Rest Allowances - Fundamentals and Assessment Tools for Occupational Ergonomics - page 753

TABLE 38.4 Posture Allowance
Points Activity

0 Sitting easily

2 Sitting awkwardly or mixed sitting and standing

4 Standing or walking freely

5 Ascending or descending stairs, unladen

6 Standing with a load; walking with a load

8 Climbing up and down ladders; some bending, lifting,

stretching, or throwing

10 Awkward lifting; shoveling ballast to container

12 Constant bending, lifting, stretching, or throwing

16 Coal mining with pickaxes; lying in a low seam

Source: International Labor Office. 1992. Introduction to Work Study,
4th ed. Geneva, Switzerland: ILO. With permission.

38.6.2 Mental Fatigue Allowances
The ILO (1992) has two mental fatigue allowances: concentration

anxiety and monotony.

/

1. Concentration anxiety. Table 38.6 gives allowances for concentration anxiety

/ /

2. Monotony. Table 38.7 gives allowances for monotony

38.6.3 Environmental Fatigue Allowances
The ILO (1992) has four environmental fatigue allowances: climate; dust, dirt, and fumes; noise and
vibration; and eye strain (Konz and Johnson, 2004):

1. Climate. Table 38.8 gives allowances for climate, subdivided into temperature humidity, wet, and

/

humidity, see Konz and Johnson (2004)
2. Dirt, dust, and fumes. Table 38.9 gives allowances for dirt, dust, and fumes
3. Noise and vibration. Table 38.10 gives allowances for noise and vibration. For more on noise and
vibration, see Chapter 31 and Chapter 33
4. Eye strain. Table 38.11 gives allowance for eye strain. For more on eyes, vision, and illumination,
see Konz and Johnson (2004)

ventilation. For more on temperature

/

TABLE 38.5 Restrictive Clothing Allowances

Points Clothing

1 Thin rubber (surgeon's) gloves

2 Household rubber gloves; rubber boots

3 Grinder's goggles

5 Industrial rubber or leather gloves

8 Face mask (e.g., for spray painting)

15 Asbestos suit or tarpaulin coat

20 Restrictive protective clothing and respirator

Notes: ILO (1992) considers clothing effects on dexterity as well as clothing weight
in relation to effort and movement. Also consider whether the clothing affects vision or
breathing.
Source: International Labor Office. 1992. Introduction to Work Study, 4th ed. Geneva,
Switzerland: ILO. With permission.