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   Lifting Tasks:
Female - Lifting Task Ending Below Knuckle Height (<28")
Male - Lifting Task Ending Below Knuckle Height (<31")
Female - Lifting Task Ending Between Knuckle Height (≥28") & Shoulder Height (≤53")
Male - Lifting Task Ending Between Knuckle Height (≥31") & Shoulder Height (≤57")
Female - Lifting Task Ending Above Shoulder Height (>53")
Male - Lifting Task Ending Above Shoulder Height (>57")
   Lowering Tasks:
Female - Lowering Task Beginning Below Knuckle Height (<28")
Male - Lowering Task Beginning Below Knuckle Height (<31")
Female - Lowering Task Beginning Between Knuckle Height (≥28") & Shoulder Height (≤53")
Male - Lowering Task Beginning Between Knuckle Height (≥31") & Shoulder Height (≤57")
Female - Lowering Task Beginning Above Shoulder Height (>53")
Male - Lowering Task Beginning Above Shoulder Height (>57")
   Pushing Tasks:
Female - Pushing Task Initial Forces
Male - Pushing Task Initial Forces
Female - Pushing Task Sustained Forces
Male - Pushing Task Sustained Forces
   Pulling Tasks:
Female - Pulling Task Initial Forces
Male - Pulling Task Initial Forces
Female - Pulling Task Sustained Forces
Male - Pulling Task Sustained Forces
   Carrying Tasks:
Female - Carrying Task
Male - Carrying Task


Manual Materials Handling
The Liberty Mutual Research Institute for Safety has updated the manual material handling tables originally published by Snook in 1978, and by Snook and Ciriello in 1991. The new “Liberty Mutual Manual Materials Handling Tables” provide both the male and female population percentages capable of performing manual material handling tasks without over exertion, rather than maximum acceptable weights and forces. This manual material handling analysis tool is based on the same “Liberty Mutual Manual Materials Handling Tables” and can be used to perform ergonomic assessments of lifting, lowering, pushing, pulling, and carrying tasks with the primary goal of supporting ergonomic design interventions.

For a detailed description of the LM Tables please read the
       
Select Task:

Lifting Tasks:
  • Female - Lifting Task Ending Below Knuckle Height (<28")
  • Male - Lifting Task Ending Below Knuckle Height (<31")
  • Female - Lifting Task Ending Between Knuckle Height (≥28") & Shoulder Height (≤53")
  • Male - Lifting Task Ending Between Knuckle Height (≥31") & Shoulder Height (≤57")
  • Female - Lifting Task Ending Above Shoulder Height (>53")
  • Male - Lifting Task Ending Above Shoulder Height (>57")

    • Lowering Tasks:
  • Female - Lowering Task Beginning Below Knuckle Height (<28")
  • Male - Lowering Task Beginning Below Knuckle Height (<31")
  • Female - Lowering Task Beginning Between Knuckle Height (≥28") & Shoulder Height (≤53")
  • Male - Lowering Task Beginning Between Knuckle Height (≥31") & Shoulder Height (≤57")
  • Female - Lowering Task Beginning Above Shoulder Height (>53")
  • Male - Lowering Task Beginning Above Shoulder Height (>57")

    • Pushing Tasks:
  • Female - Pushing Task Initial Forces
  • Male - Pushing Task Initial Forces
  • Female - Pushing Task Sustained Forces
  • Male - Pushing Task Sustained Forces

    • Pulling Tasks:
  • Female - Pulling Task Initial Forces
  • Male - Pulling Task Initial Forces
  • Female - Pulling Task Sustained Forces
  • Male - Pulling Task Sustained Forces

    • Carrying Tasks:
  • Female - Carrying Task
  • Male - Carrying Task


  • The illustrations, instructions and principles contained in the material are based on published research and, to the best of our knowledge, current at the time of publication. No attempt has been made to interpret any referenced codes, standards, or regulations. Please refer to the appropriate code, standard, or regulation-making authority for interpretation or clarification.