AS ISO 3471:2020 Earth-moving machinery – Roll-over protective structures一Laboratory tests and performance requirements.
AS ISO 3471 specifies performance requirements for metallic roll-over protective structures (ROPS) for earth-moving machinery, as well as a consistent and reproducible means of evaluating the compliance with these requirements by laboratory testing using static loading on a representative specimen.
NOTE 1 The structure can also provide FOPS (falling-object protective structure) protection.
This International Standard is applicable to ROPS intended for the following mobile machines with seated operator as defined in ISO 6165 and with a mass greater than or equal to 700 kg:
— dozer;
— loader;
— backhoe loader;
— dumper;
— pipelayer;
— tractor section (prime mover) of a combination machine (e.g. tractor scraper, articulated frame dumper);
— grader;
— landfill compactor;
— roller;
— trencher.
This International Standard is not applicable to training seats or additional seats for operation of an attachment.
NOTE 2 It is expected that reasonable crush protection for a seat-belted operator will be provided under at least the conditions of an initial forward velocity of 0 km/h to 16 km/h on a hard clay surface of 300 maximum slope in the direction of roll, and 360° of roll about the longitudinal axis of the machine without loss of contact with the slope.
NOTE 3 This International Standard can be used to provide guidance to the manufacturers of roll-over protective structures should it be decided to provide such protection for these or other machines for a particular application.
2 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 148-1:2006, Metallic materials — Charpy pendulum irn pact test (V-notch) — Part 1: Test method
ISO 898-1:1999, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts, screws and studs
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
substantially rigid part of the test fixture to which the machine frame is attached to conduct the test
boundary plane
plane defined as the vertical projected plane of the back, side, or knee area of the DLV
Note 1 to entry: The boundary planes are used to determine the load application point.
deflection-limiting volume
orthogonal approximation of a large, seated, male operator wearing normal clothing and a protective helmet
Note 1 to entry: Adapted from ISO 3 164:1995.AS ISO 3471 pdf download.