NIOSH lifting - Chapter 8 Manual Materials Handling Limits...

Info iconThis preview shows pages 1–13. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chapter 8 Manual Materials Handling Limits Introduction Robotics has decreased manual labor repetitive and structured jobs mostly successful industries CATCH 22: capital investment for robots, need to be successful to get investment Unstructured jobs still manual labor construction, assembly, equipment repair, fire fighting, police, nursing Results of 1981 NIOSH Study: Overexertion claimed cause ~ 60% of low back pain. If significant lost time, less than 1/3 with back pain return to previous work. Overexertion injuries account for ~1/4 of all reported occupational injuries in the US (some industries ~ 1/2) ~ 2/3 of overexertion claims involved lifting loads, ~ 20% pushing or pulling Factors affecting manual material handling system Worker characteristics (Individual) Physical: age, anthropometrics, posture Sensory: visual, audit, tactile, proprio etc Motor: strength, ROM, endurance Psychomotor: coordination, RT Personality: job satisfaction, SES Training/experience: education Health status: previous, drug use Leisure time activities: 2nd job, sedentary Factors affecting manual material handling system Material/container characteristics (Task & Environment) . Load. Dimensions. Distribution of load 1 vs 2 hand, Moment Arm about back Couplings (handles). Stability of load (liquids & bulks). Factors affecting manual material handling system Task & workplace characteristics (environment) Workplace geometry Frequency/duration/pace. Complexity environment: temperature, noise Factors affecting manual material handling system Work practice characteristics individual: speed and accuracy Organization: teamwork, safety functions, medical staff Administrative: safety incentives, work shift length, rotation, personal protective devices 3 strategies to prevent overexertion injury 1) design the task for all workers 2) select workers believed to be at low risk 3) train workers to reduce personal risk levels Often determined by socio-legal-economic considerations Lifting Limits in Manual Handling Setting safe limits for employees gold standard for workplace Needs to consider Epidemiology of MS injury Biomechanical concepts Physiological principles Psychophysical lifting limits Lifting Limits in Manual Handling Note different limiting factors 1981: NIOSH equation to evaluate sagittal plane lifting objective method to determine safe load Recommendations: lifting smooth, with no sudden acceleration objects of moderate width (hand separation of less than 75 cm (29.5 inches) Good couplings (secure handholds and low foot slippage potential) Favourable temperatures for lifting 1981: NIOSH equation to evaluate sagittal plane lifting objective method to determine safe load Need to define 4 job attributes location of CofM (or handgrip center) of the object in horizontal direction ( H ) horizontally from midpoint of ankles 1981: NIOSH equation to...
View Full Document

This note was uploaded on 11/26/2009 for the course PSYC 2270 taught by Professor Nicholaskelling during the Fall '08 term at Georgia Institute of Technology.

Page1 / 50

NIOSH lifting - Chapter 8 Manual Materials Handling Limits...

This preview shows document pages 1 - 13. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online