1. Assessment of exposure
(a) The assessment of the level of exposure to mechanical vibration is based on the calculation of the daily exposure A(8) expressed as equivalent continuous acceleration over an eight-hour period, calculated as the highest (rms) value, determined on three orthogonal axes (1,4awx, 1,4awy, awz for a seated or standing employee), in accordance with Chapters 5, 6 and 7, Annex A and Annex B to ISO Standard 2631-1(1997).
(b) The assessment of the level of exposure may be carried out on the basis of an estimate based on information provided by the manufacturers concerning the level of emission from the work equipment used and based on observation of specific work practices or on measurement.
(c) In the case of maritime shipping, only vibrations exceeding a frequency of 1 Hz need to be considered.
2. Measurement
When measurement is carried out under Regulation 136, the methods used may include sampling which must be representative of the personal
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