jerky or Examples of sudden force include: Sudden force Figure 5 – unexpected impact recoil of a large nail gun movements while handling an item or throwing or catching objects load are particularly cutting reinforcement steel with hazardous because the large bolt cutters body must suddenly adapt to the changing carrying an unbalanced or unstable force. load such as bagged stock feed pellets that suddenly moves (Figure Tasks where force is 5) applied suddenly and with speed also handling frightened or resistant generates high force. animals handling patients who suddenly resist or no longer assist during the handling procedure. Movement Examples of repetitive movement Repetitive movement Figure 6 – using the same parts of include: the body to repeat similar painting movements over a period of time. lifting goods from a conveyor belt and packing them in a carton typing and other keyboard tasks(Figure 6) repeatedly reaching for and assembling components in electronics manufacturing using a socket and ratchet or spanner to unscrew long bolts. Posture An ideal posture is one where the trunk and head are upright and forward facing, the arms are by the side of the body, the forearms are either hanging straight or at right angles to the upper arm, and the hand is in the handshake position. Postures that are both awkward and sustained are particularly hazardous.
Sudden force – jerky or unexpected movements while handling an item or load are particularly hazardous because the body must suddenly adapt to the changing force. Tasks where force is applied suddenly and with speed also generates high force. Examples of sudden force include: impact recoil of a large nail gun throwing or catching objects cutting reinforcement steel with large bolt cutters carrying an unbalanced or unstable load such as bagged stock feed pellets that suddenly moves (Figure 5) handling frightened or resistant animals handling patients who suddenly resist or no longer assist during the handling procedure. Figure 5 Movement Repetitive movement – using the same parts of the body to repeat similar movements over a period of time. Examples of repetitive movement include: painting lifting goods from a conveyor belt and packing them in a carton typing and other keyboard tasks(Figure 6) repeatedly reaching for and assembling components in electronics manufacturing using a socket and ratchet or spanner to unscrew long bolts. Figure 6 Posture An ideal posture is one where the trunk and head are upright and forward facing, the arms are by the side of the body, the forearms are either hanging straight or at right angles to the upper arm, and the hand is in the handshake position. Postures that are both awkward and sustained are particularly hazardous.
Hazardous-Manual-Tasks.docx