cPART A

A worker is lifting a box from a starting vertical height of 34 inches and placing the box at a vertical destination above the shoulders, approximately 65 inches high. The box is held reasonably close to his body (use 10 inches). The shape of the box is good, but there are no cut-outs or handles for the hands, so the hand-to-container coupling classification is fair. The worker is performing the lift with no asymmetry. The worker handles approximately 4 boxes per minute and is lifting these 50-pound boxes throughout his eight- hour shift.

With these conditions, use this NIOSH Lifting Analysis Worksheet (PDF) Download NIOSH Lifting Analysis Worksheet (PDF)to calculate the recommended weight limit (RWL) at the origin and at the destination. Then, calculate the lifting index (LI) at the origin and at the destination.

LIFTING ANALYSIS WORKSHEET DEPARTMENT SFTY 321 JOB DESCRIPTION JOB TITLE Box Lifting Determine RWL ANALYST'S NAME Determine LI DATE STEP 1. Measure and record task variables Object Weight Hand Location Vertical Asymmetric Angle (deg.) Frequency Rate Duration Object (Ibs) Distance Dest lifts/min Coupling Origin Origin Destination Hrs L(AVG) L(MAX) H V H V D A A F C 50 50 10 34 10 65 31 0 0 4 8 fair STEP 2. Determine the multipliers and compute the RWLs RWL = LC x HM x VM X DM X AM X FM X CM ORIGIN RWL X 0.96 0.88 0.45 DEST. RWL 0.74 0.88 0.45 STEP 3. Compute the LIFTING INDEX ORIGIN LIFT INDEX OBJECT WEIGHT 50 RWL DESTINATION LIFT INDEX OBJECT WEIGHT 50 RWLTable 1 Horizontal Multiplier H HM H HM in cm $10 1.00 $ 25 1.00 11 .91 28 .89 12 .83 30 .83 13 .77 32 .78 14 .71 34 .74 15 .67 36 .69 16 .63 38 .66 17 .59 40 .63 18 56 42 .60 19 .53 44 .57 20 .50 46 .54 21 .48 48 .52 22 .46 50 50 23 .44 52 48 24 .42 54 .46 25 .40 56 .45 >25 .00 58 .43 60 42 63 .40 >63\fTable 3 Distance Multiplier D DM D DM in cm 1.00 $25 1.00 15 .94 40 .93 20 .91 55 .90 25 89 70 30 88 85 87 35 87 100 87 40 .87 115 .86 45 86 130 86 50 .86 145 .85 55 85 160 .85 60 .85 175 .85 70 .85 3175 .00 370 .00Table 4 Asymmetric Multiplier A AM deg 0 1.00 15 95 30 90 45 86 60 .81 75 .76 90 .71 105 66 120 62 135 57 >135 00Table 5 Frequency Multiplier Table (FM) Frequency Work Duration Lifts/min (F) $ $1 Hour > 1 but 2 but * 8 Hours V 30 V 30 V 30 $ 0.2 1.00 1.00 95 0.5 .97 .97 1 00 .00 100 .00 .00 .00 .00 .00 00 .00 .00 .00 00 >15 .00 .00 .00 .00 .00 .00 + Values of V are in inches. $ For lifting less frequently than once per 5 minutes, set F = 2 lifts/minute. Used with permission: OSHA: NIOSH Lifting Analysis Worksheet