Table 2.
Whole-body vibration exposures evaluated by weighted, root-mean-square (aw) accelerations for axes x, y, and z, and vector summations for haul truck drivers at four mines/quarries.a
| Quarry | Subject # | Day No. | Total sampling time (min) | A(8) aw X-axis (m/s2) | A(8) aw Y-axis (m/s2) | A(8) aw Z-axis (m/s2) | A(8) aw vector sum (m/s2) | ISO/ANSI 8-hr shift equivalent HGCZ dominant axis | EUGPG 8-hr shift equivalent HGCZ dominant axis |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 501 | 0.44 | 0.35 | 0.61 | 1.00 | Within | Within |
| 2 | 2 | 1 | 369 | 0.35 | 0.38 | 0.52 | 0.89 | Within | Within |
| 2 | 245 | 0.34 | 0.42 | 0.49 | 0.90 | Within | Below | ||
| 3 | 3 | 1 | 356 | 0.23 | 0.23 | 0.35 | 0.57 | Below | Below |
| 2 | 355 | 0.25 | 0.24 | 0.37 | 0.61 | Below | Below | ||
| 1 | 4 | 1 | 478 | 0.28 | 0.24 | 0.47 | 0.70 | Within | Below |
| 2 | 495 | 0.67 | 0.72 | 0.65 | 1.52 | Within | Within | ||
| 5 | 1 | 468 | 0.51 | 0.51 | 0.48 | 1.12 | Within | Within | |
| 1 | 2 | 489 | 5.64 | 0.29 | 0.34 | 7.91 | Above | Above | |
| 4 | 6 | 1 | 368 | 0.25 | 0.20 | 0.31 | 0.54 | Below | Below |
| 2 | 397 | 0.26 | 0.21 | 0.31 | 0.56 | Below | Below | ||
| 7 | 1 | 358 | 0.21 | 0.19 | 0.28 | 0.49 | Below | Below | |
| 2 | 319 | 0.23 | 0.22 | 0.35 | 0.57 | Below | Below |
a
Weighted acceleration levels for the total sample times were normalized to full 8-hr shift equivalent levels to compare with the ISO health guidance caution zone (HGCZ) action and limit boundary level conditions of ISO2631-1 and the European Union Directive 2002/44/EC presented in the European Union good practices guide (EUGPG).