1. HAV Review – IOSH South Wales
Jim Maccall
Notes for delegates attending HAV Management Essentials Programme

2. Session Plan HAVS Basics Health Focus Controls / Assessment PPE
Common Pitfalls
Health Surveillance
Notes for delegates attending HAV Management Essentials Programme

3. “I know it like the back of my hand” Complicated bits of kit!
What is HAVS?
“I know it like the back of my hand”
Complicated bits of kit!
Notes for delegates attending HAV Management Essentials Programme

4. What is HAVS?
HAVS – Hand Arm Vibration Syndrome includes more than one condition including:
Vibration White Finger
Carpal Tunnel Syndrome
Notes for delegates attending HAV Management Essentials Programme

5. Vibration White Finger (VWF)
Symptoms –
Permanent loss of feeling in their fingers
Blanching of finger
Long-term damage can lead to Gangrene
Notes for delegates attending HAV Management Essentials Programme

6. Notes for delegates attending HAV Management Essentials Programme

7. Carpal Tunnel Syndrome
Notes for delegates attending HAV Management Essentials Programme

8. Scale of issue? 1997 to 1998 Survey – 288,000 sufferers
Approx. 500 new cases diagnosed per annum
11% of cases are women
High risk activities were extraction i.e. mining
Current high risk industries?
Notes for delegates attending HAV Management Essentials Programme

9. HSE Health Focus UK Fatality rate – 2017 25 work at height deaths
31 struck by moving vehicle
Notes for delegates attending HAV Management Essentials Programme

10. HSE Health Focus
UK Fatality rate – 2017 – fatalities per 100,000 workers
Notes for delegates attending HAV Management Essentials Programme

11. HSE Health Focus Construction
10,000 - premature deaths linked to construction dust
1,000 – mental well-being – Suicide
2,300 per 100,000 workers with Musculoskeletal Disorders
75% of civil claims are for noise induced hearing loss
Notes for delegates attending HAV Management Essentials Programme

12. Managing the Risk Risk Assessing is simply done: Look at the whole job
How many workers
What kit is being used
Get reliable vibration data
Add K = Uncertainty if using manufacturers data
Measure trigger time
Notes for delegates attending HAV Management Essentials Programme

13. http://www.thetooladvisor.com/ Getting Reliable Data
Notes for delegates attending HAV Management Essentials Programme

14. Typical Vibration Values and Trigger Times
Tool type
Dose
Time to 100 Points
Time to 400 Points
Road breaker – Air – 25kg
3.6
03h 51m
15h 26m
Stihl Saw – TS410
3.9
03h 17m
13h 09m
Stihl Saw – TS400
6.8
01h 05m
04h 20m
Air Orbital Sander – Mirka - New
Air Orbital Sander – Mirka – Old 9
00h 37m
02h 28m
Battery Orbital Sander - Makita
5.5
01h 39m
06h 37m
Makita ½” drive Impact Wrench
16.5
00h 11m
00h 44m
Recip Saw – Old Style - Makita 22
00h 06m
00h 25m
Multisaw - Fein
11.9
00h 21m
01h 25m
values in m/s2 (Metres Per Second Squared)
Notes for delegates attending HAV Management Essentials Programme

15. Exposure Action Value EAV EAV is 2.5m/s2 A(8) or 100 Exposure Points
If employees are exposed to vibration above this value then action must be taken to reduce exposure
EAV is 2.5m/s2 A(8) or 100 Exposure Points
A(8) = average over 8 working hours
Actions are based on your Risk Assessment

16. Exposure Limit Value ELV A(8) = average over 8 working hours
Employees must not be exposed to vibration above this value
ELV is 5m/s2 A(8) or 400 Exposure Points
A(8) = average over 8 working hours
Lots of equipment and operations are likely to expose workers to a vibration dose above and beyond the Limit Value

17. Measuring Trigger Time
You could use:
A best guess!
A stop watch - operated by 2nd person
A timer linked to the power source
A timer activated by vibration that also monitors points e.g. The HAVi
A vibration management system e.g. HAVMETER from Reactec
Notes for delegates attending HAV Management Essentials Programme

18. So how does HAVi work on site?
Retrofitted to any tool
Vibration magnitude
Colour coded
Flashing Light
HSE points
Heavy Duty
Operated remotely
Trigger time
Notes for delegates attending HAV Management Essentials Programme

19. Personal Protective Equipment
Can PPE help?
Can Anti Vibration gloves help?
6.3 to 200 Hz
Gloves??
Notes for delegates attending HAV Management Essentials Programme

20. Common Pitfalls Putting it in a box Estimating trigger time
Doubling the m/s2 provided by the manufacturer
Notes for delegates attending HAV Management Essentials Programme

21. Manufacturer declared magnitude of 5.4 m/s2 Equation time!
Maths
Manufacturer declared magnitude of 5.4 m/s2
Equation time!
HSE Vibration Points per hour
Points = n(1 hour) = 2 x (ahv)2
In other words:
(magnitude x magnitude) x 2
k – Uncertainty 2.7 m/s2
Notes for delegates attending HAV Management Essentials Programme

22. Maths
(5.4 x 5.4) x 2 = Points per hour K = 2.7 add this to the declared value = (8.1 x 8.1) x 2 = points per hour! So adding the K allows for the worst case and still doubles the manufacturers value
Notes for delegates attending HAV Management Essentials Programme

23. Common Pitfalls Putting it in a box Estimating trigger time
Doubling the m/s2 provided by the manufacturer
Using 5m/s2A(8) / 400 vibration points as a target rather than a limit
Poor health surveillance / work history questionnaires
Ignoring 10% of women and 5% of men who may have Raynauds Primary!
Notes for delegates attending HAV Management Essentials Programme

24. Health Surveillance
Notes for delegates attending HAV Management Essentials Programme

25. Conclusion Remember HAVS has no cure but its progress can be halted
Its now easier to prevent than ever
Job risk assessment should aim to keep exposure below 100 points per person
Legal limit is 400 points in 1 shift – for emergencies!
HAVi is a simple essential piece of PPE
HAVi offer consultancy, 1 day IOSH HAV ME and short duration courses for supervisors and operatives
Notes for delegates attending HAV Management Essentials Programme

26. Self-Promotion Warning

27. Training for Hire have moved to the Trainers Arms