This International Standard specifies a dynamic test method and the acceptance conditions for roll-over protective structures (cab or frame) of wheeled tractors for agriculture and forestry. It is applicable to tractors having at least two axles for wheels mounted with pneumatic tyres, or having tracks insteads of wheels, with an unballasted tractor mass of not less than 600 kg, but generally less than 6000 kg, and with a minium track width of the rear wheels greater than 1150 mm.