From the Research
Action should be taken to reduce Hand-Arm Vibration Syndrome (HAVS) exposure when vibration levels reach or exceed the Exposure Action Value (EAV) of 2.5 m/s² A(8), which represents a daily exposure averaged over an 8-hour period. At this level, employers are legally required to implement measures to reduce exposure and risk. These measures include:
- Providing alternative work methods that eliminate or reduce exposure
- Implementing job rotation to limit individual exposure time
- Supplying suitable anti-vibration tools and equipment
- Ensuring proper maintenance of tools to minimize vibration
- Providing appropriate training on proper tool use and vibration risks
- Conducting health surveillance for affected workers. The 2.5 m/s² threshold is established because regular exposure above this level significantly increases the risk of developing HAVS, which can cause permanent nerve damage, reduced blood circulation, and loss of dexterity in the hands and fingers, as noted in studies such as 1. There is also an Exposure Limit Value (ELV) of 5 m/s² A(8), which should never be exceeded, as exposure above this level presents a severe risk of developing HAVS, and is supported by the most recent research, including 2 and 3. It's worth noting that while the exact vibration level at which action should be taken is well established, the psychological impact of HAVS, as explored in 2, and the health effects associated with occupational exposure to hand-arm or whole body vibration, as discussed in 3, highlight the importance of proactive measures to reduce exposure and mitigate risks. However, the most critical factor in determining the need for action is the vibration level, and the EAV of 2.5 m/s² A(8) serves as a crucial threshold for initiating preventive measures, as emphasized by the need to prioritize morbidity, mortality, and quality of life outcomes.