Key Data

Hand-arm vibration ready reckoner

  • The table below is a “ready reckoner” for calculating daily vibration exposures. All you need is the vibration magnitude (level) of the equipment being used and the length of time it is being used for (exposure time). The ready reckoner covers a range of vibration magnitudes up to 40m/s² and a range of exposure times up to ten hours. The exposures for different combinations of vibration magnitude and exposure times are given in exposure points instead of values in m/s² A(8). You may find the exposure points easier to work with than the A(8) values:
    • exposure points change simply with time: twice the exposure time, twice the number of points
    • exposure points can be added together, for exam...