The Control Of Vibration at Work - Managers Guidance

HAV Points Ready Reckoner

40 / 801
30 / 450 / 901 / 1351
25 / 313 / 626 / 938 / 1251
20 / 200 / 400 / 600 / 801 / 1201
V / 19 / 181 / 361 / 542 / 723 / 1084 / 1445
i / 18 / 162 / 324 / 486 / 649 / 973 / 1297
b / 17 / 145 / 289 / 434 / 578 / 868 / 1157 / 1446
r / 16 / 128 / 256 / 384 / 512 / 769 / 1025 / 1281
a / 15 / 113 / 225 / 338 / 450 / 676 / 901 / 1126 / 1351
t / 14 / 98 / 196 / 294 / 392 / 588 / 785 / 981 / 1177 / 1373
i / 13 / 85 / 169 / 254 / 338 / 507 / 677 / 846 / 1015 / 1184 / 1350
o / 12 / 72 / 144 / 216 / 288 / 432 / 576 / 721 / 865 / 1009 / 1153 / 1297 / 1441
n / 11 / 61 / 120 / 182 / 242 / 363 / 484 / 605 / 725 / 848 / 969 / 1090 / 1211 / 1332 / 1450
10.5 / 55 / 110 / 166 / 221 / 331 / 441 / 552 / 662 / 772 / 883 / 993 / 1103 / 1214 / 1324 / 1434
10 / 50 / 100 / 150 / 200 / 300 / 400 / 500 / 600 / 700 / 800 / 900 / 1000 / 1100 / 1200 / 1300 / 1400
9.5 / 45 / 90 / 135 / 181 / 271 / 361 / 452 / 542 / 632 / 723 / 813 / 903 / 994 / 1084 / 1147 / 1265 / 1355 / 1445
M / 9 / 41 / 81 / 122 / 162 / 243 / 324 / 405 / 486 / 567 / 649 / 730 / 811 / 892 / 973 / 1054 / 1135 / 1216 / 1297
a / 8.5 / 36 / 72 / 108 / 145 / 217 / 289 / 362 / 434 / 506 / 578 / 651 / 723 / 795 / 868 / 940 / 1012 / 1087 / 1157 / 1446
g / 8 / 32 / 64 / 96 / 130 / 192 / 256 / 320 / 384 / 448 / 512 / 576 / 641 / 705 / 769 / 833 / 897 / 961 / 1025 / 1281
n / 7.5 / 28 / 56 / 84 / 113 / 169 / 225 / 281 / 338 / 394 / 450 / 507 / 563 / 619 / 676 / 732 / 788 / 844 / 901 / 1126
i / 7 / 25 / 49 / 75 / 98 / 147 / 196 / 245 / 294 / 343 / 392 / 441 / 490 / 539 / 588 / 638 / 637 / 736 / 785 / 981
t / 6.5 / 21 / 42 / 63 / 85 / 127 / 169 / 211 / 254 / 296 / 338 / 381 / 423 / 465 / 507 / 550 / 592 / 634 / 677 / 846
u / 6 / 18 / 36 / 54 / 72 / 108 / 144 / 180 / 216 / 252 / 288 / 324 / 360 / 396 / 432 / 468 / 504 / 540 / 576 / 723
d / 5.5 / 15 / 30 / 45 / 61 / 91 / 121 / 151 / 182 / 212 / 242 / 272 / 303 / 333 / 363 / 394 / 424 / 454 / 484 / 605
e / 5 / 13 / 25 / 38 / 50 / 75 / 100 / 125 / 150 / 175 / 200 / 225 / 250 / 275 / 300 / 325 / 350 / 375 / 400 / 500
4.5 / 10 / 20 / 30 / 41 / 61 / 81 / 101 / 122 / 142 / 162 / 182 / 203 / 223 / 243 / 263 / 284 / 304 / 324 / 405
m/s2 / 4 / 8 / 16 / 24 / 32 / 48 / 64 / 80 / 96 / 112 / 128 / 144 / 160 / 176 / 192 / 208 / 224 / 240 / 256 / 320
3.5 / 6 / 12 / 18 / 25 / 37 / 49 / 61 / 74 / 86 / 98 / 110 / 123 / 135 / 147 / 159 / 172 / 184 / 196 / 245
3 / 5 / 9 / 14 / 18 / 27 / 36 / 45 / 54 / 63 / 72 / 81 / 90 / 99 / 108 / 117 / 126 / 135 / 144 / 180
2.5 / 3 / 6 / 9 / 12 / 18 / 25 / 31 / 38 / 44 / 50 / 56 / 63 / 69 / 75 / 81 / 88 / 94 / 100 / 125
15 m / 30 m / 45 m / 1 h / 1.5h / 2 h / 2.5 h / 3 h / 3.5 h / 4 h / 4 .5h / 5 h / 5 .5 h / 6 h / 6.5h / 7 h / 7.5h / 8 h / 10 h
Time (Hours/Minutes)

Use the Ready Reckoner to manage and plan your tool usage at the start of the day to ensure that your Exposure Limit Value will not be exceeded. It is too late to identify that you are exceeding the 400 points Exposure Limit Value before the end of your working day.

Control of Vibration At WorkManagers Guidance 11 May 2011 V21

The Control Of Vibration at Work - Managers Guidance

Using the ready reckoner

Above Limit Value
Likely to be above Limit Value
Above Acton Value
Likely to be above Action Value
Below Action Value
  1. Find the vibration magnitude (level) for the tool [printed on the HAV plant label] (or the nearest value) on the grey scale on the left of the table.
  2. Find the exposure ‘trigger’ time (or the nearest value) on the grey scale across the bottom of the table.
  3. Find the value in the table that lines up with the magnitude and time.
  4. Compare the points value with the Exposure Action Value (100 points) and Exposure Limit Value (400 points).
  1. If you are exposed to more than one tool or process during the day, repeat steps 1 – 3 for each one, add the points and compare the total with the exposure action and limit values.

Key Messages

  • HAVS is preventable, but once the damage is done it is permanent.
  • HAVS is serious and disabling, and nearly 2 million people are at risk.
  • Damage from HAVS can include the inability to do fine work and cold can trigger painful finger blanching attacks.
  • The costs to employees and to employers of inaction could be high.
  • There are simple and cost-effective ways to eliminate risk of HAVS.
  • The Control of Vibration at Work Regulations focus on the elimination or control of vibration exposure.
  • The long-term aim is to prevent new cases of HAVS occuring and enable workers to remain at work without disability.
  • The most efficient and effective way of controlling exposure to hand-arm vibration is to look for new or alternative work methods which eliminate or reduce exposure to vibration.
  • Health surveillance is vital to detect and respond to early signs of damage.

Control of Vibration At WorkManagers Guidance 11 May 2011 V21