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Biomechanics and Work

Biomechanics and Work - 23kg Metric 51lb English HM –...

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Biomechanics and Work 4/1/2009 Biomechanics and Work 04/01/2009 Pre-Lecture Note: Even though there are anthropometric charts, sometimes one will still have to come up with their own data. Why is biomechanics and why is it important to study? Webster says: “the mechanics of biological and especially muscular activity” (as in locomotion or exercise) Why biomechincs really important for everday life? $20 Billion Dollars worth of annual importance Injuries and lawsuits from injuries Note: Anthropometrics gives limitations. Chart: Total recordable non-fatal occupational injury and illness incidences rates by selected industries, 2004-2005 NIOSH Standards Used to determine which biomechanical motions used in a specific application (lifting) are more at risk for injury Equation Based: RWL = LC x HM x VM x DM x AM X FM x CM RWL – Recommended weight limit http://www.ccohs.ca/oshanswers/ergonomics/niosh/calculating_rwl.html LC – Load Constant - A set weight used for the purpose of the equation
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Unformatted text preview: 23kg Metric 51lb English HM – Horizontal Multiplier – the distance at which the load must be held from the body by the worker. HM – (25/H) Metric Biomechanics and Work 4/1/2009 Biomechanics and Work 4/1/2009 HM – (10/H) English In INCHES (less than one) VM – Vertical Multiplier – The distance at which the load is picked up from the ground DM – Distance Multiplier – the distance at which the load must travel AM – Asymmetric Multiplier – The amount of rotation (in degrees) the body must undergo during lifting FM – Frequency Multiplier – How often is the motion repeated CM – Coupling Multiplier – How easy is it to grip the load Example 30lb toaster Where did they get all this from? Static biomechanics Dynamics Biomechanics Kinetics – physical limitation on how we can move Biomechanics and Work 4/1/2009...
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Biomechanics and Work - 23kg Metric 51lb English HM –...

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