Safety Guidelines and Standards (the NIOSH Lifting Equation)
It is imperative to refer to existing federal standards and guidelines when determining a proper ergonomically safe and correct procedure. Not only is this important to ensure the safety of the worker(s), but also to ensure the reduction in potential future liability. Therefore, the revised NIOSH Lifting Equation is an excellent source of information to determine what a single worker should or shouldn’t perform.
Based upon the NIOSH lifting equation and assuming that this diagram is analogous to the lifting of a PEMS into the cab of a heavy-duty truck the upper threshold of the total weight of a PEMS device typically should not exceed 45 lb (20 kg)., in order to be congruent with national and international safety standards. This not only allows for much more safe maneuverability and ease of use, but it also reduces the amount of workers required to safely perform such tasks.
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—Henry David Thoreau (1817–1862)