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Example: A worker lifts a 13 kg load from loosely piled pieces of metal from the floor to the table five times an hour.
To calculate the recommended weight limit (RWL) for the task:
Weight - 13 kg
H (Horizontal Distance) - 30 cm
V (Vertical Distance) - 0 cm
D (Lifting/ carrying Distance) - 115 cm
F (Frequency) - 12 min
A (Angle) - 0°
C (Coupling/quality of grip) - poor
23 Kg x 0.83 x 0.78 x 0.85 x 1.00 x 1.00 x 0.90 = 11.439 kg
Therefore the TASK IS DANGEROUS.
The components: V - starting height, D - lifting distance and H - horizontal distance and C - poor grasp contribute similarly to the risk.
23 kg x 0.83 x 0.93 x 0.93 x 1.00 x 1.00 x 0.90 = 14.86 kg
The weight of the load at 13 kg is lower than the recommended weight limit now calculated to be 14.86 kg.
Therefore, MOST WORKERS CAN SAFELY PERFORM THE TASK.