the load-applying mechanism by means of universal joints. Suitable axle stands must be provided so that the tractor tyres do not bear the crushing force.3.1.6.5Other measuring apparatusThe following measure devices are also needed:3.1.6.5.1device for measuring the elastic deflection (the difference between the maximum momentary deflection and the permanent deflection, see Figure 7.8).3.1.6.5.2device for checking that the protective structure has not entered the clearance zone and that the latter has remained within the structure’s protective during the test (section 3.3.2.2.2).3.2Test procedures3.2.1Dynamic tests3.2.1.1Impact and crushing tests3.2.1.1.1Impact at the rear3.2.1.1.1.1The tractor shall be so placed in relation to the pendulum block that the block will strike the protective structure when the impact face of the block and the supporting chains or wire ropes are at an angle with the vertical plane A equal to M/100 with a 20° maximum, unless, during deflection, the protective structure at the point of contact forms a greater angle to the vertical. In this case the impact face of the block shall be adjusted by means of an additional support so that it is parallel to the protective structure at the point of impact at the moment of maximum deflection, the supporting chains or wire ropes remaining at the angle defined above.The suspended height of the block shall be adjusted and necessary steps taken so as to prevent the block from turning about the point of impact.The point of impact is that part of the protective structure likely to hit the ground first in a rearward overturning accident, normally the upper edge. The position of the centre of gravity of the block is 1/6 of the width of the top of the protective structure inwards from a vertical plan parallel to the median plane of the tractor touching the outside extremity of the top of the protective structure.If the structure is curved or protruding at this point, wedges enabling the impact to be applied thereon must be added, without thereby reinforcing the structure.3.2.1.1.1.2The tractor must be lashed to the ground by means of four wire ropes, one at each end of both axles, arranged as indicated in Figure 7.4. The spacing between the front and rear lashing points must be such that the wire ropes make an angle of less than 30° with the ground. The rear lashings must in addition be so arranged that the point of convergence of the two wire ropes is located in the vertical plane in which the centre of gravity of the pendulum block travels.The wire ropes must be tensioned so that the tyres undergo the deflections given in 3.1.5.6.2. With the wire ropes tensioned, the wedging beam shall be placed in front of and tight against the rear wheels and then fixed to the ground.3.2.1.1.1.3If the tractor is of the articulated type, the point of articulation shall, in addition, be supported by a wooden block at least 100 mm square and firmly lashed to the ground.3.2.1.1.1.4The pendulum block shall be pulled back so that the height of its centre of gravity above that at the point of impact is given by one of the following two formulae:H = 2,165 × 10–8 M L2orH = 5,73 × 10–2 IThe pendulum block is then released and strikes the protective structure.3.2.1.1.1.5For tractors with a reversible driver’s position (reversible seat and steering wheel), the height shall be whichever is greater of either of the above or either of the following:H = 25 + 0,07 Mfor tractor with a reference mass of less than 2000 kg;H = 125 + 0,02 Mfor tractor with a reference mass of more than 2000 kg.3.2.1.1.2Impact at the front3.2.1.1.2.1The tractor shall be so placed in relation to the pendulum block that the block will strike the protective structure when the impact face of the block and the supporting chains or wire ropes are at an angle with the vertical plane A equal to M/100 with a 20° maximum, unless, during deflection, the protective structure at the point of contact forms a greater angle to the vertical. In this case the impact face of the block shall be adjusted by means of an additional support so that it is parallel to the protective structure at the point of impact at the moment of maximum deflection, the supporting chains or wire ropes remaining at the angle defined above.The suspended height of the pendulum block shall be adjusted and the necessary steps taken so as to prevent the block from turning about the point of impact.The point of impact is that part of the protective structure likely to hit the ground first if the tractor overturned sideways while travelling forward, normally the upper edge. The position of the centre of gravity of the block is 1/6 of the width of the top of the protective structure inwards from a vertical plane parallel to the median plane of the tractor touching the outside extremity of the top of the protective structure.If the structure is curved or protruding at this point, wedges enabling the impact to be applied thereon must be added, without thereby reinforcing the structure.3.2.1.1.2.2The tractor must be lashed to the ground by means of four wire ropes, one at each end of both axles, arranged as indicated in Figure 7.5. The spacing between the front and rear lashing points must be such that the wire ropes make an angle of less than 30° with the ground. The rear lashings must in addition be so arranged that the point of convergence of the two wire ropes is located in the vertical plane in which the centre of gravity of the pendulum block travels.The wire ropes must be tensioned so that the tyres undergo the deflections given in 3.1.5.6.2. With the wire ropes tensioned, the wedging beam shall be placed behind and tight against the rear wheels and then fixed to the ground.3.2.1.1.2.3If the tractor is of the articulated type, the point of articulation shall, in addition, be supported by a wooden block at least 100 mm square and firmly lashed to the ground.3.2.1.1.2.4The pendulum block shall be pulled back so that the height of its centre of gravity above that at the point of impact is given by one of the following two formulae, to be chosen according to the reference mass of the assembly subjected to the tests:H = 25 + 0,07 Mfor tractor with a reference mass of less than 2000 kg;H = 125 + 0,02 Mfor tractor with a reference mass of more than 2000 kg.The pendulum block is then released and strikes the protective structure.3.2.1.1.2.5In case of tractors with a reversible driver’s position (reversible seat and steering wheel):if the protective structure is a rear two-post rollbar, the above formula shall apply,for other types of protective structure, the height shall be whichever is greater from the formula applied above and that selected below:H = 2,165 × 10–8 ML2orH = 5,73 × 10–2 IThe pendulum block is then released and strikes the protective structure.3.2.1.1.3Impact from the side3.2.1.1.3.1The tractor shall be so placed in relation to the pendulum block that the block will strike the protective structure when the impact face of the block and the supporting chains or wire ropes are vertical unless, during deflection, the protective structure at the point of contact forms an angle of less than 20° to the vertical. In this case the impact face of the block shall be adjusted by means of an additional support so that it is parallel to the protective structure at the point of impact at the moment of maximum deflection, the supporting chains or wire ropes remaining vertical on impact.3.2.1.1.3.2The suspended height of the pendulum block shall be adjusted and necessary steps taken so as to prevent the block from turning about the point of impact.3.2.1.1.3.3The point of impact shall be that part of the protective structure likely to hit the ground first in a sideways overturning accident, normally the upper edge. Unless it is certain that another part of this edge would hit ground first, the point of impact shall be in the plane at right angles to the median plane and passing 60 mm in front of the seat index point, the seat being set at the mid-position of longitudinal adjustment.3.2.1.1.3.4For tractors with a reversible driver’s position (reversible seat and steering wheel), the point of impact shall be in the plane at right angles to the median plane and passing at the midpoint of the segment joining the two seat index points defined by joining the two different positions of the seat. For protective structures having a two-post system, the impact shall be located on one of the two posts.3.2.1.1.3.5The tractor wheels on the side which is to receive the impact must be lashed to the ground by means of wire ropes passing over the corresponding ends of the front and rear axles. The wire ropes must be tensioned to produce the tyre deflection values given in 3.1.5.6.2.With the wire ropes tensioned, the wedging beam shall be placed on the ground, pushed tight against the tyres on the side opposite that which is to receive the impact and then fixed to the ground. It may be necessary to use two beams or wedges if the outer sides of the front and rear tyres are not in the same vertical plane. The prop shall then be placed as indicated in Figure 7.6 against the rim of the most heavily loaded wheel opposite to the point of impact, pushed firmly against the rim and then fixed at its base. The length of the prop shall be such that it makes an angle of 30 ± 3° with the ground when in position against the rim. In addition, its thickness shall, if possible, be between 20 and 25 times less than its length and between 2 and 3 times less than its width. The props shall be shaped at both ends as shown in the details on Figure 7.6.3.2.1.1.3.6If the tractor is of the articulated type, the point of articulation shall in addition be supported by a wooden block at least 100 mm square and laterally supported by a device similar to the prop pushed against the rear wheel as in 3.2.1.1.3.2. The point of articulation shall then be lashed firmly to the ground.3.2.1.1.3.7The pendulum block shall be pulled back so that the height of its centre of gravity above that at the point of impact is given by one of the following two formulae, to be chosen according to the reference mass of the assembly subjected to the tests:H = 25 + 0,20 Mfor tractors with a reference mass of less than 2000 kg;H = 125 + 0,15 Mfor tractors with a reference mass of more than 2000 kg.3.2.1.1.3.8In case of tractors with a reversible driver’s position (reversible seat and steering wheel):if the protective structure is a rear two-post rollbar, the selected height shall be whichever is greater from the formulae applicable above and below:H = (25 + 0,20 M) (B6 + B) / 2Bfor tractor with a reference mass of less than 2000 kg;H = (125 + 0,15 M) (B6 + B) / 2Bfor tractor with a reference mass of more than 2000 kg.for other types of protective structures, the selected height shall be whichever is greater from the formulae applicable above and below:H = 25 + 0,20 Mfor tractor with a reference mass less than 2000 kg;H = 125 + 0,15 Mfor tractor with a reference mass of more than 2000 kg.The pendulum block is then released and strikes the protective structure.3.2.1.1.4Crushing at the rearThe beam shall be positioned over the rear uppermost structural member(s) and the resultant of crushing forces shall be located in the tractor’s median plane A force Fv shall be applied where:Fv = 20 MThe force Fv shall be maintained for five seconds after the cessation of any visually detectable movement of the protective structure.Where the rear part of the protective structure roof will not sustain the full crushing force, the force shall be applied until the roof is deflected to coincide with the plane joining the upper part of the protective structure with that part of the rear of the tractor capable of supporting the tractor when overturned.The force shall then be removed, and the crushing beam repositioned over that part of the protective structure which would support the tractor when completely overturned. The crushing force Fv shall then be applied again.3.2.1.1.5Crushing at the frontThe beam shall be positioned across the front uppermost structural member(s) and the resultant of crushing forces shall be located in the tractor’s median plane. A force Fv shall be applied where:Fv = 20 MThe force Fv shall be maintained for five seconds after the cessation of any visually detectable movement of the protective structure.Where the front part of the protective structure roof will not sustain the full crushing force, the force shall be applied until the roof is deflected to coincide with the plane joining the upper part of the protective structure with that part of the front of the tractor capable of supporting the tractor when overturned.The force shall then be removed, and the crushing beam repositioned over that part of the protective structure which would support the tractor when completely overturned. The crushing force Fv shall then be applied again.3.2.1.1.6Additional impact testsIf cracks or tears which cannot be considered negligible appear during an impact test, a second, similar test, but with a height of fall of:H’ = (H × 10–1) (12 + 4a) (1 + 2a)–1shall be performed immediately after the impact tests causing these tears or cracks to appear, "a" being the ratio of the permanent deformation (Dp) to the elastic deformation (De):a = Dp / Deas measured at the point of impact. The additional permanent deformation due to the second impact shall not exceed 30 per cent of the permanent deformation due to the first impact.In order to be able to carry out the additional test, it is necessary to measure the elastic deformation during all the impact tests.3.2.1.1.7Additional crushing testsIf during a crushing test, significant cracks or tears appear, a second, similar, crushing test, but with a force equal to 1,2 Fv shall be performed immediately after the crushing tests which caused these tears or cracks to appear.3.2.1.2Measurements to be made3.2.1.2.1Fractures and cracksAfter each test all structural members, joints and fastening systems shall be visually examined for fractures or cracks, any small cracks in unimportant parts being ignored.Any tears caused by the edges of the pendulum weight are to be ignored.3.2.1.2.2Entry into the clearance zoneDuring each test the protective structure shall be examined to see whether any part it has entered a clearance zone round the driving seat as defined in 1.6.Furthermore, the clearance zone shall not be outside the protection of the protective structure. For this purpose, it shall be considered to be outside the protection of the structure if any part of it would come in contact with flat ground if the tractor overturned towards the direction from which the test load is applied. For estimating this, the front and rear tyres and track width setting shall be the smallest standard fitting specified by the manufacturer.3.2.1.2.3Elastic deflection (under side impact)The elastic deflection shall be measured (810 + av) mm above the seat index point, in the vertical plane in which the load is applied. For this measurement, any apparatus similar to that illustrated in Figure 7.8 may be used.3.2.1.2.4Permanent deflectionAfter the final crushing test, the permanent deflection of the protective structure shall be recorded. For this purpose, before the start of the test, the position of the main roll-over protective structure members in relation to the seat index point shall be used.3.2.2Static tests3.2.2.1Loading and crushing tests3.2.2.1.1Loading at the rear3.2.2.1.1.1The load shall be applied horizontally, in a vertical plane parallel to the tractor’s median plane.The load application point shall be that part of the roll-over protective structure likely to hit the ground first in a rearward overturning accident, normally the upper edge. The vertical plane in which the load is applied shall be located at a distance of one third of the external width of the upper part of the structure from the median plane.If the structure is curved or protruding at this point, wedges enabling the load to be applied thereon shall be added, without thereby reinforcing the structure.3.2.2.1.1.2The assembly shall be lashed to the ground as described in 3.1.6.3.3.2.2.1.1.3The energy absorbed by the protective structure during the test shall be at least:Eil = 2,165 × 10–7 M L2orEil = 0,574 × I3.2.2.1.1.4For tractors with a reversible driver’s position (reversible seat and steering wheel), the energy shall be whichever is the higher of the formula selected above or the followisng:Eil = 500 + 0,5 M3.2.2.1.2Loading at the front3.2.2.1.2.1The load shall be applied horizontally in a vertical plane parallel to the tractor’s median plane. The point of application shall be that part of the protective structure likely to hit the ground first if the tractor overturns sideways while travelling forward, i.e. normally the upper edge. The point of application of the load shall be 1/6 of the width of the top of the protective structure inwards from a vertical plane parallel to the median plane of the tractor touching the outside extremity of the top of the protective structure.If the structure is curved or protruding at this point, wedges enabling the load to be applied thereon shall be added, without thereby reinforcing the structure.3.2.2.1.2.2The assembly shall be lashed to the ground as described in 3.1.6.3.3.2.2.1.2.3The energy absorbed by the protective structure during the test shall be at least:Eil = 500 + 0,5 M3.2.2.1.2.4In case of tractors with a reversible driver’s position (reversible seat and steering wheel):if the protective structure is a rear two-post rollbar the preceding formula shall also apply,for other types of protective structures, the energy shall be whichever is the higher of the above or either of the following as selected:Eil = 2,165 × 10–7 ML2orEil = 0,574 I3.2.2.1.3Loading from the side3.2.2.1.3.1The side loading shall be applied horizontally, in a vertical plane perpendicular to the tractor’s median plane passing 60 mm in front of the seat index point, the seat being at the mid-position of the longitudinal adjustment. The load application point shall be that part of the roll-over protective structure likely to hit the ground first in a sideways overturning accident, normally the upper edge.3.2.2.1.3.2The assembly shall be lashed to the ground as described in 3.1.6.3.3.2.2.1.3.3The energy absorbed by the protective structure during the test shall be at least:Eis = 1,75 M3.2.2.1.3.4For tractors with a reversible driver’s position (reversible seat and steering wheel), the load application point shall be in the plane at right angles to the median plane and passing at the midpoint of the segment joining the two seat index points defined by joining the two different positions of the seat. For protective structures having a two-post system, the load shall be located on one of the two posts.3.2.2.1.3.5In case of tractors with a reversible driver’s position (reversible seat and steering wheel) where the protective structure is a rear two-post rollbar, the energy shall be whichever is higher of the following:Eis = 1,75 MorEis = 1,75 M (B6 + B)/2B3.2.2.1.4Crushing at the rearAll provisions are identical to those given in 3.2.1.1.4.3.2.2.1.5Crushing at the frontAll provisions are identical to those given in 3.2.1.1.5.3.2.2.1.6Additional overload test (Figures 7.9 to 7.11)An overload test shall be carried out in all cases where the force decreases by more than 3 per cent during the last 5 per cent of the deflection reached when the energy required is absorbed by the structure (see Figure 7.10).The overload test involves the gradual increase of the horizontal load by increments of 5 per cent of the initial energy requirement up to a maximum of 20 per cent of energy added (see Figure 7.11).The overload test is satisfactory if, after each increase by 5, 10, or 15 per cent in the energy required, the force decreases by less than 3 per cent for a 5 per cent increment and remains greater than 0,8 Fmax.The overload test is satisfactory if, after the structure has absorbed 20 per cent of the added energy, the force exceeds 0,8 Fmax.Additional cracks or tears and/or entry into or lack of protective of the clearance zone due to elastic deflection are permitted during the overload test. However, after the removal of the load, the structure shall not enter the clearance zone, which shall be completely protected.3.2.2.1.7Additional crushing testsIf cracks or tears which cannot be considered as negligible appear during a crushing test, a second, similar crushing, but with a force of 1,2 Fv shall be applied immediately after the crushing test which caused the cracks or tears to appear.3.2.2.2Measurements to be made3.2.2.2.1Fractures and cracksAfter each test all structural members, joints and attachment systems shall be visually examined for fractures or cracks, any small cracks in unimportant parts being ignored.3.2.2.2.2Entry into the clearance zoneDuring each test the protective structure shall be examined to see whether any part of it has entered a clearance zone as defined in 1.6 of Annex I.In addition, an examination shall be made to determine whether any part of the clearance zone is outside the protection of the structure. For this purpose it is considered to be outside the protection of the roll-over protective structure if any part of it would have come in contact with the ground plane if the tractor had overturned in the direction from which the impact came. For this purpose the front and rear tyres and track setting are assumed to be the smallest specified by the manufacturer.3.2.2.2.3Elastic deflection under side loadingThe elastic deflection shall be measured (810 + av) mm above the seat index point, in the vertical plane in which the load is applied. For this measurement, any apparatus similar to that illustrated in Figure 7.8 may be used.3.2.2.2.4Permanent deflectionAfter the final crushing test, the permanent deflection of the protective structure shall be recorded. For this purpose, before the start of the test, the position of the main roll-over protective structure members in relation to the seat index point shall be used.Extension to other tractor models3.3.1[not applicable]3.3.2Technical extensionWhen technical modifications occur on the tractor, the protective structure or the method of attachment of the protective structure to the tractor, the testing station that has carried out the original test can issue a "technical extension report" in the following cases:3.3.2.1Extension of the structural test results to other models of tractorsThe impact and crushing tests need not be carried out on each model of tractor, provided that the protective structure and tractor comply with the conditions referred to hereunder 3.3.2.1.1 to 3.3.2.1.5.3.3.2.1.1The structure shall be identical to the one tested.3.3.2.1.2The required energy shall not exceed the energy calculated for the original test by more than 5 per cent.3.3.2.1.3The method of attachment and the tractor components to which the attachment is made shall be identical.3.3.2.1.4Any components such as mudguards and bonnet that may provide support for the protective structure shall be identical.3.3.2.1.5The position and critical dimensions of the seat in the protective structure and the relative position of the protective structure on the tractor shall be such that the clearance zone would have remained within the protection of the deflected structure throughout all tests (this shall be checked by using the same reference of clearance zone as in the original test report, respectively Seat Reference Point [SRP] or Seat Index Point [SIP]).3.3.2.2Extension of the structural test results to modified models of the protective structureThis procedure has to be followed when the provisions of paragraph 3.3.2.1 are not fulfilled, it may not be used when the method of attachment of the protective structure to the tractor does not remain of the same principle (e.g. rubber supports replaced by a suspension device):3.3.2.2.1Modifications having no impact on the results of the initial test (e.g. weld attachment of the mounting plate of an accessory in a non-critical location on the structure), addition of seats with different SIP location in the protective structure (subject to checking that the new clearance zone(s) remain(s) within the protection of the deflected structure throughout all tests).3.3.2.2.2Modifications having a possible impact on the results of the original test without calling into question the acceptability of the protective structure (e.g. modification of a structural component, modification of the method of attachment of the protective structure to the tractor). A validation test can be carried out and the test results will be drafted in the extension report.The following limits for this type extension are fixed:3.3.2.2.2.1no more than 5 extensions may be accepted without a validation test;3.3.2.2.2.2the results of the validation test will be accepted for extension if all the acceptance conditions of the Code are fulfilled and:if the deflection measured after each impact test does not deviate from the deflection measured after each impact test in the original test report by more than ± 7 % (in case of a dynamic test);if the force measured when the required energy level has been reached in the various horizontal load tests does not deviate from the force measured when the required energy has been reached in the original test by more than ± 7 % and the deflection measuredPermanent + elastic deflection measured at the point when the required energy level is obtained." when the required energy level has been reached in the various horizontal load tests does not deviate from the deflection measured when the required energy has been reached in the original test by more than ± 7 % (in case of a static test).3.3.2.2.2.3more than one protective structure modifications may be included in a single extension report if they represent different options of the same protective structure, but only one validation test can be accepted in a single extension report. The options not tested shall be described in a specific section of the extension report.3.3.2.2.3Increase of the reference mass declared by the manufacturer for a protective structure already tested. If the manufacturer wants to keep the same approval number it is possible to issue an extension report after having carried out a validation test (the limits of ± 7 % specified in 3.3.2.2.2.2 are not applicable in such a case).3.4[not applicable]3.5Cold weather performance of protective structures3.5.1If the protective structure is claimed to have properties resistant to cold weather embrittlement, the manufacturer shall give details that shall be included in the report.3.5.2The following requirements and procedures are intended to provide strength and resistance to brittle fracture at reduced temperatures. It is suggested that the following minimum material requirements shall be met in judging the protective structure’s suitability at reduced operating temperatures in those countries requiring this additional operating protection.3.5.2.1Bolts and Nuts used to attach the protective structure to the tractor and used to connect structural parts of the protective structure shall exhibit suitable controlled reduced temperature toughness properties.3.5.2.2All welding electrodes used in the fabrication of structural members and mounts shall be compatible with the protective structure material as given in 3.5.2.3 below.3.5.2.3Steel materials for structural members of the protective structure shall be of controlled toughness material exhibiting minimum Charpy V-Notch impact energy requirements as shown in Table 7.1. Steel grade and quality shall be specified in accordance with ISO 630:1995.Steel with an as-rolled thickness less than 2,5 mm and with a carbon content less than 0,2 per cent is considered to meet this requirement.Structural members of the protective structure made from materials other than steel shall have equivalent low temperature impact resistance.3.5.2.4When testing the Charpy V-Notch impact energy requirements, the specimen size shall be no less than the largest of the sizes stated in Table 7.1 that the material will permit.3.5.2.5The Charpy V-Notch tests shall be made in accordance with the procedure in ASTM A 370-1979, except for specimen sizes that shall be in accordance with the dimensions given in Table 7.1.

Table 7.1Minimum Charpy V-notch impact energiesIndicates preferred size. Specimen size shall be no less than largest preferred size that the material permits.The energy requirement at – 20 °C is 2,5 times the value specified for – 30 °C. Other factors affect impact energy strength, i.e. direction of rolling, yield strength, grain orientation and welding. These factors shall be considered when selecting and using steel.

Specimen size	Energy at	Energy at
	–30 °C	–20 °C
mm	J	J
10 × 10	11	27,5
10 × 9	10	25
10 × 8	9,5	24
10 × 7,5	9,5	24
10 × 7	9	22,5
10 × 6,7	8,5	21
10 × 6	8	20
10 × 5	7,5	19
10 × 4	7	17,5
10 × 3,5	6	15
10 × 3	6	15
10 × 2,5	5,5	14

3.5.2.6Alternatives to this procedure are the use of killed or semi-killed steel for which an adequate specification shall be provided. Steel grade and quality shall be specified in accordance with ISO 630:1995, Amd 1:2003.3.5.2.7Specimens are to be longitudinal and taken from flat stock, tubular or structural sections before forming or welding for use in the protective structure. Specimens from tubular or structural sections are to be taken from the middle of the side of greatest dimension and shall not include welds.3.6[not applicable]Figure 7.1Clearance zone

Figure 7.1.aSide viewSection in reference plan

Figure 7.1.bRear view

Figure 7.1.cSeen from aboveFigure 7.2.aClearance zone for tractors with reversible seat position: two-post rollbarFigure 7.2.bClearance zone for tractors with reversible seat position: other types of ROPSFigure 7.3Pendulum block and its suspending chains or wire ropesFigure 7.4Example of tractor lashing (rear impact)Figure 7.5Example of tractor lashing (front impact)Figure 7.6Example of tractor lashing (side impact)Figure 7.7Example of crushing rig of the tractorFigure 7.8Example of apparatus for measuring elastic deflectionFigure 7.9Force/deflection curveOverload test not necessaryFigure 7.10Force/deflection curveOverload test necessaryFigure 7.11Force/deflection curveOverload test to be continued

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Permanent + elastic deflection measured at the point when the required energy level is obtained."Indicates preferred size. Specimen size shall be no less than largest preferred size that the material permits.The energy requirement at – 20 °C is 2,5 times the value specified for – 30 °C. Other factors affect impact energy strength, i.e. direction of rolling, yield strength, grain orientation and welding. These factors shall be considered when selecting and using steel.ANNEX IIITEST PROCEDUREA.Dynamic tests1.IMPACT AND CRUSHING TESTS1.1.Impact at the rear1.1.1.The tractor shall be so placed in relation to the pendulum block that the block will strike the protection structure when the impact face of the block and the supporting chains or wire ropes are at an angle with the vertical plane equal to mt/100 with a 20° maximum, unless, during deflection, the protection structure at the point of contact forms a greater angle to the vertical. In this case the impact face of the block shall be adjusted by means of an additional support so that it is parallel to the protection structure at the point of impact at the moment of maximum deflection, the supporting chains or wire ropes remaining at the angle defined above.The suspended height of the block shall be adjusted, and necessary steps taken so as to prevent the block from turning about the point of contact.The point of impact shall be that part of the protection structure likely to hit the ground first in a rearward overturning accident, normally the upper edge. The position of the centre of gravity of the block shall be one-sixth of the width of the top of the protection structure inwards from a vertical plane parallel to the median plane of the tractor touching the outside extremity of the top of the protection structure.If the structure is curved or protruding at this point, wedges enabling the impact to be applied thereon will have to be added, without thereby reinforcing the structure.1.1.2.The tractor shall be lashed to the ground by means of four wire ropes, one at each end of both axles, arranged as indicated in Figure 5 of Annex IV. The front and rear lashing points shall be located at a distance such that the wire ropes make an angle of less than 30° with the ground. The rear lashings shall in addition be so arranged that the point of convergence of the two wire ropes is located in the vertical plane in which the centre of gravity of the block travels.The wire ropes must be tensioned such that the tyres undergo the deflections given in Item 6.2 of Annex II A.With the wire ropes tensioned, the wedging beam shall be placed in front of and tight against the rear wheels and then fixed to the ground.1.1.3.If the tractor is of the articulated type, the point of articulation shall, in addition, be supported by a wooden block at least 100 mm square and firmly lashed to the ground.1.1.4.The pendulum block shall be pulled back so that the height of its centre of gravity above that at the point of impact is given by one of the following two formulae:H = 2,165 × 10-8 mt L2 or H = 5,73 × 10-2 I.The block must then be released so as to strike the protection structure.1.2.Impact at the front1.2.1.The tractor shall be so placed in relation to the pendulum block that the block will strike the protection structure when the impact face of the block and the supporting chains or wire ropes are at an angle with the vertical plane, equal to mt/100 with a 20° maximum, unless, during deflection, the protection structure at the point of contact forms a greater angle to the vertical. In this case the impact face of the block shall be adjusted by means of an additional support so that it is parallel to the protection structure at the point of impact at the moment of maximum deflection, the supporting chains or wire ropes remaining at the angle defined above.The suspended height of the pendulum block shall be adjusted and necessary steps taken so as to prevent the block from turning about the point of contact.The point of impact shall be that part of the protection structure likely to hit the ground first if the tractor overturns sideways while travelling forward, normally the upper edge. The position of thecentre of gravity of the block shall be one-sixth of the width of the top of the protection structure inwards from a vertical plane parallel to the median plane of the tractor touching the outside extremity of the top of the protection structure.If the structure is curved or protruding at this point, wedges enabling the impact to be applied thereon will have to be added, without thereby reinforcing the structure.1.2.2.The tractor shall be lashed to the ground by means of four wire ropes, one at each end of both axles, arranged as indicated in Figure 6 of Annex IV. The front and rear lashing points shall be located at a distance such that the wire ropes make an angle of less than 30° with the ground. The rear lashings shall, in addition, be so arranged that the point of convergence of the two wire ropes is located in the vertical plane in which the centre of gravity of the pendulum block travels.The wire ropes must be tensioned such that the tyres undergo the deflections given in Item 6.2 of Annex II A.With the wire ropes tensioned, the wedging beam shall be placed firmly behind the rear wheels and then fixed to the ground.1.2.3.If the tractor is of the articulated type, the point of articulation shall in addition be supported by a wooden block at least 100 mm square and firmly lashed to the ground.1.2.4.The pendulum block shall be pulled back so that the height of its centre of gravity above that at the point of impact is given by one of the following two formulae, to be chosen according to the reference mass of the tractors subjected to the tests:H = 25 + 0,07 mt for tractors with a reference mass of less than 2000 kilograms,H = 125 + 0,02 mt for tractors with a reference mass of more than 2000 kilograms.The pendulum block must then be released so as to strike the protection structure.1.3.Impact from the side1.3.1.The tractor shall be so placed in relation to the pendulum block that the block will strike the protection structure when the impact face of the weight and the supporting chains or wire ropes are vertical unless, during deflection, the protection structure at the point of contact forms an angle to the vertical. In this case the impact face of the block shall be adjusted by means of an additional support so that it is parallel to the protection structure at the point of impact at the moment of maximum deflection, the supporting chains or wire ropes remaining vertical on impact.The suspended height of the block shall be adjusted and necessary steps taken so as to prevent the block from turning about the point of contact.The point of impact shall be that part of the protection structure likely to hit the ground first in a sideways overturning accident, normally the upper edge. Unless it is certain that another part of this edge would hit the ground first, the point of impact shall be in the plane at right angles to the median plane and passing 200 mm in front of the seat reference point, the seat being set at the mid position of the longitudinal seat adjustment.1.3.2.The tractor wheels on the side which is to receive the impact shall be lashed to the ground by means of wire ropes passing over the corresponding ends of the front and rear axles. The wire ropes shall be tensioned to produce the tyre deflection values given in Item 6.2 of Annex II A on the side which is to receive the impact.With the wire ropes tensioned, the wedging beam shall be placed on the ground, pushed tight against the tyres on the side opposite that which is to receive the impact and then fixed to the ground. It may be necessary to use two beams or wedges if the outer sides of the front and rear tyres are not in the same vertical plane.The prop shall then be placed as indicated in Figure 7 of Annex IV against the rim of the wheel opposite to the impact, pushed firmly against the rim and then fixed at its base.The length of the rop shall be chosen such that it makes an angle of 30 ± 3° with the ground when in position against the rim. In addition, its length must, if possible, be between 20 and 25 times greater than its thickness and its width between two and three times greater than its thickness. The props shall be shaped at both ends as shown in the details of Figure 7 of Annex IV.1.3.3.If the tractor is of the articulated type, the point of articulation shall, in addition, be supported by a wooden block at least 100 mm square and laterally supported by a device similar to that provided for in Item 1.3.2 against the rear wheel. The point of articulation shall then be lashed firmly to the ground.1.3.4.The pendulum block shall be pulled back so that the height of its centre of gravity above that at the point of impact is given by one of the following two formulae, to be chosen according to the reference mass of the tractors subjected to the tests:H = 25 + 0,20 mt for tractors with a reference mass of less than 2000 kilograms,H = 125 + 0,15 mt for tractors with a reference mass of more than 2000 kilograms.The pendulum block must then be released so as to strike the protection structure.1.4.Crushing at the rearThe beam shall be positioned over the rear uppermost structural member(s) and the resultant of the crushing forces shall be located in the tractor's median plane.A force, Fv = 20 mt shall be applied.Where the rear part of the protection structure roof will not sustain the full crushing force, the force shall be applied until the roof is deflected to coincide with the plane joining the upper part of the protection structure with that part of the rear of the tractor capable of supporting the vehicle's mass when overturned.The force shall then be removed, and the tractor or loading force repositioned so that the beam is over that point of the protection structure which would then support the tractor when completely overturned.The force Fv shall then be applied.It shall be applied for a minimum of five seconds following the cessation of any visually detectable deflection.1.5.Crushing at the frontThe beam shall be positioned over the front uppermost structural member(s) and the resultant of the crushing forces shall be located in the tractor's median plane.A force, Fv = 20 mt shall be applied.Where the front part of the protection structure roof will not sustain the full crushing force, the force shall be applied until the roof is deflected to coincide with the plane joining the upper part of the protection structure with that part of the front of the tractor capable of supporting the vehicle's mass when overturned.The force shall then be removed, and the tractor or loading force repositioned so that the beam is over that point of the protection structure which would then support the tractor when completely overturned.The force Fv shall then be applied.It shall be applied for a minimum of five seconds following the cessation of any visually detectable deflection.1.6.Additional tests1.6.1.If cracks or tears which cannot be considered negligible appear during an impact test, a second, similar test, but with a height of fall of:H′ = H10 × 12 + 4a1 + 2ashall be performed immediately after the impact test causing these tears or cracks to appear, "a" being the ratio of the permanent deformation to the elastic deformation (a = Dp/De) as measured at the point of impact.The additional permanent deformation due to the second impact must not exceed 30 % of the permanent deformation due to the first impact.In order to be able to carry out the additional test, it is necessary to measure the elastic deformation during all of the impact tests.1.6.2.If, during a crushing test, significant tears or cracks appear, a second, similar crushing test, but with a force equal to 1,2 Fv, shall be performed immediately after the crushing test which caused these tears and cracks to appear.2.ZONE OF CLEARANCE2.1.The zone of clearance is shown in Figures 1, 2a, 2b, 2c, 2d and 2e of Annex IV.The zone is defined on the basis of a "vertical reference plane", generally longitudinal to the tractor and passing through the seat reference point and the centre of the steering wheel. This plane must be able to move horizontally with the seat and the steering wheel during the impact but to remain perpendicular to the floor of the tractor or of the protection structure if this is resiliently mounted.2.2.The zone is bounded by the following planes, the tractor being on a horizontal surface and, where the steering wheel is adjustable, its position adjusted for normal seated driving.2.2.1.A horizontal plane — A1B1B2A2 — 900 mm above the seat reference point.2.2.2.An inclined plane — H1H2G2G1 — perpendicular to the vertical reference plane and including a point 900 mm directly above the seat reference point and the rearmost point of the seat backrest.2.2.3.A cylindrical surface — A1A2H2H1 — which is perpendicular to the reference plane, has a radius of 120 mm and is tangential to the planes defined above in Items 2.2.1 and 2.2.2.2.2.4.A cylindrical surface — B1C1C2B2 — perpendicular to the reference plane, having a radius of 900 mm and extending forward by 400 mm the plane defined in Item 2.2.1 above, to which it is tangential, following a horizontal line 150 mm forward of the seat reference point.2.2.5.A inclined plane — C1D1D2C2 — perpendicular to the reference plane, extending the surface defined in Item 2.2.4 above and passing through a point 40 mm from the outer edge of the steering wheel.2.2.6.A vertical plan — D1K1E1E2K2D2 — perpendicular to the reference plane and passing 40 mm in front of the other edge of the steering wheel.2.2.7.A horizontal plane — E1F1P1N1N2P2F2E2 — passing through the seat reference point.2.2.8.A curvilinear surface — G1L1M1N1N1M2L2G2 — perpendicular to the reference plaen and in contact with the back of the seat backrest.2.2.9.Two vertical planes — K1I1F1E1 and K2I2F2E2 — parallel to the reference plane, 250 mm either side of this plane, and bounded towards the top 300 mm above the horizontal plane passing through the seat reference point.2.2.10.Two inclined and parallel planes — A1B1C1D1K1I1L1G1H1 and A2B2C2D2K2I2L2G2H2 — starting from the upper edge of the planes defined in Item 2.2.9 above and joining the horizontal plane defined in Item 2.2.1 above at least 100 mm from the reference plane on the side where the impact is applied.2.2.11.Two vertical planes — Q1P1N1M1 and Q2P2N2M2 — parallel to the reference plane, 200 mm either side of this plane, and bounded towards the top 300 mm above the horizontal plane passing through the seat reference point.2.2.12.Two portions — I1Q1P1F1 and I2Q2P2F2 — of a vertical plane, perpendicular to the reference plane and passing 350 mm in front of the seat reference point.2.2.13.Two portions — I1Q1M1L1 — and I2Q2M2L2 — of the horizontal plane passing 300 mm above the seat reference point.2.3.Seat location and seat reference point2.3.1Seat reference point2.3.1.1.The refernce point shall be established using the apparatus illustrated in Figures 3 and 3b of Annex IV. The apparatus shall consist of a seat pan board and backrest boards. The lower backrest board shall be jointed in the region of the ischium humps (A) and loin (B), the joint (B) being adjustable in height.2.3.1.2.The reference point is defined as the point in the median longitudinal plane of the seat where the tangential plane of the lower backrest and a horizontal plane intersect. This horizontal plane cuts the lower surface of the seat pan board 150 mm in front of the abovementioned tangent.2.3.1.3.The apparatus shall be positioned on the seat. It shall then be loaded with a force of 550 N at a point 50 mm in front of joint (A), and the two parts of the backrest board shall be lightly pressed tangentially against the backrest.2.3.1.4.If it is not possible to determine definite tangents to each area of the backrest (above and below the lumbar region) the following must be done:2.3.1.4.1.Where no definite tangent to the lower area is possible the lower part of the backrest board is pressed against the backrest vertically.2.3.1.4.2.Where no definite tangent to the upper area is possible the joint (B) is fixed at a height of 230 mm above the lower surface of the seat pan board, the backrest board being perpendicular to the latter. Then the two parts of the backrest board are lightly pressed against the backrest.2.3.2.Seat position and adjustment for determining the location of the seat reference point2.3.2.1.Where the seat position is adjustable, the seat must be adjusted to its rear uppermost position.2.3.2.2.Where the inclination of the backrest and seat pan is adjustable, these must be adjusted so that the reference point is in its rear uppermost position.2.3.2.3.Where the seat is equipped with suspension, the latter must be blocked at mid-travel, unless this is contrary to the instructions clearly laid down by the seat manufacturer.3.MEASUREMENTS TO BE MADE3.1.Fractures and cracksAfter each test all structural members, joints and fastening systems shall be visually examined for fractures or cracks, any small cracks in unimportant parts being ignored.Any tears caused by the edges of the pendulum weight shall be ignored.3.2.Zone of clearance3.2.1.During each test an examination shall be made to see whether any part of the protection structure has entered the zone of clearance round the driver's seat as defined in Item 2 of this Annex.3.2.2.In addition, an examination shall be made to determine whether any part of the zone of clearance is outside the protection of the protection structure. For this purpose it shall be considered to be outside the protection of the roll-over protection structure if any part of it would have come into contact with flat ground if the tractor had overturned towards the direction from which the impact came. For this purpose the front and rear tyre and track setting shall be assumed to be the smallest specified by the manufacturer.3.3.Elastic deflection (on side impact)The elastic deflection shall be measured 900 mm above the seat reference point, in the vertical plane passing through the point of impact. For this measurement, apparatus as shown in Figure 9 of Annex IV shall be used.3.4.Permanent deflectionAfter the final crushing test, the permanent deflection of the protection structure shall be recorded. For this purpose, before the start of the test, the position of the main protection structure members in relation to the seat reference point shall be recorded.B.Static tests1.LOADING AND CRUSHING TESTS1.1.Loading at the rear1.1.1.The load shall be applied horizontally, in a vertical plane parallel to the tractor's median plane.The load application point shall be that part of the protection structure likely to hit the ground first in a rearward overturning accident, normally the upper edge. The vertical plane in which the load is applied shall be located at a distance of one-third of the external width of the upper part of the structure from the median plane.If the structure is curved or protruding at this point, wedges enabling the load to be applied thereon will have to be added, without thereby reinforcing the structure.1.1.2.The assembly defined in Item 1.3.1 of Annex II shall be lashed to the ground as described in Item 3 of Annex II B.1.1.3.The energy absorbed by the protection structure during the test shall be at least 1.2.Loading at the front1.2.1.The load shall be applied horizontally in a vertical plane parallel to the tractor's median plane.The point of application shall be that part of the protection structure likely to hit the ground first if the tractor overturns sideways while travelling forward, i.e. normally the upper egde. The point of application of the load shall be one-sixth of the width of the top of the protection structure inwards from a vertical plane parallel to the median plane of the tractor touching the outside extremity of the top of the protection structure.If the structure is curved or protruding at this point, wedges enabling the load to be applied thereon will have to be added, without thereby reinforcing the structure.1.2.2.The assembly defined in Item 1.3.1 of Annex II shall be anchored to the ground as described in Item 3 of Annex II B.1.2.3.The energy absorbed by the protection structure during the test shall be at least 1.3.Loading from the side1.3.1.The side loading shall be applied horizontally, in a vertical plane perpendicular to the tractor's median plane and passing 200 mm in front of the seat reference point, the seat being at the mid position of the longitudinal seat adjustment.The load application point shall be that part of the protection structure likely to hit the ground first in a sideways overturning accident, normally the upper edge.1.3.2.The assembly defined in Item 1.3.1 of Annex II shall be lashed to the ground as described in Item 3 of Annex II B.1.3.3.The energy absorbed by the protection structure during the test shall be at least 1.4.Crushing at the rearAll provisions are identical to those given in Item 1.4 of Annex III A.1.5.Crushing at the frontAll provisions are identical to those given in Item 1.5 of Annex III A.1.6.Overload test1.6.1.An overload test shall be carried out where the force decreases by more than 3 % during the last 5 % of the deflection reached when the energy required is absorbed by the structure (see Figure 10b of Annex IV).1.6.2.The overload test involves the gradual increase of the horizontal load by increments of 5 % of the initial energy requirement up to a maximum of 20 % of energy added (see Figure 10c of Annex IV).1.6.2.1.The overload test is satisfactory if, after each increase by 5 %, 10 % or 15 % in the energy required, the force decreases by less than 3 % for a 5 % increment and remains more than 0,8 Fmax.1.6.2.2.The overload test is satisfactory if, after the structure has absorbed 20 % of the added energy, the force exceeds 0,8 Fmax.1.6.2.3.Additional cracks or tears and/or entry into or lack of protection of the zone of clearance due to elastic deflection are permitted during the overload test. However, after the removal of the load, the structure shall not enter the zone of clearance, which shall be completely protected.1.7.Crushing testIf cracks or tears which cannot be considered as negligible appear during a crushing test, a second, similar crushing, but with a force of 1,2 Fv, shall be applied immediately after the crushing which caused the cracks or tears to appear.2.ZONE OF CLEARANCEThe zone of clearance is identical to that described in Item 2 of Annex III A above, except that the word "impact" is to be replaced by "load" in the last line of Item 2.2.10.3.MEASUREMENTS TO BE MADE3.1.Fractures and cracksAfter each test all structural members, joints and attachment systems shall be visually examined for fractures or cracks, any small cracks in unimportant parts being ignored.3.2.Zone of clearance3.2.1.During each test an examination shall be made to see whether any part of the protection structure has entered the zone of clearance as defined in Item 2 above.3.2.2.In addition, an examination shall be made to determine whether any part of the zone of clearance is outside the protection of the protection structure. For this purpose it shall be considered to be outside the protection of the protection structure if any part of it would have come into contact with flat ground if the tractor had overturned towards the direction from which the impact came. For this purpose the front and rear tyres and track setting shall be assumed to be the smallest specified by the manufacturer.3.3.Elastic deflection (under side loading)The elastic deflection shall be measured 900 mm above the reference point, in the vertical plane in which the load is applied. For this measurement, any apparatus similar to that illustrated in Figure 9 of Annex IV, may be used.3.4.Permanent deflectionAfter the tests, the permanent deflection of the protection structure shall be recorded. For this purpose, before the start of the tests, the position of the main protection structure members in relation to the seat reference point shall be recorded.ANNEX IVFIGURESZone of clearance — ¾ rear perspective viewZone of clearance — Cross-section through the reference plane

Zone of clearance — Side view

Zone of clearance — Rear view

ZONE OF CLEARANCE

Zone of clearance — Top view

Lower part of the zone of clearance — ¾ rear view

Apparatus for determination of seat reference pointMethod of determining seat reference pointPendulum block and its suspending chains or wire ropesImpact at the rearNote:The configuration of the protection structure shown is solely for the purpose of illustration and for dimensional reference. It does not purport to denote design requirements.Impact at the frontNote:The configuration of the protection structure shown is solely for the purpose of illustration and for dimensional reference. It does not purport to denote design requirements.Impact from sideNote:The configuration of the protection structure shown is solely for the purpose of illustration and for dimensional reference. It does not purport to denote design requirements.Crushing testNote:The configuration of the roll-over protection structure shown is solely for the purpose of illustration and for dimensional reference. It does not purport to denote design requirements.Example of apparatus for measuring elastic deflectionForce/Deflection curveOverload test not necessaryForce/Deflection curveOverload test necessaryForce/Deflection curveOverload test to be continuedANNEX VMODELREPORT RELATING TO THE EEC COMPONENT TYPE-APPROVAL TESTS OF A PROTECTION STRUCTURE (REAR-MOUNTED ROLLBAR, FRAME OR CAB) WITH REGARD TO ITS STRENGTH AS WELL AS TO THE STRENGTH OF ITS ATTACHMENT TO THE TRACTORANNEX VIMARKSThe EEC component type-approval mark shall consist of:a rectangle surrounding the lower case letter "e" followed by the distinguishing number of the Member State which has granted the component type-approval:1 for Germany, 2 for France, 3 for Italy, 4 for the Netherlands, 5 for Sweden, 6 for Belgium, 7 for Hungary, 8 for the Czech Republic 9 for Spain, 11 for the United Kingdom, 12 for Austria, 13 for Luxembourg, 17 for Finland, 18 for Denmark, 20 for Poland, 21 for Portugal, 23 for Greece, 24 for Ireland, 26 for Slovenia, 27 for Slovakia, 29 for Estonia, 32 for Latvia, 36 for Lithuania, CY for Cyprus, MT for Malta,34 for Bulgaria, 19 for Romania,25 for Croatia,the EEC component type-approval number which corresponds to the number of the EEC component type-approval certificate issued with regard to the strength of the type of protection structure and its attachment to the tractor placed under and in the vicinity of the rectangle,the letters V or SV, depending on whether a dynamic (V) or static (SV) test was conducted, followed by the number 1, indicating that this is a protection structure within the meaning of this Directive.The protection structure bearing the EEC component type-approval mark shown above is a structure of the rear-mounted rollbar, frame or cab type which has been subjected to a dynamic test, is intended for a narrow-track tractor (V1) and for which EEC component type-approval was granted in France (e2) under the number 431.ANNEX VIIMODEL EEC COMPONENT TYPE-APPROVAL CERTIFICATEANNEX VIIICONDITIONS FOR EEC TYPE-APPROVAL1.The application for EEC type-approval of a tractor with regard to the strength of a protection structure and the strength of its attachment to the tractor shall be submitted by the tractor manufacturer or by his authorized representative.2.A tractor representative of the tractor type to be approved, on which a protection structure and its attachment, duly approved, are mounted, shall be submitted to the technical services responsible for conducting the type-approval tests.3.The technical service responsible for conducting the type-approval tests shall check whether the approved type of protection structure is intended to be mounted on the type of tractor for which the type-approval is requested. In particular, it shall ascertain whether the attachment of the component type-approval was granted.4.The holder of the EEC type-approval may ask for its extension to other types of protection structures.5.The competent authorities shall grant such extension on the following conditions:5.1.The new type of protection structure and its tractor attachment must have received EEC component type-approval.5.2.The new type of protection structure must be designed to be mounted on the type of tractor for which the extension of the EEC type-approval is requested.5.3.The attachment of the protection structure to the tractor must correspond to that which was tested when EEC component type-approval was granted.6.A certificate, of which a model is shown in Annex IX, shall be annexed to the EEC type-approval certificate for each type-approval or type-approval extension which has been granted or refused.7.If the application for EEC type-approval for a type of tractor is introduced at the same time as the request for EEC component type-approval for a type of protection structure intended to be mounted on the type of tractor for which type-approval is requested, the checks laid down in 2 and 3 are not applicable.ANNEX IXMODEL