ISO-6055-2004.pdf

INTERNATIONAL STANDARD ISO 6055 Third edition 2004-09-01 Reference number ISO 6055:2004(E) © ISO 2004 Industrial trucks Overhead guards Specification and testing Chariots de manutention Protège-conducteurs Spécifications et essais -,-,- ISO 6055:2004(E) ii© ISO 2004 All rights reserved PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. 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ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ISO 6055:2004(E) © ISO 2004 All rights reserved iii Contents Page 1Scope 1 2Normative references 1 3Requirements for high lift rider trucks with lift height exceeding 1 800 mm . 1 3.1Introduction . 1 3.2General . 1 3.3Dimensions 2 3.4Testing 6 3.4.1General 6 3.4.2Dynamic test . 6 3.4.3Impact drop test . 6 3.4.4Operators' legs and feet protection test . 7 3.5Performance requirements . 7 4Requirements for variable reach trucks with operator position not protected by the boom . 9 4.1Introduction . 9 4.2General . 9 4.3Dimensions 9 4.4Testing 10 4.4.1General 10 4.4.2Falling objects test . 10 4.4.3Overturning test . 10 4.5Performance requirements . 10 Bibliography . 11 ISO 6055:2004(E) iv© ISO 2004 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 6055 was prepared by Technical Committee ISO/TC 110, Industrial trucks, Subcommittee SC 2, Safety of powered industrial trucks. This third edition cancels and replaces the second edition (ISO 6055:1997), it includes the contents of ISO 6055:1997 with the exception of the option for order picking trucks. The following requirements have been added: impact drop testing; capability to add a fitting to protect against small falling objects; requirements for variable reach rough terrain trucks. INTERNATIONAL STANDARDISO 6055:2004(E) © ISO 2004 All rights reserved 1 Industrial trucks Overhead guards Specification and testing 1Scope This International Standard specifies the requirements and testing of overhead guards, operators' legs and feet protection, roll-over protection system (ROPS) and falling-object protection system (FOPS) for any type of high lift, rider operated, powered industrial truck with a lift height exceeding . 2Normative 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 3164, Earth-moving machinery Laboratory evaluations of protective structures Specifications for deflection-limiting volume ISO 3449, Earth-moving machinery Falling-object protective structures Laboratory tests and performance requirements ISO 3471, Earth-moving machinery Roll-over protective structures Laboratory tests and performance requirements ISO 3691, Powered industrial trucks Safety code ISO 5353, Earth-moving machinery, and tractors and machinery for agriculture and forestry Seat index point ISO 13564-1, Powered industrial trucks Test methods for verification of visibility Part 1: Sit-on and stand- on operator trucks and variable reach trucks 3Requirements for high lift rider trucks with lift height exceeding 1 800 mm 3.1Introduction This section applies to trucks fitted with masts and variable reach trucks where the operator position is protected by the boom, i.e. the mast or boom prevents the truck from tipping more than a nominal . 3.2General 3.2.1The overhead guard shall extend over the operator when in the normal operating position(s) as defined in ISO 3691 and when the operator is operating the controls as provided by the truck manufacturer. For overhead guards fixed to the mast, this also applies when the mast is inclined. The control levers in their neutral position, the pedals in their released condition and the steering wheel are considered protected if they do not project in the direction of the mast more than beyond the vertical projection of the outline of the overhead guard onto a horizontal plane; see Figure 1. Adjustable steering wheels for the driving mode shall be placed in the centre position. No account is taken of the parking brake lever in its foremost position in relation to the mast. 1 800 mm 90 150 mm -,-,- ISO 6055:2004(E) 2© ISO 2004 All rights reserved Any part of the operator's legs or feet, in the normal operating position, that project more than beyond the front of the overhead guard when vertically projected onto a horizontal plane, shall be protected by a structure. The test procedure for the structure is described in 3.4.4. 3.2.2Failure of the tilting mechanism must not, directly or indirectly, cause the operator to be in danger because of the overhead guard. 3.3Dimensions 3.3.1The guard shall be constructed in a manner that does not interfere with the visibility, as specified in ISO 13564-1. 3.3.2Openings in the top of the overhead guard shall not exceed in one of the two dimensions, i.e. width or length. 3.3.3For high-lift trucks on which the operator is seated, the vertical clearance, from the seat index point in accordance with ISO 5353 to the underside of the section of the overhead guard under which the operator's head is located when the operator is in the normal operating position, shall not be less than . Dimensions in millimetres Key 1edge of overhead guard 2phantom view of front support 3rear of forward structure Figure 1 Satisfactory protection by the overhead guard 150 mm 150 mm 903 mm -,-,- ISO 6055:2004(E) © ISO 2004 All rights reserved 3 3.3.4For high-lift trucks on which the operator stands, the vertical clearance, from the platform where the operator stands to the underside of the section of the overhead guard under which the operator's head is located when the operator is in the normal operating position, shall not be less than . 3.3.5When requested by the user, the manufacturer may reduce the normal overall overhead guard height and vertical clearance for the operator's head under the overhead guard to permit operation of the truck with an overhead guard in areas where the overhead clearance limits the overall height of the truck. For example, if the torso height of the 95th percentile is XX as defined in Figures 1 to 4 of ISO 3411:19951 and the overhead guard height is reduced by Y, then the recommended torso height for operators should not exceed XX-Y. Where there is reduced vertical clearance, information shall be provided with the overhead guard specifying any limits associated with the height of operators who may use trucks on which the guard is fitted. 3.3.6Where the manufacturer of the overhead guard has been informed that the user may be at risk from falling objects which could pass through the opening (see 3.3.2), then the guard shall be constructed to remove that risk, with the opening set as necessary based upon the information supplied. Dimensions in millimetres Key 1centre of the operator's standing position or seat index point with the seat at its midpoint of adjustment 2deformation limiting line () 3measuring area of deformation 4deformed underside Figure 2 Dynamic test permissible deformation Overhead guard supported on all sides 1 880 mm 150 mm L 20 mm max. ISO 6055:2004(E) 4© ISO 2004 All rights reserved Dimensions in millimetres Key 1centre of the operator's standing position or seat index point with the seat at its midpoint of adjustment 2deformation limiting line () 3measuring area of deformation 4deformed underside 5base line relative to chassis Figure 3 Dynamic test permissible deformation Overhead guard supported on one side only L 20 mm max. ISO 6055:2004(E) © ISO 2004 All rights reserved 5 Dimensions in millimetres Key 1centreline of truck and test load 2drop height; see Table 1 3test load Figure 4 Impact test method -,-,- ISO 6055:2004(E) 6© ISO 2004 All rights reserved 3.4Testing 3.4.1General 3.4.1.1A dynamic and an impact drop test shall be carried out on a guard fitted to a truck of the type and rated capacity for which it has been designed. Alternatively, the guard may be mounted on a test chassis provided that the mounting is the same as that on the truck for which it was designed. 3.4.1.2The same overhead guard and mounting shall be used for both tests. The dynamic test, as described in 3.4.2, shall be conducted first, followed by the impact drop test, as described in 3.4.3. 3.4.1.3In the case of specially designed overhead guards fitted to trucks, other means, such as calculation methods that have been verified through tests on comparable guards, may be used to determine compliance with the requirements. 3.4.1.4For trucks with an elevating operator position and an auxiliary lifting equipment with a lift height up to and including in relation to the operator platform, the impact test is not required. 3.4.2Dynamic test 3.4.2.1The purpose of this test is to determine the resistance to permanent deflection of the portion of the overhead guard under which the operator sits or stands. NOTEIn the case of overhead guards fitted to trucks of special design, other means, such as computation or prior test results, may be used to determine compliance with the requirements. 3.4.2.2The test object shall be a mass of having a square striking face with a side dimension of . The striking face shall be of oak wood or material of a similar density and at least thick. The corners and edges shall have a radius of . 3.4.2.3The test object shall be positioned to drop in free fall with the striking face approximately parallel to the top of the overhead guard, so as not to strike with a corner or an edge. The test object shall be dropped a distance of 10 times. The first drop shall be from a point with the centre of the test object vertically above the seat index point of the operator's seat in accordance with ISO 5353, with the seat in its mid-point of adjustment, or above the centre of the standing position. The other 9 drops shall be in a clockwise direction from points with the centre of the test object equally spaced on a diameter circle, the centre point of which is vertically above the seat index point of the operator's seat, in its mid point of adjustment, or above the centre of the standing position. The first of the nine drops to be from a point at the front of the overhead guard. NOTEIt is recognized that in some positions a portion of the test object may overlap the edge of the overhead guard when striking. 3.4.3Impact drop test 3.4.3.1The purpose of this test is to determine the permanent deformation of the overhead guard if struck by a large load, e.g. packaged timber, paper reels. 3.4.3.2The test load shall be composed of nominal construction grade timber boards, long; the complete test load shall not exceed in width. The shall be placed with the nominal dimension of the cross section horizontal. The timber shall be bound together with at least three metal bands, one approximately in the centre and the others not further than from each end. The test load shall have a minimum mass as specified in Table 1. A test load of different dimensions and/or materials may be used, provided it results in a test not less severe than that described above. 1 800 mm 45 kg300 mm 50 mm 10 +5 0 mm 1,5 m 600 mm 50 mm×100 mm 3 600 mm1 000 mm50 mm×100 mm 100 mm 900 mm ISO 6055:2004(E) © ISO 2004 All rights reserved 7 3.4.3.3The test load shall be centred above the overhead guard with the length at right angles to the longitudinal centre line of the truck, the flat shall strike the guard in this position (see Figure 4). 3.4.3.4The test load shall be dropped in free fall from an approximately horizontal position and from a height to develop the required impact, in joules, specified in Table 1. 3.4.4Operators' legs and feet protection test 3.4.4.1The purpose of this test is to verify the strength of the structure providing protection to the operator's feet and legs. See 3.2.1. 3.4.4.2The test object, as specified in 3.4.2.2, shall be positioned above the centre of each set of pedals and dropped in free fall from a height of to strike the protection structure. The test object shall be dropped once above each set of pedals. To provide a clear drop for the purposes of this test, any adjacent components, e.g. overhead guard, mast, steering column, or components mounted on the protection structure, e.g. hydraulic control lev