Non binding guide to good practice for implementing Directive

D.4 EXPOSURE POINTS SYSTEMWhole-body vibration exposure management can besimplifi ed by using an exposure “points” system. For anyvehicle or machine operated, the number of exposurepoints accumulated in an hour (P E,1hin points per hour)can be obtained from the vibration magnitude a winm/s² and the factor k (either 1.4 for x- and y-axes or 1.0for the z-axis) using:P E,1h= 50(ka w) 2Exposure points are simply added together, so you canset a maximum number of exposure points for any personin one day.The exposure scores corresponding to the exposure actionand limit values are:• exposure action value (0.5 m/s²) = 100 points;• exposure limit value (1.15 m/s²) = 529 points.In general the number of exposure points, P E,is defi ned by:Where aw is the vibration magnitude in m/s², T isthe exposure time in hours and k is the multiplyingfactor of either 1.4 for x- and y-axes or 1.0 forthe z-axis.Alternatively Figure D.3 gives a simple methodfor looking up the exposure pointsThe daily exposure A(8), can be calculatedfrom the exposure point using:FIGURE D.3 EXPOSURE POINTS TABLE (ROUNDED VALUES).2 50 100 200 400 600 800 1000 1200 1600 2000 24001.9 45 90 180 360 540 720 905 1100 1450 1800 2150PART II Guide to good practice on Whole-Body Vibration – ANNEXES A-H1.8 41 81 160 325 485 650 810 970 1300 1600 19501.7 36 72 145 290 435 580 725 865 1150 1450 17501.6 32 64 130 255 385 510 640 770 1000 1300 15501.5 28 56 115 225 340 450 565 675 900 1150 13501.4 25 49 98 195 295 390 490 590 785 980 1200Acceleration x k (m/s 2 )1.3 21 42 85 170 255 340 425 505 675 845 10001.2 18 36 72 145 215 290 360 430 575 720 8651.1 15 30 61 120 180 240 305 365 485 605 7251 13 25 50 100 150 200 250 300 400 500 6000.9 10 20 41 81 120 160 205 245 325 405 4850.8 8 16 32 64 96 130 160 190 255 320 3850.7 6 12 25 49 74 98 125 145 195 245 2950.6 5 9 18 36 54 72 90 110 145 180 2150.5 3 6 13 25 38 50 63 75 100 125 1500.4 2 4 8 16 24 32 40 48 64 80 960.3 1 2 5 9 14 18 23 27 36 45 540.2 1 1 2 4 6 8 10 12 16 20 2415m 30m 1h 2h 3h 4h 5h 6h 8h 10h 12hDaily Exposure time91