Taking a Measured Approach to Hand-Arm Vibration in the Workplace

Hand-arm vibration syndrome (HAVS) is a serious risk for workers who regularly use hand-operated power tools. Traditional methods of estimating vibration exposure, like self-reporting, often fall short. A more accurate and effective approach is profiling tasks to understand the true vibration exposure associated with each job. This allows for better risk management and ensures compliance with health and safety regulations.

Let’s illustrate this with an example: roofing. A seemingly simple task like installing a new roof actually involves several distinct activities, each with its own vibration profile. These activities might include using a nail gun, circular saw, disc cutter, and impact driver. Instead of simply estimating the total time spent using these tools, we break down the job into measurable units.

For instance, we can define a “unit of work” as one roof. We then analyze the vibration exposure associated with each tool used on that roof. Let’s say a typical roof requires 500 nails. If each nail gun use results in half a second of vibration, we can calculate the total vibration exposure from the nail gun for that roof. We repeat this process for each tool, considering factors like the number of battens cut with the circular saw or the time spent using the disc cutter.

Once we have the vibration exposure for each tool, we can combine these figures to get an overall vibration exposure for completing one roof. This data can then be scaled for different sized roofs. Furthermore, we can factor in the number of workers on the job and the average time it takes to complete a roof (e.g., four days) to calculate the daily vibration exposure per worker.

This task profiling method can be applied to various trades. For example, a surfacing contractor might measure vibration exposure based on the perimeter distance and total area being laid, while a carpenter could calculate it per square meter of stud work installed. The key is to identify the specific tasks involved and measure the vibration exposure associated with each.

The advantage of this approach is that it allows for accurate prediction of vibration exposure on any given project. By knowing the size of the roof, car park, or other project, and having a database of profiled tasks, we can estimate the vibration exposure per person.

Finally, and crucially, this information must be communicated to the workforce. Workers should understand how their daily tasks contribute to their overall vibration exposure and be able to explain it if asked. This empowers them to take ownership of their health and safety.

It’s also essential to remember that all vibration exposures must be kept below the legal limit. Beyond compliance, employers have a duty to reduce vibration exposure “as low as reasonably practicable.” This can be achieved through various measures, such as investing in low-vibration tools, implementing safe work practices, and rotating tasks to share exposure among workers. By taking a proactive and data-driven approach, we can effectively manage hand-arm vibration and protect workers’ health.