Table 1

An example of the vibration job exposure matrix for different time periods and the occupation/job title shrinkage stoping; estimated exposure levels shown are the frequency weighted 8-h equivalent acceleration in m/s2 for hand/arm vibration (HAV) and whole body vibration (WBV) for the respective time period

Time periodConcrete workersDrillingShrinkage stoping
HAVWBVHAVWBVHAVWBV
–1930000.0000
1930–19400026.007.50
1940–19500021.206.30
1950–19600019.81.38.80
1960–19702.105.01.050
1970–19801.803.51.03.71.2
1980–19901.101.40.51.61.6
1990–1.101.40.31.60.7