i Ergonomics Enews - Musculoskeletal injuries (MSIs): What they are and the benefits of preventing them

 

Controlling hand-arm vibration exposure and risk reduction

There are many controls that can be implemented to reduce the risk of exposure to hand-arm vibration (HAV).  When considering what controls to implement, you should always follow the hierarchy of controls and start with those that are the most effective.

The two main factors that affect the risk of exposure to HAV are the vibration level and the frequency/duration of exposure.

Reducing the vibration level

  • Eliminate the need for vibrating power tools or hand-guided equipment by changing the work task where possible.
  • Replace high-vibration tools with tools that generate lower levels of vibration. When purchasing new tools, review the vibration levels reported by the manufacturer.
  • Use tools that have built-in vibration dampeners or isolators.
  • Keep tool attachments (e.g., drill bits, chisels) sharp, and replace immediately if damaged.
  • Ensure that tools are properly maintained and in good working order.
  • Always use the right tool for the job.
  • Let the tool do the work and grip the tool with the least amount of grip force possible to still retain control.
  • Use proper technique and avoid using tools in awkward positions and postures.

Reducing exposure frequency and duration

In addition to reducing the vibration exposure level, reducing exposure frequency and duration can help minimize the risk of HAV exposure. An effective and easy method for reducing exposure duration is to introduce job rotation and take frequent breaks. Where time and scheduling allow, consider spreading the tasks requiring use of handheld power tools or hand-guided equipment over multiple days.

Control exposure to cold

Exposure to the cold significantly increases the risk of exposure to HAV. Move work indoors where possible, and use portable heaters or wear warm and dry gloves when working in cold conditions. Wrap metal handles to provide thermal insulation.

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We're here to help

For resources, please visit worksafebc.com/ergonomics. If you have questions about ergonomics, human factors or need help managing the risk of MSI in your workplace, please contact us at HumanFactors@worksafebc.com

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