Hand-Arm Vibration Risk Assessment: A Practical Guide for UK Tradespeople

Hand-arm vibration (HAV) is one of the most common occupational health risks in the UK trades. Regular use of power tools — angle grinders, hammer drills, disc cutters, needle guns, chainsaws — can cause Hand-Arm Vibration Syndrome (HAVS) and carpal tunnel syndrome, both of which are irreversible once established. A hand-arm vibration risk assessment is the legal starting point for managing that risk properly.

The Legal Framework

The Control of Vibration at Work Regulations 2005 set two key values for hand-arm vibration, measured as an eight-hour energy-equivalent acceleration (A(8)):

These Regulations are enforced by the HSE and sit alongside the general duty to assess risks under Regulation 3 of the Management of Health and Safety at Work Regulations 1999. The two work together: the Management Regs require a suitable and sufficient risk assessment; the Vibration Regs specify the values and controls you must act on.

Who Needs a HAV Risk Assessment?

If your workers regularly use vibrating hand-held or hand-guided tools — even occasionally but with high-vibration tools — you need a HAV risk assessment. This applies to self-employed contractors as much as employers. Common trades affected include groundworkers, concreters, demolition operatives, gas engineers, fabricators, mechanics and landscapers.

Step 1 — Identify the Tools and Tasks

List every vibrating tool your workers use. For each one, record:

• The tool type and make/model
• The vibration magnitude (m/s²) — available from the manufacturer's declaration or the HSE's tool vibration database
• Typical daily trigger time (how long the tool is actually running, not just held)

Be honest about trigger time. An angle grinder used for six hours in a day is not running for all six hours — actual trigger time for continuous grinding work is typically 50–75% of the task duration.

Step 2 — Calculate Daily Exposure

Use the HSE's ready-reckoner (available on hse.gov.uk) or the formula:

A(8) = vibration magnitude × √(trigger time ÷ 8)

For example, a 110 V SDS drill with a declared vibration of 8 m/s² used for 45 minutes trigger time gives an A(8) of approximately 3.0 m/s² — above the EAV, requiring action.

Where workers use multiple tools in a day, you must combine their exposures mathematically. The HSE's calculator handles this automatically.

Step 3 — Apply the Hierarchy of Controls

Simply knowing the numbers is not enough. The Vibration Regulations require you to eliminate or reduce exposure so far as is reasonably practicable, and — once you reach the EAV — to have a programme of controls in place. Work through the hierarchy:

1. Eliminate – can the task be done without a hand-held vibrating tool? Hydraulic or mechanical breaking instead of hand-held breakers, for instance.
2. Substitute – replace a high-vibration tool with a lower-vibration alternative. Manufacturers publish vibration data; compare models. A well-maintained disc cutter will typically vibrate less than a worn one.
3. Engineering controls – anti-vibration mountings, tool suspensions, balanced equipment.
4. Administrative controls – job rotation, planned trigger-time limits, maintenance schedules (worn or blunt tools vibrate more). Ensure workers take breaks away from the tool.
5. PPE – anti-vibration gloves can provide marginal benefit for some frequencies but they are not a primary control and must never substitute for the steps above. Cold reduces blood flow and worsens risk, so keeping workers warm matters too.

Step 4 — Health Surveillance

Once workers are regularly exposed at or above the EAV, the Regulations require you to put health surveillance in place. This is ongoing — not a one-off medical. It typically involves:

• A baseline questionnaire before or shortly after starting exposure
• Periodic structured interviews or examinations by an occupational health professional
• Referral for clinical assessment if early symptoms are reported

Early symptoms of HAVS include tingling, numbness or whitening of fingers (particularly in cold or wet conditions). Workers must be told to report symptoms promptly — catching HAVS early can prevent progression.

Step 5 — Information, Instruction and Training

Workers need to understand the risks, the exposure limit system, how to use and maintain tools correctly, and when and how to report symptoms. This doesn't require a formal training course but it does need to be documented.

Recording Your Risk Assessment

A suitable and sufficient HAV risk assessment should record:

• The tools and tasks assessed
• Calculated or estimated daily exposures
• Controls already in place
• Further action required, with responsible person and timescale
• Review date (or trigger for review — for example, new tools or new tasks)

If you produce a RAMS (Risk Assessment and Method Statement) for a construction task under CDM 2015, your HAV risk assessment should feed into it, but a standalone HAV assessment is perfectly appropriate for ongoing workshop or maintenance work.

Review and Keep It Live

A HAV risk assessment is not a one-time exercise. Review it when you introduce new tools, change working patterns, receive a report of symptoms, or when health surveillance flags a concern. The Regulations expect a dynamic response, not a filed document.

HAVS is preventable. Getting the assessment right — with real trigger times, accurate vibration data and genuine controls — is what makes the difference between paper compliance and actually protecting people.