712_12 CH 13 Manual Handling

712_12 CH 13 Manual Handling - Manual Materials Handling...

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1 Chapter 13 Manual Material Handling Copyright (c) 2012 P. Neumann, BSc, MSc, LicEng, PhD, LEL, Eur.Erg – This teaching material is not for resale or commercial use. Note that at ribution errors and missing acknowledgements may exist in this material; for which the author apologises Manual Materials Handling MMH • 27% of industrial injuries • 60% of costs in industry • 93 x 10 6 days lost/year • Both acute and chronic Peak and Cumulative loading Konz & Johnson 2004 One time event Ongoing / prolonged Risk Can be managed by better job design 1. Biomechanical Risk – Calculate the load 2. Physiological Risk – Compare to capability 3. Psychological Risk Konz & Johnson 2004 Issues What types of factors will influence risk in MMH tasks? 1. 2. 3. Konz & Johnson 2004 Issues 1. Task Adjust permanently Location (esp reach distance & height) •M a s s Grip-ability & stability Frequency 2. Technique - Can train but we all ‘slip up’ 3. Individual - Selection or human rights violation Konz & Johnson 2004
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2 Pushing and Pulling • Force limits; factors: – Handles – 1-2 hands – Body Posture and Grip Location Direction push/pull etc – Direction – push/pull etc. Konz & Johnson 2004 Pushing and Pulling • Two hands better than one • Force decreases with repetition • Initial strength increases then sustained • Pushing stronger than pulling • Push at waist level pull at thigh level
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712_12 CH 13 Manual Handling - Manual Materials Handling...

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