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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 attribution 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) Mass 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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