ERGONOMICS OF MANUAL MATERIALS HANDLING - Environmentally Conscious Materials Handling - page 50

Ta b l e 2 . 1 1 Frequency Multiplier

FLifts/min Duration

< 1 hour 1-2 hours 2-8 hours
V< 30 in V > 30 in V< 30 in V > 30 in V< 30 in V > 30 in

< 0.2 1.00 1.00 0.95 0.95 0.85 0.85

0.5 0.97 0.97 0.92 0.92 0.81 0.81

1 0.94 0.94 0.88 0.88 0.75 0.75

2 0.91 0.91 0.84 0.84 0.65 0.65

3 0.88 0.88 0.79 0.79 0.55 0.55

4 0.84 0.84 0.72 0.72 0.45 0.45

5 0.80 0.80 0.60 0.60 0.35 0.35

6 0.75 0.75 0.50 0.50 0.27 0.27

7 0.70 0.70 0.42 0.42 0.22 0.22

8 0.60 0.60 0.35 0.35 0.18 0.18

9 0.52 0.52 0.30 0.30 0.00 0.15

10 0.45 0.45 0.26 0.26 0.00 0.13

11 0.41 0.41 0.00 0.23 0.00 0.00

12 0.37 0.37 0.00 0.21 0.00 0.00

13 0.00 0.34 0.00 0.00 0.00 0.00

14 0.00 0.31 0.00 0.00 0.00 0.00

15 0.00 0.28 0.00 0.00 0.00 0.00

> 15

0.00 0.00 0.00 0.00 0.00 0.00

Ta b l e 2 . 1 2 Coupling Multiplier
Coupling Type CM

V< 30 in. V > 30 in.

Good 1.00 1.00

Fair 0.95 1.00

Poor 0.90 0.90