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Signal Risk Factor
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Explanation
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Examples
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Performance of the same motion or motion pattern every few seconds for 2 hours continuously, or more than a total of 4 hours, excluding mandatory breaks.
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The job requires rapid repetition of the same movements which stresses the body parts performing the motion.
Different parts of body may be affected, depending on the motion, fingers, arms, neck, knees or ankles.
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Inserting and tightening 4 bolts in 15 seconds on a moving conveyor line. Intensive data entry requiring rapid repeated keying. Climbing stairs.
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Unsupported fixed or awkward work posture for more than 1 hour continuously, or a total of 4 hours, excluding mandatory breaks.
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Unsupported fixed postures involve holding the arms, back or feet in the same position without support.
Awkward postures become a risk factor when the wrist or neck is noticeably bent; the elbow is away from the body (indicates shoulder movement); the back is bent forward, backward or to the side; the knee is bent to kneel or squat.
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Keying with the fingers and no arm movement, and no forearm support.
Sitting without back support.
Sitting with the feet dangling.
Bending the neck back to see while painting a ceiling.
Reaching to get items more than 20 inches away from the worker.
Working overhead.
Operating a foot pedal while standing.
Picking/weeding crops near the ground (not raised beds) by hand or with short handled tools.
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Use of vibrating or impact tools or equipment for more than 1 hour of continuous use, or more than a total of 2 hours.
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Jobs that involve vibration exposure from hand tools such as sanders, grinders and chain saws.
Whole body vibration occurs when standing or sitting while operating a truck or other heavy machinery without vibration dampening over rough or uneven surfaces.
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Polishing metal parts to a high luster.
Grinding burrs from machined parts.
Cutting out window and door openings with a power saw.
Removing mineral deposits with a chipping hammer.
Operating an excavator, forestry tractor, or forklift on uneven ground.
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Using forceful hand exertions for more than a total of 2 hours.
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Holding an object that weights 10 pounds or more in the hand.
Pinching an object with 2 or more pounds of force.
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Holding a gallon of whole milk in a plastic container.
Holding a gallon can of paint.
Pinching open a small binder clip.
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Unassisted frequent or forceful manual handling.
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Lift more than 35 pounds in an awkward posture;
Lift more than 35 pounds near the body more than 25 times;
Lift 15 pounds or more 2 feet in front of the body more than 25 times;
Repeated lifting of more than 10 pounds for more than 1 hour;
Pushing or pulling with more than 20 pounds of force for more than 1 hour.
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Lifting, pushing or pulling adult patients.
Repeatedly lifting a case with four gallons of water.
Repeatedly lifting 20 pound items from the trunk of a car.
Pushing a shopping cart loaded with 5 (40 pound) bags of dog food, stopping and starting for more than one hour.
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