Monarch Hydraulics Assembly Line Ergonomics

1
Monarch HydraulicsAssembly Line Ergonomics

• The Lifting Equation

2
The Lifting Equation

• National Institute for Occupational Safety and
  Health (NIOSH)
• Estimates the risks involved with specific lifts
• Main tool to enforce OSHAs general duty clause
• General duty clause
• Each employer shall furnish a place of
  employment which (is) free from recognized
  hazards that are causing or likely to cause
  serious physical harm to (its) employees

3
What is the Lifting Equation?

• Defines whether a lift can be considered safe
• Allows employers to improve working conditions
• Cost - Back injuries contribute to 33-38 of all
  workers compensation costs

4
The Lifting Equation

• AL (IW)(HF)(VF)(DF)(FF)
• MPL 3AL
• Where AL Action Limit
• MPL Maximum Permissible Limit
• IW Ideal Weight that can be lifted (51 lbs.)
• HF Horizontal factor (0-1)
• VF Vertical factor (0-1)
• DF Distance factor (0-1)
• FF Frequency factor (0-1)

5
Assumptions of Equation

• Smooth Lifts
• Two handed lift with no twisting
• Moderate width ( lt 30in )
• Good couplings
• Favorable environment
• Unrestricted lifting postures

6
ExampleMonarch pump motors

• Pump motors are stored on 4x4 pallets near
  assembly line
• Assuming worst case scenario
• HF(24in) .25
• VF(5in) .74
• DF (40in) .8
• FF(1part/min) .94
• AL 51 lbs.(.25)(.74)(.8)(.94) 7.06 lbs.
• MPL 7.09(3) 21.27 lbs.

7
Summary

• Lifting equation can be used to estimate lifting
  risks
• The equation is based on an ideal weight and
  various multipliers
• The weight of Monarchs pumps are within OSHA
  guidelines