Washington’s Department of Labor and Industries has created a worksheet based upon the NIOSH Lifting Equation to determine if a lift operation exceeds the recommended limits. A copy of this worksheet can be found here:
Worksheet: Ergonomics Calculations (40.8 KiB, 1,306 hits)
LI = the relative estimate of the physical stress associated with a manual lifting job
Sources: eLCOSH & NIOSH