Vibration risk assessment

Aim of the risk assessment

The aim of the risk assessment is to help you decide what you need to do to ensure the health and safety of your employees who are exposed to vibration.

Your risk assessment should:

  • identify where there might be a risk from vibration and who is likely to be affected
  • contain a reasonable estimate of your workers' exposures
  • identify what you need to do to comply with the law for example whether vibration control measures are needed, and, if so, where and what type
  • identify any employees who need to be provided with health surveillance and whether any are at particular risk

You must record the findings of your risk assessment. You need to record in an action plan anything you identify as being necessary to comply with the law, setting out what you have done and what you are going to do, with a timetable and saying who will be responsible for the work.

You will need to review your risk assessment if circumstances in your workplace change and affect exposures. Also review it regularly to make sure that you continue to do all that is reasonably practicable to control the vibration risks.

You can find a definition on what reasonably practicable means here[61]

Even if it appears that nothing has changed, you should not leave it for more than about two 2 years without checking whether a review is needed.

Getting started with your assessment

If you answered 'yes' to any of the questions in the section 'Do you have a vibration problem at work?'[62] you will need to assess the risks to decide whether any further action is needed, and plan how you will do it.

To carry out your risk assessment you will need to identify whether there is likely to be a significant risk from hand-arm vibration (HAV). You should:

  • find out from your employees and their supervisors which, if any, processes involve regular exposure to vibration - for example processes using the equipment listed in 'Do you have a hand-arm vibration problem at work?' or other vibrating equipment
  • see whether there are any warnings of vibration risks in equipment handbooks
  • ask employees if they have any of the HAV symptoms described in these web pages and whether the equipment being used produces high levels of vibration or uncomfortable strains on hands and arms

Consultation

It is important during this whole process to discuss HAV with your supervisors, employees and the trade union safety representative or employee representative.

You will need to develop and agree a policy for managing vibration risks which will provide reassurance to your employees about their job security and to explain why co-operating with your risk control measures and health surveillance programme will be in their best interests.

Assess who is at risk

If there is likely to be a risk you need to assess who is at risk and to what degree. The risk assessment needs to enable you to decide whether your employees' exposures are likely to be above the Exposure Action Valve (EAV) or Exposure Limit Value (ELV) and to identify which work activities you need to control.

Competence

You could do the risk assessment yourself or appoint a competent person to do it for you. The person who does the risk assessment should have read and understood these pages, have a good knowledge of the work processes used in your business and be able to collect and understand relevant information.

They should also be able to develop a plan of action based on their findings and ensure it is introduced and effective. They will need to:

  • make a list of equipment that may cause vibration, and what sort of work it is used for
  • collect information about the equipment from equipment handbooks - for example make, model, power, vibration risks and vibration information
  • make a list of employees who use the vibrating equipment and which jobs they do
  • note as accurately as possible how long employees' hands are actually in contact with the equipment while it is vibrating – in some cases this 'trigger time' may only be a few minutes in several hours of work with the equipment
  • ask employees which equipment seems to have high vibration and about any other problems they may have in using it, for example its weight, awkward postures needed to use the tool, difficulty in holding and operating it
  • record the relevant information they have collected and their assessment of who is likely to be at risk

Prioritise your actions

Group your work activities according to whether they are high, medium or low risk. Plan your action to control risks for the employees at greatest risk first. Your rough groupings could be based on the following prioritisation.

High risk (above the ELV)

Employees who regularly operate:

  • hammer action tools for more than about one hour per day
  • rotary and other action tools for more than about four hours per day

Employees in this group are likely to be above the exposure limit value set out in the Regulations. The limit value could be exceeded in a much shorter time in some cases, especially where the tools are not the most suitable for the job.

Medium risk (above the EAV)

Employees who regularly operate:

  • hammer action tools for more than about 15 minutes per day
  • some rotary and other action tools for more than about one hour per day

Employees in this group are likely to be exposed above the exposure action value set out in the Regulations.

The rough groupings described above should be enough for you to do a basic risk assessment. This will enable you to decide whether exposures are likely to exceed the exposure action value and exposure limit value and to allow you to plan and prioritise your control actions effectively.

For further information visit HSE's guidance on controlling the risks[63].

Alternatively, you may choose either to use available vibration data or to have measurements made to estimate exposures if you want to be more certain of whether the risk is high, medium or low. A more detailed exposure assessment may help you:

  • decide which control actions might be most effective and practicable in reducing vibration exposure
  • be more certain whether exposures are likely to exceed the action or limit values
  • check whether your controls are effective

If you decide to do this, read the estimating exposure guidance below.

Estimating exposure

HSE provides vibration magnitude data for use in an initial risk assessment.

You may be able to get suitable vibration data from your equipment handbook, or from your equipment supplier. There are also some online databases which may have suitable vibration data.

If you plan to use the manufacturer's vibration data you should check that it represents the way you use the equipment (see 'Duties of manufacturers and suppliers') since some data may underestimate workplace vibration levels substantially.

Ask the manufacturer for an indication of the likely vibration emission of the tool when your employees are using it. If you are able to get vibration data from the manufacturer which is for common tools reasonably representative of the way you use the equipment, it should be suitable for you to use in estimating your employees' exposure.

Table 1 Some typical vibration levels for common tools

Tool type Tool characteristic, inserted tool, size, process Range (m/s²) Recommended Initial value (m/s²)
Drills Standard drill bit 2 - 5 5
Drills Hole saw 4 - 12 10
Drills - Core 78 - 107 mm 6 - 8 8
Drills - Impact 5 and 8 mm masonry bit 7 - 13 11
Grinders - Angle 100 - 180 mm 3 - 10 7
Grinders - Angle 125 and 100 mm Flapper discs 2 - 5 4
Grinders - Angle 220 - 300 mm 4 - 11 9
Grinders - Die   5 - 10 8
Grinders - Straight   4 - 9 8
Needle scalers Non-vibration reduced 12 - 26 19
Needle scalers Vibration reduced 3 - 8 7
Nibblers   7 - 12 12
Reciprocating saws   7 - 27 18
Sanders - Random-orbital   6 - 14 12
Sanders Orbital   4 - 12 9
Breakers   7 - 18 14
Demolition or rotary hammers   10 - 21 18
Plate compactors Non-vibration reduced 9 - 22 18
Plate compactors Vibration reduced 2 - 7 4
Pneumatic hammers   10 - 29 25
Saws - Cut-off Masonry cutting 5 - 14 13
Scabblers   4 - 14 12
Water jetting guns   1 - 5 4
Brushcutters Saw head 3 - 5 5
Brushcutter & Strimmers Strimmer head 2 - 7 7
Chainsaws   3 - 7 7
Hedge trimmers   3 - 14 7
Mowers - Hand-guided   3 - 8 6
Mowers - ride on   3 - 6 5
Chipping hammers Chipping weld 20 - 32 31
Chipping hammers Chipping stone, concrete, rust 11 - 22 20
Impact wrenches Drive size: 3/8, 1/2 & 3/4" 3 - 6 5
Impact wrenches Drive size: 1" 7 - 11 10
Pedestal grinders   2 - 11 8
Polishers - angle (hand-held) Mop head or soft-backed pad 1 - 3 3
Rock drills   10 - 28 26
Stone hammers   7 - 22 18
Jigsaws 9 - 17 11
Routers   2 - 3 3
Staplers   2 - 6 4

You also need to check, by observing them, how long employees are actually exposed to the vibration (such as the total daily 'trigger time' with the equipment operating and in contact with the employee's hand(s)).

Employees are unlikely to be able to provide this information very accurately themselves. You could observe and measure the trigger time over, for example, half an hour and then use the result to estimate the trigger time for the full shift.

Alternatively, where the work task is repetitive, for example drilling large numbers of holes in masonry, you could measure the trigger time when drilling several holes and multiply the average by the number of holes typically drilled in a shift.

If the employee is exposed to vibration from more than one tool or work process during a typical day, you will need to collect information on likely vibration level and 'trigger time' for each one.

Once you have collected relevant vibration data and exposure times you will need to use an exposure calculator[64] to assess each employee's daily exposure

Alternatively, you can use the simple 'exposure points' system in Table 1 to estimate the daily exposure.

Table 2 Simple 'exposure points' system

Tool vibration (m/s2) 3 4 5 6 7 10 12 15
Points per hour (approximate) 20 30 50 70 100 200 300 450

Multiply the points assigned to the tool vibration by the number of hours of daily 'trigger time' for the tool(s) and then compare the total with the exposure action value (EAV) and exposure limit value (ELV) points.

100 points per day = exposure action value (EAV)
400 points per day = exposure limit value (ELV)

You can read more guidance on monitoring and measuring here[65]

Duties of manufacturers and supplier

How tool and machine manufacturers and suppliers can help

Tool and machine manufacturers are obliged by the Supply of Machinery (Safety) Regulations 2008 (as amended) (on legislation.gov.uk)[66] to design equipment which will reduce vibration risks to as low a level as possible, making use of the latest technology. The equipment should be  appropriately conformity assessment marked to show that it complies with these requirements, and health and safety information should be provided in the user instructions. This should include:

  • warnings about any vibration-related risk from using the equipment
  • information on safe use and, where necessary, training requirements
  • information on how to maintain the equipment
  • a statement of the vibration emission (or a statement that the vibration test has produced a vibration emission of less than 2.5 m/s2) together with information on the test method used

New machinery placed on the market in Great Britian (England, Scotland and Wales) must be UKCA or CE marked, supplied with a declaration of conformity and have instructions in English.

There is more guidance on the regulations and how they apply to machinery being supplied in or into Great Britain and Northern Ireland (on GOV.UK)[67]

For most types of tool, manufacturers use internationally agreed test methods for vibration testing. These allow you to compare the vibration performance of different brands and models of the same type of tool. Unfortunately, many of these test methods do not represent the way tools perform at work and vibration levels in the workplace may be much higher than those in this type of 'laboratory' test.

In some industries, employers' organisations, equipment manufacturers and hire companies have adopted colour-coding systems to mark tools to show which are high, medium and low risk. These 'traffic light' systems are intended to help users manage the use of the tools to control risks from vibration.

In most cases the Supply of Machinery (Safety) Regulations 2008 will not apply to those supplying or hiring out work equipment, but suppliers and equipment hirers will be subject to Section 6 of the Health and Safety at Work etc Act 1974[68].

Equipment should be provided with adequate safety information, including on vibration, normally in the form of the manufacturer's user instructions.

Link URLs in this page

  1. Vibrationhttps://www.hse.gov.uk/vIBRAtIon/index.htm
  2. Hand arm vibrationhttps://www.hse.gov.uk/vIBRAtIon/hav/index.htm
  3. About this websitehttps://www.hse.gov.uk/vIBRAtIon/hav/about.htm
  4. Key messageshttps://www.hse.gov.uk/vIBRAtIon/hav/keymessages.htm
  5. Worried about your handshttps://www.hse.gov.uk/vIBRAtIon/hav/yourhands.htm
  6. Overview - Advice for employershttps://www.hse.gov.uk/vIBRAtIon/hav/advicetoemployers/index.htm
  7. Employers responsibilitieshttps://www.hse.gov.uk/vIBRAtIon/hav/advicetoemployers/responsibilities.htm
  8. Assess riskhttps://www.hse.gov.uk/vIBRAtIon/hav/advicetoemployers/assessrisks.htm
  9. Overview - How to protect workershttps://www.hse.gov.uk/vIBRAtIon/hav/advicetoemployers/protect.htm
  10. Control riskhttps://www.hse.gov.uk/vIBRAtIon/hav/advicetoemployers/controlrisks.htm
  11. Information and traininghttps://www.hse.gov.uk/vIBRAtIon/hav/advicetoemployers/information.htm
  12. Health surveillancehttps://www.hse.gov.uk/vIBRAtIon/hav/advicetoemployers/healthsurveillance.htm
  13. Overview - Good practicehttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/index.htm
  14. Overview - Foundrieshttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/foundries/index.htm
  15. Eliminate fettling by improving casting qualityhttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/foundries/fettlingelimination.htm
  16. Machining as a substitute for fettlinghttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/foundries/machining.htm
  17. Automatic fettlinghttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/foundries/automaticfettling.htm
  18. Jig-mounting of grindershttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/foundries/jigmounting.htm
  19. Semi-automatic cut off machinehttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/foundries/cutoffmachine.htm
  20. Isolated casting cut offhttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/foundries/isolatedcasting.htm
  21. Installation of hydraulic cropping machinehttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/foundries/hydrauliccropping.htm
  22. Shell knockout 1https://www.hse.gov.uk/vIBRAtIon/hav/campaign/foundries/castingshell.htm
  23. Shell knockout 2https://www.hse.gov.uk/vIBRAtIon/hav/campaign/foundries/contactcastingshell.htm
  24. Hydraulic pushouthttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/foundries/furnaceliningremoval.htm
  25. Ladle slag chippinghttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/foundries/chippingslag.htm
  26. Overview - Constructionhttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/construction/index.htm
  27. Preparing a code of practicehttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/construction/tunnelling.htm
  28. Construction Industry Council guidancehttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/construction/cicguidance.htm
  29. Mounted breakerhttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/construction/mountedroadbreaker.htm
  30. Directional drillinghttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/construction/directionaldrilling.htm
  31. Crushing concretehttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/construction/crushingconcrete.htm
  32. Bursting concretehttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/construction/burstingconcrete.htm
  33. Diamond wire cuttinghttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/construction/diamondwire.htm
  34. Water jettinghttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/construction/waterjetting.htm
  35. Codes of Practice from the Water Jetting Associationhttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/construction/codeofpractice.htm
  36. Grit blastinghttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/construction/gritblasting.htm
  37. Paint-on retarderhttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/construction/paintonmaterial.htm
  38. Special formworkhttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/construction/specialformwork.htm
  39. Overview - Steel fabricationhttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/fabrication/index.htm
  40. Machininghttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/fabrication/cncmachining.htm
  41. Laser cuttinghttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/fabrication/lasercutter.htm
  42. Plasma cuttinghttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/fabrication/plasmacutting.htm
  43. Noise reduction in the ship repair industry – research report 1992https://www.hse.gov.uk/vIBRAtIon/hav/campaign/fabrication/noisereduction.htm
  44. Abrasive blastershttps://www.hse.gov.uk/vIBRAtIon/hav/campaign/fabrication/abrasiveblasters.htm
  45. Overview - Regulationshttps://www.hse.gov.uk/vIBRAtIon/hav/regulations.htm
  46. Inspector briefinghttps://www.hse.gov.uk/vIBRAtIon/hav/inspectorbriefing.htm
  47. Overview - Resourceshttps://www.hse.gov.uk/vIBRAtIon/hav/information.htm
  48. Publicationshttps://www.hse.gov.uk/vIBRAtIon/hav/publications.htm
  49. Researchhttps://www.hse.gov.uk/vIBRAtIon/hav/research.htm
  50. Statisticshttps://www.hse.gov.uk/vIBRAtIon/hav/statistics.htm
  51. Useful linkshttps://www.hse.gov.uk/vIBRAtIon/hav/links.htm
  52. Vibration calculatorhttps://www.hse.gov.uk/vIBRAtIon/hav/calculator-guide.htm
  53. Overview - Case studieshttps://www.hse.gov.uk/vIBRAtIon/hav/casestudies/index.htm
  54. (HAVS) in two motor companieshttps://www.hse.gov.uk/vIBRAtIon/hav/casestudies/enforceex.htm
  55. Monitoring exposure to Hand-Arm Vibrationhttps://www.hse.gov.uk/vIBRAtIon/hav/casestudies/mhav-carlwest.htm
  56. Overview - Supply project eventshttps://www.hse.gov.uk/vIBRAtIon/hav/project-events.htm
  57. Controlling vibrationhttps://www.hse.gov.uk/vIBRAtIon/hav/controlling-vibration.htm
  58. Q & A on hand toolshttps://www.hse.gov.uk/vIBRAtIon/hav/hand-tools-qa.htm
  59. Q & A on using a vibration consultanthttps://www.hse.gov.uk/vIBRAtIon/hav/qa-consultant.htm
  60. Q & A on health surveillancehttps://www.hse.gov.uk/vIBRAtIon/hav/qa-surveillance.htm
  61. You can find a definition on what reasonably practicable means herehttps://www.hse.gov.uk/simple-health-safety/risk/steps-needed-to-manage-risk.htm#reasonably-practicable
  62. 'Do you have a vibration problem at work?'https://www.hse.gov.uk/vIBRAtIon/hav/advicetoemployers/index.htm#problem
  63. visit HSE's guidance on controlling the riskshttps://www.hse.gov.uk/vIBRAtIon/hav/advicetoemployers/controlrisks.htm
  64. exposure calculatorhttps://www.hse.gov.uk/vIBRAtIon/hav/calculator-guide.htm
  65. You can read more guidance on monitoring and measuring herehttps://www.hse.gov.uk/vIBRAtIon/hav/advicetoemployers/measurement-monitoring.htm
  66. Supply of Machinery (Safety) Regulations 2008 (as amended) (on legislation.gov.uk)https://www.legislation.gov.uk/uksi/2008/1597/contents/made
  67. guidance on the regulations and how they apply to machinery being supplied in or into Great Britain and Northern Ireland (on GOV.UK)https://www.gov.uk/government/publications/supply-of-machinery-safety-regulations-2008
  68. Section 6 of the Health and Safety at Work etc Act 1974https://www.hse.gov.uk/work-equipment-machinery/uk-law-design-supply-products.htm#sec6hswa74
  69. Publicationshttps://www.hse.gov.uk/vIBRAtIon/hav/publications.htm
  70. Vibration calculatorhttps://www.hse.gov.uk/vIBRAtIon/hav/calculator-guide.htm
  71. Regulationshttps://www.hse.gov.uk/vIBRAtIon/hav/regulations.htm
  72. How to protect employeeshttps://www.hse.gov.uk/vIBRAtIon/hav/advicetoemployers/protect.htm

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2024-10-24