BRITISH STANDARD Agricultural and forestry tractors — Passenger seat — Requirements and test procedures ICS 65.060.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 15694:2009 +A1:2015 BS EN 15694:2009+A1:2015 National foreword This British Standard is the UK implementation of EN 15694:2009+A1:2015 It supersedes BS EN 15694:2009 which is withdrawn The start and finish of text introduced or altered by amendment is indicated in the text by tags Tags indicating changes to CEN text carry the number of the CEN amendment For example, text altered by CEN amendment A1 is indicated by !" The UK participation in its preparation was entrusted to Technical Committee AGE/6, Agricultural tractors and forestry machinery A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application Compliance with a British Standard cannot confer immunity from legal obligations Amendments/corrigenda issued since publication This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2010 © The British Standards Institution 2015 Published by BSI Standards Limited 2015 ISBN 978 580 84330 Date Comments 31 October 2015 Implementation of CEN amendment A1:2015 EUROPEAN STANDARD EN 15694:2015+A1 NORME EUROPÉENNE EUROPÄISCHE NORM November 2015 ICS 65.060.10 Supersedes EN 15694:2009 English Version Agricultural and forestry tractors - Passenger seat Requirements and test procedures Tracteurs agricoles et forestiers - Siège du passager Prescriptions et modes opératoires d'essai Land- und forstwirtschaftliche Traktoren Beifahrersitz - Anforderungen und Prüfverfahren This European Standard was approved by CEN on 20 May 2009 and includes Amendment approved by CEN on 12 September 2015 CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels © 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref No EN 15694:2015+A1:2015 E BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) Contents Page European foreword Introduction Scope Normative references Terms and definitions 4.1 4.2 4.3 4.4 4.5 4.6 Requirements Location and mounting Seat dimensions Seat cushion Seat belt Foot rest and handles Roll-over protection Test procedures Operator's manual Annex A (normative) Standards to be used for testing the roll-over protective structure (see 4.6.1 and 5.1) Annex B (normative) Deflection limiting volume, sequence of tests and acceptance criteria for the passenger seat (see 5.2) 10 B.1 Passenger Deflection Limiting Volume (PDLV) 10 B.2 Passenger seat index point (SIPp) 12 B.3 Allowable interference 12 B.3.1 General 12 B.3.2 Interference evaluation procedure 14 B.3.3 Reversible driver’s position 15 B.4 ROPS test 17 B.4.1 General 17 B.4.2 Sequence of tests 17 B.4.2.1 Longitudinal loading 17 B.4.2.2 First crushing test 17 B.4.2.3 Loading from the side 17 B.4.2.4 Second crushing test 17 B.4.2.5 Second longitudinal loading 17 B.4.3 Horizontal loading tests from the rear, front and side 18 B.4.3.1 General provisions 18 BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) B.4.3.2 Longitudinal loading 18 B.4.3.3 Side loading 18 B.4.4 Crushing tests 19 B.4.4.1 Crushing at the rear 19 B.4.4.2 Crushing at the front 19 B.4.5 Second longitudinal loading test 19 B.4.6 Interference measuring apparatus 20 B.4.7 Conditions for acceptance 21 B.4.7.1 General 21 B.4.7.2 Description of the overload test 22 Annex C (normative) Rules and directions 23 C.1 General 23 C.2 Apparatus 24 C.3 Test conditions 24 C.4 Extension to other tractor models 25 C.4.1 General 25 C.4.2 Extension of the structural test results to other models of tractors 25 C.4.3 Extension of the structural test results to modified models of the protective structure 25 Bibliography 27 BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) European foreword This document (EN 15694:2009+A1:2015) has been prepared by Technical Committee CEN/TC 144 “Tractors and machinery for agriculture and forestry”, the secretariat of which is held by AFNOR This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2016, and conflicting national standards shall be withdrawn at the latest by May 2016 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights This document includes Amendment approved by CEN on 2015-09-12 This document supersedes EN 15694:2009 The start and finish of text introduced or altered by amendment is indicated in the text by tags !" This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) Introduction Agricultural and forestry tractors are often equipped with a passenger seat to allow the safe, short-term and occasional transport of a person from the farm to the field The tractor and cab design is defined by and optimized for various functions and operating conditions The passenger transport is not a main request and less comfortable conditions are accepted by the market for the benefit of the main purposes Roll-over protective structures (ROPS) were introduced to improve the safety of the tractor driver during field operations To allow the protection of the passenger, to consider the specific conditions of tractor design, its intended use and all risks including the risk of roll-over, the standard should satisfy especially the following conditions: — to specify requirements to be applied to all tractors respectively all operations and requirements depending on the intended use respectively operations taking into account the normal use; — to specify performance based requirements corresponding to the state of art and minimizing the necessary changes in tractor design; — to ensure a high level of occupational safety for both – the driver and passenger – during the individual operations; — not to reduce the protection of the driver or passenger against other risks; — to refer to available specifications or standards; — to provide repeatable and reproducible test procedures BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) Scope This standard is applicable to agricultural and forestry tractors on which provision is made for carrying one person in addition to the driver It specifies minimum requirements for space and support, specifies roll-over protective structures (ROPS) test procedures and seat belt requirements, by reference to other standards It also specifies the information to be provided by the tractor manufacturer Normative references The following referenced documents are indispensable for the application of this document For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies ISO 3463, Tractors for agriculture and forestry — Roll-over protective structures (ROPS) — Dynamic test method and acceptance conditions ISO 3776-1, Tractors and machinery for agriculture — Seat belts — Part 1: Anchorage location requirements ISO 3776-2, Tractors and machinery for agriculture — Seat belts — Part 2: Anchorage strength requirements !ISO 5353:1995, Earth-moving machinery, and tractors and machinery for agriculture and forestry — Seat index point" ISO 5700, !Tractors for agriculture and forestry — Roll-over protective structures — Static test method and acceptance conditions" ISO 12003-1, Agricultural and forestry tractors — Roll-over protective structures on narrow-track wheeled tractors — Part 1: Front-mounted ROPS ISO 12003-2, Agricultural and forestry tractors — Roll-over protective structures on narrow-track wheeled tractors — Part 2: Rear-mounted ROPS Terms and definitions For the purposes of this document, the following terms and definitions apply 3.1 passenger seat structure which may or may not be integral with the tractor structure, complete with cushion, intended to seat and transport one adult person ! 3.2 passenger seat index point (SIPp) point located in the central longitudinal plane of the apparatus for determination when installed in the passenger seat BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) 3.3 passenger deflection-limiting volume (PDLV) volume which is defined in relation to the reference planes and the passenger seat index point (SIPp) and serving to set limits and deflections permissible when performing laboratory evaluations of the protective structure 3.4 reference planes vertical planes being longitudinal and transversal to the tractor and passing through the passenger seat index point; these reference planes are assumed to move horizontally with the seat during loading but to remain perpendicular to the tractor or the floor of the roll-over protective structure 3.5 interference zone portion of the operator clearance zone (OCZ) where a defined maximum interference with PDLV is allowed" Requirements 4.1 Location and mounting 4.1.1 Each seat shall be so placed that the passenger is in no danger and creates no impediment to driving the tractor 4.1.2 There shall be a vertical clearance of at least 920 mm above the surface of the passenger seat However, where a tractor satisfies the requirements relating to the driver's protection and seating, but its construction does not allow for such a vertical clearance for the passenger, the clearance may be reduced to 800 mm, provided that adequate padding is provided immediately above the passenger seat at the level of the roof The upper part of the vertical clearance allowed for the passenger may be limited at the rear and sides, only by a radius not exceeding 300 mm The vertical clearance is the vertical open space between the front edge of the seat and the roof of the tractor 4.1.3 The passenger seat shall not add to the overall width of the tractor 4.1.4 Each seat shall be firmly fixed and properly attached according to the type of tractor, to a structural member of the tractor chassis, roll-over protective structure, platform, etc The structural member concerned shall be sufficiently strong to support a laden passenger seat 4.2 Seat dimensions 4.2.1 Each seat shall be at least 400 mm wide and at least 300 mm deep 4.2.2 Each seat shall incorporate a lateral support for position-maintenance purposes and be fitted with a back rest that is at least 200 mm high NOTE The lateral support and/or the backrest may also be provided by parts of the cab and/or the roll-over protective structure 4.3 Seat cushion The seat cushion shall be either padded or made from elastic materials (e.g plastics) BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) 4.4 Seat belt A restraint system shall be provided The restraint system shall be in accordance with the ISO 3776- series or other applicable standards 4.5 Foot rest and handles 4.5.1 A suitable foot rest for the passenger's feet shall be provided 4.5.2 Suitable grab handles shall be provided in order to facilitate the access to the passenger seat and to help him to remain in position on it 4.6 Roll-over protection 4.6.1 If the intended use of the passenger seat allows the transport of passengers during field operations, the passenger shall be protected by the roll-over protective structure provided for the driver's protection or by an additional structure 4.6.2 If the intended use of the passenger seat only allows the transport of passengers on public roads and not during field operations, a safety sign with the information that the passenger seat shall not be used during field operations shall be provided on or near to the passenger seat In addition, this information shall be provided in the operator's manual 4.6.3 To allow the same specifications for road and field operations in the future, specific test procedure(s) and acceptance criteria are needed (see 5.2) Test procedures 5.1 The roll-over protective structure provided for the protection of the driver and/or the additional structure, if provided (see 4.6.1), shall be tested in accordance with Annex A 5.2 Annex B includes the outline for a specific provisional test procedure and acceptance criteria (see 4.6.3) !deleted text" 5.3 The requirements and dimensions specified in 4.1 to 4.5 shall be verified by inspection and/or measurement Operator's manual The operator's manual shall provide the following information: a) the intended use of the passenger seat; b) the obligation for the passenger to use the seat belt; c) that it is forbidden to use the passenger seat during field operations, if this use is excluded from the intended use BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) Key A h α horizontal distance between SIPp and SIPo measured on a vertical plane orthogonal to the longitudinal median plane of the tractor passing through SIPp vertical distance between SIPp and SIPo measured on a vertical plane orthogonal to the longitudinal median plane of the tractor passing through SIPp angular deflection measured between vertical median plane of the tractor and vertical median plane of PDLV Figure B.6 — Nomenclature for interference determination - Rear view (on the left) and top view (on the right) B.3.2 Interference evaluation procedure The interference evaluation procedure is defined as follows: — determination of the operator seat index point (SIPo); — determination of the passenger seat index point (SIPp); — determination of the three interference zones on the operator clearance zone (see Figure B.5); — determination of the reference interference zone by the projection of the SIPp on the longitudinal median plane of tractor; — determination of the angular deflection (α) of the passenger seat with respect to the moving direction of the tractor; — measurement of the vertical distance (h) between SIPo and SIPp; — measurement of the transversal distance (A) between SIPo and SIPp during all the ROPS test; — comparison and verification of the value of A, determined at previous step, with respect to the values reported in the following Tables B.1, B.2 and B.3 14 BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) Table B.1 —Minimum distance (A) for the zone I A [mm] h [mm] 0° ≤ α ≤ 10° 10° < α ≤ 20° -200 ≤ h < -150 ≥ 645 ≥ 670 -100 ≤ h < -50 ≥ 610 ≥ 630 -150 ≤ h < -100 -50 ≤ h < 0 ≤ h ≤ +100 ≥ 620 ≥ 600 ≥ 570 ≥ 650 ≥ 620 ≥ 600 Table B.2 —Minimum distance (A) for the zone II A [mm] h [mm] 0° ≤ α ≤ 10° 10° < α ≤ 20° plane a plane b plane a plane b -200 ≤ h < -150 ≥ 645 ≥ 420 ≥ 670 ≥ 460 -100 ≤ h < -50 ≥ 610 ≥ 370 ≥ 630 ≥ 415 -150 ≤ h < -100 -50 ≤ h < 0 ≤ h ≤ +100 ≥ 620 ≥ 600 ≥ 570 ≥ 390 ≥ 345 ≥ 320 ≥ 650 ≥ 620 ≥ 600 ≥ 430 ≥ 390 ≥ 340 Table B.3 —Minimum distance (A) for the zone III h [mm] A [mm] 0° ≤ α ≤ 10° 10° < α ≤ 20° -200 ≤ h < -150 ≥ 420 ≥ 460 -100 ≤ h < -50 ≥ 370 ≥ 415 -150 ≤ h < -100 -50 ≤ h < 0 ≤ h ≤ +100 ≥ 390 ≥ 345 ≥ 320 ≥ 430 ≥ 390 ≥ 340 A tolerance of % should be applied to all dimensions reported in Tables B.1, B.2 and B.3 Reference interference zone, angular deflection (α) and vertical distance (h) measured at the beginning shall be considered constant during any part of the tests B.3.3 Reversible driver’s position For tractors with a reversible driver’s position (reversible seat and steering wheel), it is necessary to repeat the interference evaluation procedure also for rearward facing seat position, as described in B.3.2 for forward facing seat position 15 BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) Operator clearance zone for rearward (R) facing seat position Operator clearance zone for forward (F) facing seat position Figure B.7 — Interference zone in case of reversible driver's position (left side view) In fact, the OCZ for reward facing seat position will have different interference zones, vertical distance (h) and transversal distance (A) with respect to OCZ for forward facing seat position (see Figure B.7), while the angular deflection (α) will be the same for both seat configurations because it is defined by the passenger seat and the tractor longitudinal median plane Applying the interference evaluation procedure to both driver seat positions, the four cases reported in Table B.4 may present Table B.4 — Possible cases of combined interference evaluation procedure for reversible driver's position CASE In particular, referring to: Forward facing OCZ test Allowable interference Not allowable interference Rearward facing OCZ test Allowable interference Not allowable interference Allowable interference Not allowable interference — Case 1: the PDLV has an allowable interference for both operator seat positions and can be used in both working condition without any restriction — Case 2: the passenger seat can be used only when the operator seat is in forward facing position When operator seat is in rearward position passenger seat usage shall be avoided or tractor rearward functionality shall be limited 16 BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) — Case 3: the passenger seat can be used only when the operator seat is in rearward facing position When operator seat is in forward position passenger seat usage shall be avoided or tractor forward functionality shall be limited — Case 4: the PDLV has not allowable interference and then passenger seat shall not be installed B.4 ROPS test B.4.1 General The sequence of tests should be derived from the OECD code and modified according to the position of the passenger seat, if necessary All the rules and directions defined in Annex C shall be applied, while the sequence of tests, the load points of application and the conditions for acceptance with reference to passenger seat are herein reported B.4.2 Sequence of tests Tests shall be conducted in the following sequence: B.4.2.1 Longitudinal loading For a wheeled tractor with at least 50 % of its mass on the rear axle and for track laying tractors, the longitudinal loading shall be applied from the rear For other tractors the longitudinal loading shall be applied from the front B.4.2.2 First crushing test The first crushing test shall be applied at the same end of the protective structure as the longitudinal loading B.4.2.3 Loading from the side The side loading shall be on the side most likely to lead to infringement of the passenger deflection limiting volume B.4.2.4 Second crushing test The second crushing test shall be applied at the end of the protective structure opposite from that receiving the first longitudinal loading In the case of two-post designs, the second crush may be at the same point as the first crush B.4.2.5 Second longitudinal loading A second longitudinal loading shall be applied to tractors fitted with a folding (e.g two posts) or tiltable (e.g non-two posts) protective structure, if one or more of the following conditions exists: — temporary folding for special operating conditions; — structures designed to tilt for service, unless the tilt mechanism is independent from the structural integrity of the roll-over protective structure For folding protective structures, if the first longitudinal loading was applied in the folding direction then a second longitudinal loading is not required 17 BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) B.4.3 Horizontal loading tests from the rear, front and side B.4.3.1 General provisions The load applied to the protective structure shall be distributed uniformly by means of a stiff beam, normal to the direction of load application The stiff beam may be equipped with a means of preventing its sideways displacement The rate of load application shall be such that it can be considered static As the load is applied, force and deflection shall be recorded as a continuous record to ensure accuracy Once the initial application has commenced, the load shall not be reduced until the test has been completed The direction of the applied force shall be within the following limits: — at start of test (no load): ± 2°; — during test (under load): 10° above and 20° below the horizontal The rate of load application shall be considered static if the rate of deflection under loading is not greater than mm/s If no structural cross member exists at the point of load application, a substitute test beam which does not add strength will be utilised B.4.3.2 Longitudinal loading The load shall be applied horizontally and parallel to the median plane of the tractor If the load is applied from the rear, the longitudinal load and the lateral load shall be applied on different sides of the median plane of the tractor If the longitudinal load is applied from the front, it shall be on the same side as the side load The load shall be applied to the uppermost transverse structural member of the protective structure (i.e that part which would be likely to strike the ground first in an overturn) The point of application of the load shall be located at one sixth of the width of the top of the protective structure inwards from the outside corner The width of the protective structure shall be taken as the distance between two lines parallel to the median plane of the tractor touching the outside extremities of the protective structure in the horizontal plane touching the top of the uppermost transverse structural members The length of the load distribution device shall be not less than one third of the width of the protective structure and not more than 49 mm greater than this minimum The longitudinal loading shall be stopped when: — the energy absorbed by the protective structure is equal to or greater than the required energy input, EIL1 where: EIL1 = 1,4 M — the protective structure infringes on the passenger deflection limiting volume or leaves it unprotected B.4.3.3 Side loading The side loading shall be applied horizontally at 90° to the median plane of the tractor It shall be applied to the upper extremity of the protective structure at a point (160 - ah) mm forward of the operator seat index point 18 BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) For tractors with a reversible driver’s position (reversible seat and steering wheel), it shall be applied to the upper extremity of the protective structure at the mid-point between the two operator seat index points If it is certain that any particular part of the protective structure will touch ground first when the tractor overturns sideways, the loading shall be applied at that point, provided that this permits uniform distribution of the load In the case of a two-post protective structure, side loading shall be applied at the structural member uppermost on the side, regardless of the operator seat index position The load distribution beam shall be as long as practicable subject to a maximum of 700 mm The side loading shall be stopped when: — the energy absorbed by the protective structure is equal to or greater than the required energy, EIS , where: EIS = 1,75 M — the protective structure infringes on the passenger deflection limiting volume or leaves it unprotected B.4.4 Crushing tests B.4.4.1 Crushing at the rear The crushing beam shall be positioned across the rear uppermost structural members so that the resultant of the crushing forces is located in the vertical reference plane The crushing force F = 20 M shall then be applied This force shall be maintained for s after 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 that would support the tractor when completely overturned The crushing force F = 20 M shall then be applied B.4.4.2 Crushing at the front The crushing beam shall be positioned across the front uppermost structural members so that the resultant of the crushing forces is located in the vertical reference plane The crushing force F = 20 M shall then be applied This force shall be maintained for s after cessation of any visually detectable movement of the protective structure Where the front part of the roof of the protective structure 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 that would support the tractor when completely overturned The crushing force F = 20 M shall then be applied B.4.5 Second longitudinal loading test The load shall be applied in the opposite direction to and at the corner farthest from the point of application of the first longitudinal load 19 BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) The longitudinal loading shall be stopped when: — the energy absorbed by the protective structure is equal to or greater than the required energy, EIL2, where: EIL2 = 0,35 M — the protective structure infringes on the passenger deflection limiting volume or leaves it unprotected B.4.6 Interference measuring apparatus A device for measuring distance A during and after completion of the tests is needed in order to record the minimum value attained For this measurement, an apparatus similar to that illustrated in Figure B.8 may be used Key friction collar under load configuration A1 A2 20 contact plates starting configuration initial distance minimum distance attained Figure B.8 — Example of interference measuring mechanical apparatus BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) B.4.7 Conditions for acceptance B.4.7.1 General For the protective structure to be accepted it shall fulfil the following conditions at the beginning, during and after completion of the tests: — no part shall enter the passenger deflection limiting volume during any part of the tests No part may strike the passenger seat during the tests The following components/elements may not be considered unless such parts are relevant for the strength of the ROPS: — internal trim; — glazing; — door handles (rails, grips); — passenger seat (including backrest); — controls; — the passenger deflection limiting volume 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 tyres and track width setting shall be the smallest standard fitting specified by the manufacturer; — the minimum value of distance A attained during or after completion of the tests shall comply with Tables B.1, B.2 or B.3; — for the articulated tractors, the median planes of the two parts shall be assumed to be in line; — after 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 protective structure members in relation to the operator seat index point shall be recorded Then any displacement of the members resulting from the loading tests and any change of the height of the front and back members of the roof of the protective structure shall be recorded; — at the point where the required energy absorption is met in each of the specified horizontal loading tests the force shall exceed 0,8 Fmax; — an overload test shall be required if the applied force decreases by more than % over the last % of the deflection attained when the energy required is absorbed by the structure See B.4.7.2 for the description of the overload test; — the required force shall be sustained in both crushing tests; — there shall be no protruding member or component which would be likely to cause serious injury during an overturning accident or which, through the deformation occurring, might trap the passenger, for example by the leg or foot; — there shall be no other components presenting a serious hazard to the passenger 21 BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) B.4.7.2 Description of the overload test — An overload test shall consist of continuing the horizontal loading in increments of % of the original required energy, up to a maximum of 20 % additional energy — The overload test shall be successfully completed if after the absorption of 5, 10 or 15 % additional energy the force drops by less than % for each % increment whilst remaining greater than 0,8 Fmax or if, after the absorption of 20 % additional energy the force is greater than 0,8 Fmax — Additional cracks or tears or entry into or lack of protection of the passenger deflection limiting volume, due to elastic deformation, are permitted during the overload test After removing the load, however, the protective structure shall not infringe on the passenger deflection limiting volume, which shall be completely protected 22 BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) Annex C (normative) Rules and directions C.1 General NOTE The text herein reported refers to sections from 3.1 to 3.3 of OECD Code edition July 2014 and includes additional statements for the passenger seat The protective structure may be manufactured either by the tractor manufacturer or by an independent firm In either case a test is only valid for the model of tractor on which it is carried out The protective structure shall be retested for each model of tractor to which it is to be fitted However, testing stations may certify that the strength tests are also valid for tractor models derived from the original model by modifications to the engine, transmission and steering and front suspension (see C.4 Extension to other tractor models) On the other hand, more than one protective structure may be tested for any one model of tractor The protective structure submitted for static test shall be supplied attached in the normal manner to the tractor or tractor chassis on which it is used The tractor chassis shall be complete including attaching brackets and other parts of the tractor that may be affected by loads imposed on the protective structure Where a "tandem" tractor is concerned, the mass of the standard version of that part to which the protective structure is fitted is to be used A protective structure may be designed solely to protect the driver in the event of the tractor overturning Onto the protective structure it may be possible to fit weather protection, of a more or less temporary nature The driver will usually remove this in warm weather There are protective structures however, in which the cladding is permanent and warm weather ventilation provided by windows or flaps As the cladding may add to the strength of the structure and if removable may well be absent when an accident occurs, all parts that can be so taken away by the driver will be removed for the purpose of the test Doors, roof hatch and windows that can be opened shall be either removed or fixed in the open position for the test, so that they not add to the strength of the protective structure It shall be noted whether, in this position, they would create a hazard for the passenger in the event of overturning Throughout the remainder of these rules, reference will only be made to testing the protective structure It shall be understood that this includes cladding not of a temporary nature A description of any temporary cladding supplied is to be included in the specifications All glass or similar brittle material shall be removed prior to the test Tractor and protective structure components which might sustain needless damage during the test and which not affect the strength of the protective structure or its dimensions may be removed prior to the test if the manufacturer wishes In addition parts mentioned in B.4.7.1 may also be removed at the request of the manufacturer, unless such parts are relevant for the strength of the ROPS No repairs or adjustment may be carried out during the test Any component of the tractor contributing to the strength of the protective structure such as mudguards, which has been reinforced by the manufacturer, should be described and its measurements given in the test report 23 BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) C.2 Apparatus The following shall be used in horizontal loading tests: — material, equipment and means of attachment to ensure that the tractor chassis is firmly fixed to the ground and supported independently of the tyres; — device for applying a horizontal force to the protective structure; provision shall be made so that the load can be uniformly distributed normal to the direction of loading: — a beam of length not less than 250 mm nor more than 700 mm in exact multiples of 50 mm between these lengths shall be used The beam shall have a vertical 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; — universal joints or the equivalent shall be incorporated to ensure that the loading device does not constrain the protective structure in rotation or translation in any direction other than the direction of loading; — where the straight line defined by the appropriate beam on the protective structure is not normal to the direction of application of load the space shall be packed so as to distribute the load over the full length; — equipment for measuring force and deflection in the load direction, relative to the tractor chassis To ensure accuracy, measurements shall be taken as continuous readings The measuring devices shall be located so as to record the force and deflection at the point of, and along the line of, loading The following shall be used in crushing tests: — material, equipment and means of attachment to ensure that the tractor chassis is firmly fixed to the ground and supported independently of the tyres; — device for applying a downward force to the protective structure, including a stiff beam with a width of 250 mm; — equipment for measuring the total vertical force applied C.3 Test conditions The protective structure shall be to production specifications and shall be fitted to the appropriate tractor model chassis in accordance with the manufacturer's declared method of attachment The assembly shall be secured to the bedplate so that the members connecting the assembly and the bedplate not deflect significantly in relation to the protective structure under load The assembly shall not receive any support under load other than that due to the initial attachment An adjustable track width setting for the wheels, if present, shall be chosen such that no interference exists with the protective structure during the tests The protective structure shall be instrumented with the necessary equipment to obtain the required force-deflection data All tests shall be performed on the same protective structure No repairs or straightening of any members shall be carried out between any parts of the test 24 BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) On completion of all tests, permanent deflections of the protective structure shall be measured and recorded C.4 Extension to other tractor models C.4.1 General If there are changes in the make, denomination or marketing features of the tractor or protective structure tested or listed in the original test report, the testing station that has carried out the original test can issue an “administrative extension report” This extension report shall contain a reference to the original test report When 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 cases described in C.4.2 and C.4.3 C.4.2 Extension of the structural test results to other models of tractors The loading and crushing tests need not be carried out on each model of tractor, provided that the protective structure and tractor comply with the following conditions: — the structure shall be identical to the one tested; — the required energy shall not exceed the energy calculated for the original test by more than % The % limit shall also apply to extensions in the case of substituting tracks for wheels on the same tractor; — the method of attachment and the tractor components to which the attachment is made shall be identical; — any components such as mudguards and bonnet that may provide support for the protective structure shall be identical; — the position and critical dimensions of the passenger seat in the protective structure, the position of SIPp with respect to SIPo and the relative position of the protective structure on the tractor shall be such that the PDLV would have remained within the protection of the deflected structure throughout all tests taking into account the minimum horizontal distance (A) C.4.3 Extension of the structural test results to modified models of the protective structure This procedure has to be followed when the provisions of paragraph C.4.2 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): — modifications 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 SIPo location in the protective structure (subject to checking that the minimum horizontal distance (A) with respect to the new SIPo location remains within the limits of Table B.1, B.2 or B.3); — modifications 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: 25 BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) — no more than extensions may be accepted without a validation test; — the results of the validation test will be accepted for extension if all the acceptance conditions are fulfilled and 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 ± % and the deflection measured 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 report by more than ± %; — more 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; — increase 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 ± % specified in previous item are not applicable in such a case)." 26 BS EN 15694:2009+A1:2015 EN 15694:2009+A1:2015 (E) Bibliography [1] [2] Council Directive 77/536/EEC of 28 June 1977 on the approximation of the laws of the Member States relating to the roll-over protection structures of wheeled agricultural or forestry tractors Council Directive 79/622/EEC of 25 June 1979 on the approximation of the laws of the Member States relating to the roll-over protection structures of wheeled agricultural or forestry tractors (static testing) [3] Council Directive 87/402/EEC of 25 June 1987 on roll- over protection structures mounted in front of the driver's seat on narrow-track wheeled agricultural and forestry tractors [5] !OECD Code 4, July 2014 OECD standard code for the official testing of protective structures on agricultural and forestry tractors (static test)" [4] Council Directive 86/298/EEC of 26 May 1986 on rear- mounted roll-over protection structures of narrow-track wheeled agricultural and forestry tractors 27 British Standards Institution (BSI) BSI is the independent national body responsible for preparing British Standards and other standards-related publications, information and services It presents the UK view on 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