Take Test: Midterm Exam QUESTION 12 NIOSH Lifting Equation Exercise: (50 points total) From the information provided you are to determine if this worker is at high risk for back injury and what workstation redesign can be done to reduce this risk by calculating the RWL and LI. (25 points each) NIOSH Lifting equation: RWL=LC x HM x VM x DM x AM x FM x CMLI equation: LI= Weight (Load) RWL Job Title: Dishwasher Machine Un-loader Job Description: The job takes between 45 minutes to 1 hour to complete and the frequency rate is Slifts/minute. The trays the worker handles are well-designed handhold cut outs (coupling) are very well designed (C= 1.0). Job Analysis: The task variable data are measures and recorded on the job. At the origin of the lift, the horizontal distance (H=20 in) and the vertical origin distance (V= 44 in) and the angle of symmetry is (A=30 degrees). The destination horizontal distance is (H= 20 in) and the vertical distance is (V= 7 in) and the angle of symmetry is (A=30 degrees). The traveling vertical distance is (D= 37 in). The trays normally weight 5lbs to 20lbs, but for this example assumes that all of the trays are 20 lbs. Object weight in (Ibs) Hand Location Vertical Distance Asymmetric Angle Frequency Rate Duration Object Coupling L (AVE) L (AVE) I Origin Destin Life/min (F) Hours 20lbs 20 lbs 44 20 5/min V Good= 1 NIOSH Lifting equation: RWL=LC x HM x VM x DM x AM x FM x CM RWL origin |LC HM VM DM AM FM CM Total 50 90 .0 14.4 lbs RWL Destination y HM VM DM AM FM CM Total 90 .80 1.0 13.3 lbs N+F10 (Mac)