15
12. APPENDIX A : HEAT EXPOSURE TABLES
ACGIH
Screening Criteria for Heat Stress Exposure. WBGT values in
°
C (
°
F).
Acclimatized
Work
Very
Demands Light Moderate Heavy Heavy
100%
Work
29.5
27.5
26.0
(85.1) (81.5) (78.8)
75% Work;
30.5
28.5
27.5
25% Rest
(86.9)
(83.3)
(81.5)
50%
Work;
31.5
29.5
28.5
27.5
50% Rest
(88.7)
(85.1)
(83.3)
(81.5)
25%
Work;
32.5
31.0
30.0
29.5
75% Rest
(90.5)
(87.8)
(86.0)
(85.1)
Unacclimatized
Work
Very
Demands Light Moderate Heavy Heavy
100%
Work
27.5
25.0
22.5
(81.5) (77.0) (72.5)
75%
Work;
29.0
26.5
24.5
25% Rest
(84.2)
(79.7)
(76.1)
50%
Work;
30.0
28.0
26.5
25.0
50% Rest
(86.0)
(82.4)
(79.7)
(77.0)
25%
Work;
31.0
29.0
28.0
26.5
75% Rest
(87.8)
(84.2)
(82.4)
(79.7)
from "American Conference of Governmental Industrial Hygienists - Threshold
Limit Values and Biological Exposure Indices for 2001"
Reprinted with permission from ACGIH
