Benchmark ergonomic risk levels, focus on specific task details
and perform "what-if" analyses
NIOSH Lifting Equation
The NIOSH lifting equation is used to
evaluate a manual lifting task to determine the Recommended Weight
Limit (RWL) and the Lifting Index (LI).
The interactive tool allows you to perform "what if" analysis
of lifting factors by changing variables to determine optimal lifting
limits.
Analysis factors include:
- Object weight
- Hand location (origin and destination)
- Lift angles
- Frequency rate
- Duration
- Object coupling
Strain Index
Does the job impose a risk for arm/hand
musculoskeletal disorders? Use the Strain Index* to determine the
combined effect of exertions, frequency, posture, speed and duration.
Scores greater than or equal to 7 have been associated with arm/hand
musculoskeletal disorders.
*Moore, JS, and Garg, A: The strain index: a proposed
method to analyze jobs for risk of distal upper extremity disorders,
Am. Ind. Hyg. Assoc. J. (56), May 1995: 443-455.
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