Non binding guide to good practice for implementing Directive

ANNEX D Tools for calculating daily exposuresNon binding guide to good practice for implementing Directive 2002/44/EC (Vibrations at Work)D.1 WEB-BASED TOOLSSome web-based calculators are available thatsimplify the process of doing daily vibration exposurecalculations, e.g.:www.hse.gov.uk/vibration/calculator.htmhttp://vibration.arbetslivsinstitutet.se/eng/wbvcalculator.lassoD.2 DAILY EXPOSURE GRAPHThe graph in Figure D.1 gives a simple alternativemethod for looking up daily exposures or partialvibration exposures without the need for a calculator.Simply look on the graph for the A(8) line at or just abovewhere your vibration magnitude value (kaw)max andexposure time lines meet (the factor k is either 1.4 for thex- and y-axes or 1.0 for the z-axis i.e. vertical direction).The green area in Figure D.1 indicates exposures likelyto below the exposure action value. These exposuresmust not be assumed to be “safe”. There may be a riskof whole-body vibration injury for exposures below theexposure action value, and so some exposures within thegreen area may cause vibration injury in some workers,especially after many years of exposure.D.3 DAILY EXPOSURE NOMOGRAMThe nomogram in Figure D.2 provides a simple alternativemethod of obtaining daily vibration exposures, withoutusing the equations:(a)(b)On the left hand line fi nd the point correspondingto the vibration magnitude (use the left scale forx- and y-axis values; the right scale for z-axisvalues).Draw a line from the point on the left hand line(representing the vibration magnitude) to a pointon the right hand line (representing the exposuretime);Read off the partial exposures where the line crosses thecentral scale.88