Table 6. Comparison of OTM lifting capacity. The one time per 8 hour lifting frequency applied in the Ciriello and Snook (1983) and Snook and Ciriello (1991) is equivalent to the OTM in other researches. The mark “—” in the table indicates “Not applicable”.
| Tasksa | This study (Squat) |
This study (Stoop) |
Lee and Chen (1996) |
Lee et al. (1995) |
Ciriello and Snook (1983) |
Snook and Ciriello (1991) |
|---|---|---|---|---|---|---|
| FK36M FK48M FK31MT1 FK31MT2 FK31MT3 FK31MT4 FK31MT5 FS36M FS48M FS31MT1 FS31MT2 FS31MT3 FS31MT4 FS31MT5 |
— — 30.4 (5.6)b 34.3 (3.7) 33.6 (4.6) 32.2 (4.5) 31.5 (4.9) — — 21.0 (3.1) 25.4 (3.7) 26.5 (4.1) 25.8 (4.3) 24.7 (4.2) |
— — 31.9 (7.7) 34.9 (5.3) 34.7 (6.5) 32.7 (5.0) 30.4 (4.8) — — 21.3 (3.8) 26.5 (4.7) 27.0 (4.5) 25.5 (4.2) 24.8 (3.9) |
41.27 (4.92) 34.92 (3.83) — — — — — 32.63 (3.59) 28.86 (3.98) — — — — — |
40.48 (8.90) — — — — — — 31.96 (4.96) — — — — — — |
61.0 (16.3) — — — — — — — — — — — — — |
44.0 38.0 — — — — — — — — — — — — |
a: There is 5 to 7 digits in the task code. The first two digits represent the lifting height, FK for floor to knuckle and FS for floor to shoulder. The third and fourth digits represent the box width in cm. The fifth digit, M, means the lifting frequency is OTM. And the last two digits represent the lifting duration in this study. T1 means the duration is one second. Similar notations are used for other durations.
b: Standard deviation.