ISO 4254-10:2009, to be used together with ISO 4254-1, specifies the safety requirements and their verification for the design and construction of rotary tedders, rotary rakes and rotary tedder–rakes, including rotary drum rakes, used by one person (the operator) only, having one or several powered rotors, mounted, semi-mounted, trailed or self-propelled. In addition, it specifies the type of information on safe working practices, including residual risks, to be provided by the manufacturer.

ISO 4254-10:2009 is not applicable to: machines with ground­‑driven tines or ground‑wheel–driven tines (e.g. sunflower rakes); parallel bar rakes; chain or endless belt type rakes; pedestrian‑controlled tedders and rakes; machines equipped with a pick-up device.

ISO 4254-10:2009, taken together with ISO 4254-1, deals with all the significant hazards, hazardous situations and events relevant to rotary tedders, rotary rakes and rotary tedder­–rakes when they are used as intended and under the conditions foreseen by the manufacturer, excepting the hazards arising from: the environment, other than noise; electromagnetic compatibility; vibration; overturning in regard to the protection of the operator at the driving station of a self-propelled machine; moving parts for power transmission except strength requirements for guards and barriers; safety and reliability of control systems.