TABLE 2.

Work conditions not covered by the NIOSH RNLE (and the clinical guidelines)

• Lifting/lowering with 1 hand

• Lifting/lowering for more than 8 hours

• Lifting/lowering while seated or kneeling

• Lifting/lowering in a restricted work space

• Lifting/lowering unstable objects

• Lifting/lowering while carrying, pushing, or pulling

• Lifting/lowering with wheelbarrows or shovels

• Lifting/lowering with high-speed motion (faster than about 30 inches/ second)

• Lifting/lowering with unreasonable foot/floor coupling (less than 0.4 coefficient of friction between the sole and the floor)

• Lifting/lowering in an unfavorable environment (temperature significantly outside 66–79°F [19–26°C] range; relative humidity outside 35–50% range).

• (Highly repetitive lifting more than 3 times per minute)

• (Lifting/lowering from the floor with hands below midshin)

• (Lifting overhead)

NIOSH RNLE, National Institute for Occupational Safety and Health Revised NIOSH lifting equation.

MacDonald. Clinical guidelines for occupational lifting. Am J Obstet Gynecol 2013.