Question

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According to the NIOSH Lifting Equation, the best case scenario for the RWL if the horizontal...

According to the NIOSH Lifting Equation, the best case scenario for the RWL if the horizontal distance is V=6 inches is …

a. 51 lbs

b. 42 lbs

c. 18 lbs

d. 45 lbs

Solutions

Expert Solution

According to NIOSH Lifting Equation

RWL = LC (51) x HM x VM x DM x AM x FM x CM

Task variables needed to calculate the Recommended Weight Limit (RWL) RWL:

• H = Horizontal location of the object relative to the body

• V = Vertical location of the object relative to the floor

• D = Distance the object is moved vertically

• A = Asymmetry angle or twisting requirement

• F = Frequency and duration of lifting activity

• C = Coupling or quality of the workers grip on the object

(M stands for Multiplier)

We are going to use the following tables for multipliers issued by NIOSH:

Step 1 – Measure and Record Task Variables

Considering an example of Shifting of boxes from one conveyor to another

Lifting Task Horizontal Location H Vertical Location V Travel Distance D Angle of Asymmetry (0-135) Coupling(1= Good, 2= Fair, 3 = Poor) Frequency (0.2 - 15 lifts/min) Average Load Lifted (lbs.) Max Load Lifted (lbs.) Duration(1,2,8 hours)
Start 20 6 16 0 2 2.4 12 12 8
End 16 20 16 0 2 2.4 12 12 8

Step 2 – Enter Data, Calculate RWL

Using the data from above given tables

Task LC HM VM DM AM CM RWL
1 51 0.50 0.82 0.93 1 0.95 18.4

Ans : Option (c) 18lbs

genius_generous answered 2 years ago
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