# The Control of Vibration at Work Regulations (Northern Ireland) 2005, Part II: exposure to vibration averaged over one week


The exposure to vibration averaged over one week (A(8)week) is the total exposure occurring within a period of seven consecutive days, normalised to a reference duration of five 8-hour days (40 hours). It is ascertained using the formula:
A ( 8 ) week = 1 5 ∑ j = 1 7 A ( 8 ) j 2 where:
A(8)j is the daily exposure for day j.
The exposure to vibration averaged over one week is for use only for the purposes of regulation 6(5).

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Source: https://www.legislation.gov.uk/nisr/2005/397/schedule/2/part/II (the official version)
Page: https://openlegislation.uk/control-of-vibration-at-work-regulations-northern-ireland-2005/schedule-2/part-II
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.