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Ministry of Labour and Social Security Occupational Health and Safety Centre

Ministry of Labour and Social Security Occupational Health and Safety Centre İSGÜM Bursa Laboratory Canset YAVAŞ Physicist. Content of Presentation. Definitions Health effects

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Ministry of Labour and Social Security Occupational Health and Safety Centre

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  1. Ministry of Labour and Social Security Occupational Health and Safety Centre İSGÜM Bursa Laboratory Canset YAVAŞ Physicist 25/05/2010 Ankara

  2. Content of Presentation • Definitions • Health effects • Vibration Directive • Standarts • Parameters for measurement • Measurement and assessment of whole body vibration • Measurement and assessment of hand arm vibration 25/05/2010 Ankara

  3. Vibration • Vibration refers to mechanical oscillations about an equilibrium point • Frequency is a number of cycles per unit time (in SI units hertz) Animation courtesy of Dr. Dan Russell, Kettering University 25/05/2010 Ankara

  4. Definitions • Hand-Arm Vibration:The mechanical vibration that, when transmitted to the human hand arm system entails risk to the health and safety of workers, in particular vascular bone or joint, neurological or muscular disorders 25/05/2010 Ankara

  5. Definitions • Whole Body Vibration: The mechanical vibration that, when transmitted to the whole body, entails risks to the health and safety of workers,in particular lower-back morbidity and trauma of the spine 25/05/2010 Ankara

  6. Health Effects of Hand Arm Vibration Vacsular Disorders • Dead or white finger • Raynaud’s phenomenon of occupational origin • Vibration-induced white finger Neurological Disorders Carpal Tunel Syndrome 25/05/2010 Ankara

  7. 25/05/2010 Ankara

  8. Health Effects of Whole Body Vibration • Lower-back pain, Back, shoulder or neck disorders Exposure to whole body vibration may cause • Discomfort • Aggravate pre-existing back injuries • Motion sickness (low frequency vibration) 25/05/2010 Ankara

  9. Vibration Directive • For hand - arm vibration; The daily exposure limit value: 5 m/s2 the daily exposure action value :2,5 m/s2 • For Whole body vibration; The daily exposure limit value: 1,15 m/s2 the daily exposure action value :0,5 m/s2 25/05/2010 Ankara

  10. Vibration Directive Obligations of Employers • Determination and assessment of risk assessment of mechanical vibration exposure levels • Avoiding or reducing exposure identifying meausers for control of exposure • Worker information and training • Health Surveillance 25/05/2010 Ankara

  11. Standards • ISO 5349-1:2001 Mechanical vibration- Measurement and evaluation of human exposure to hand-transmitted vibration-Part 1: General requirements • ISO 5349-2:2001 Mechanical vibration - Measurement and evaluation of human exposure to hand-transmitted vibration - Part 2: Practical guidance for measurement at the workplace • ISO 2631-1:1997 Mechanical vibration and shock -Evaluation of human exposure to whole-body vibration - Part 1: General requirements 25/05/2010 Ankara

  12. Measurement Device Measuring equipment should comply with the ISO 8041:2005 Human response to vibration - Measuring instrumentation 25/05/2010 Ankara

  13. Parameters for exposure assessment Time Time 25/05/2010 Ankara

  14. Hand arm Vibration Weighting Wh acceleration Hz 25/05/2010 Ankara

  15. Whole Body Vibration Weighting wd,wk acceleration Hz 25/05/2010 Ankara

  16. X axis: Back to chest Y axis: Left to right Z axis: Head to toe x 25/05/2010 Ankara

  17. X axis: Trough the hand Y axis: Across the hand Z axis: Along the lenght of the hand arm 25/05/2010 Ankara

  18. Measurement of Whole Body Vibration 25/05/2010 Ankara

  19. Assessment of Whole Body Vibration • Daily Vibration Exposure A(8) • Vibration Dose Value (VDV) (Both measures are dependent on a measured acceleration value) A x (8) : 1,4*awx* √Texp/T0 T0 : 8 hourreference period A y (8) : 1,4*awy* √Texp/T0 Texp: Exposure time A z (8) : 1*awz* √Texp/T0 25/05/2010 Ankara

  20. Crest Factor 25/05/2010 Ankara

  21. Assessment of Whole Body Vibration • Vibration Dose Value (VDV) More sensitive to peaks VDV exp,x : 1,4*VDVx* (Texp/Tmeas)1/4 m/s1,75 VDV exp,y : 1,4*VDVy* (Texp/Tmeas) 1/4m/s1,75 VDV exp,z : 1*VDVz* (Texp/Tmeas) 1/4m/s1,75 Texp: Exposure time Tmeas:Measurement time 25/05/2010 Ankara

  22. Daily Exposure A(8) where there is one task 25/05/2010 Ankara

  23. Daily Exposure A(8) where there is more than one task 25/05/2010 Ankara

  24. Vibration Dose Value where there is one task 25/05/2010 Ankara

  25. Vibration Dose Value where there is more than one task 25/05/2010 Ankara

  26. Measurement of Hand Arm Vibration 25/05/2010 Ankara

  27. Assessment of Hand Arm Vibration • Daily Exposure Value A (8) ahwx : Frequency weighted (rms) acceleration value for x axis ahwy : Frequency weighted (rms) acceleration value for y axis ahwz : Frequency weighted (rms) acceleration value for z axis Total Vibration Value ahv : √a2 hwx+ a2 hwy+ a2hwz A (8): ahv* √Texp/T0 25/05/2010 Ankara

  28. Daily Exposure A(8) 25/05/2010 Ankara

  29. Daily Exposure A(8) Where there is more than one task 25/05/2010 Ankara

  30. cyavas@csgb.gov.tr Thank you 25/05/2010 Ankara

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