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BS ISO 12003-2:2021

BS ISO 12003-2:2021

$198.66

Tractors for agriculture and forestry. Roll-over protective structures on narrow tractors – Rear-mounted ROPS

Published By Publication Date Number of Pages
BSI 2021 70
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This document specifies procedures for both the static and dynamic strength testing of roll-over protective structures (ROPS) rear-mounted on narrow tractors. It defines the clearance zone and acceptance conditions for rigid or tiltable, rear, two-post roll bar, frame and cab ROPS, and is applicable to tractors so equipped having the following characteristics:

  1. a ground clearance of not more than 600 mm beneath the lowest points of the front- and rear-axle housings (not considering lower points on the axle differential);

  2. a fixed or adjustable minimum track width of one of the two axles of less than 1 150 mm and with the overall width of the other axle being less than that of the first axle, including where the two axles are fitted with rims and tyres of the same size;

  3. a fixed driving position and a mass greater than 400 kg, unballasted, including the ROPS and tyres of the largest size recommended by the manufacturer;

  4. a reversible driving position (reversible seat and steering wheel), with a mass greater than 400 kg, unballasted, including the ROPS and tyres of the largest size recommended by the manufacturer and maximum unballasted mass less than 3 500 kg and maximum permissible mass less than 5 250 kg;

  5. a mass ratio less than 1,75;

  6. a ROPS of the rollbar, frame or cab type, mounted partly or entirely behind the seat index point and having a zone of clearance whose upper limit is (810 + a v) mm above the seat index point in order to provide a sufficiently large area or unobstructed space for the protection of the driver.

This document also specifies optional testing procedures for both seat anchorage points and folding efforts of rear-mounted ROPS designed to fold.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 Foreword
9 Introduction
11 1 Scope
2 Normative references
12 3 Terms and definitions
16 4 Symbols
17 5 Test apparatus and equipment
5.1 Apparatus for both dynamic and static testing
5.1.1 Clearance zone framework
5.1.2 Apparatus for crushing tests
18 5.2 Apparatus for dynamic testing
5.2.1 Device to strike a blow against the protective structure
5.2.2 Pendulum supports
19 5.2.3 Means to lash the tractor to the ground
5.2.4 Wheel beam
5.2.5 Wheel prop
21 5.2.6 Props and lashings for articulated tractors
5.2.7 Tyre pressures and deflection
5.2.8 Device to measure elastic deflection
22 5.3 Apparatus for static testing
25 6 Preparation of tractor and ROPS for testing
26 7 ROPS deflection test procedures
7.1 General requirements
7.2 Test methods
7.3 Test sequence
27 7.4 Dynamic (impact) test procedures for rear-mounted ROPS
7.4.1 Rear impact test procedure
28 7.4.2 Front impact test procedure
7.4.3 Side impact test procedure
30 7.4.4 Additional impact tests
7.5 Static test procedures for rear-mounted ROPS
7.5.1 Test preparation
7.5.2 General requirements for horizontal loading test procedures
31 7.5.3 Rear loading
7.5.4 Front loading
7.5.5 Side loading
32 7.6 Vertical crushing test procedure
7.7 Additional vertical crushing tests
7.8 Observations during testing
7.8.1 Fractures and cracks
7.8.2 Clearance zone
33 7.8.3 Recording permanent deflection
8 Determination of seat index point (SIP), seat location and adjustment for test
8.1 General
8.2 Seat location and adjustment for tests
9 Clearance zone
9.1 General
9.2 Clearance zone for tractors with a non-reversible seat
36 9.3 Clearance zone for tractors with a reversible driving position
37 9.4 Optional seats
38 10 Tolerances
11 Acceptance conditions
11.1 General
11.2 Clearance zone
39 11.3 Seat anchorage performance
11.4 Folding ROPS performance
11.5 After impact loads
11.6 After static horizontal loads
40 11.7 Additional conditions
42 11.8 Cold weather embrittlement
12 Seatbelt anchorage test procedures
13 Folding ROPS
43 14 Labelling
15 Extension to other tractor models
15.1 Administrative extension
15.2 Technical extension
15.2.1 General
44 15.2.2 Extension of the structural test results to other models of tractors
15.2.3 Extension of the structural test results to modified models of the protective structure
15.2.4 Type extension limits
45 15.2.5 Increase of the declared reference mass
16 Test report
46 Annex A (normative) Requirements for providing resistance to brittle fracture of rear-mounted ROPS at a reduced operation temperature
48 Annex B (informative) Folding ROPS test procedures
58 Annex C (normative) Test report for rear-mounted ROPS
68 Bibliography

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BS ISO 12003-2:2021
$198.66