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Appendix B: Heat Exposure Tables
23
Appendix B: Heat Exposure Tables
ACGIH
Screening Criteria for Heat Stress Exposure. WBGT values in °C. NOTE: according
to the ACGIH’s guidelines, the temperature values represent a work and rest process
which is explained in the standards. Please refer to the ACGIH TLVs and BEIs for
specific details.
Work and recovery
(TLV )
Light
Moderate
Heavy
Very Heavy
75% to 100%
31.0
28.0
26.0*
23.5*
50% to 75%
31.0
29.0
27.5
25.5*
25% to 50%
32.0
30.0
29.0
28.0
0% to 25%
32.5
31.5
30.5
30.0
Work and recovery
(Action Limit)
Light
Moderate
Heavy
Very Heavy
75% to 100%
28.0
25.0
22.5*
20.0*
50% to 75%
28.5
26.0
24.0
22.5*
25% to 50%
29.5
27.0
25.5
24.5
0% to 25%
30.0
29.0
28.0
27.0
*Values not specified by ACGIH have been estimated for continuity.
Cited from American Conference of Governmental Industrial Hygienists, Threshold Limit
Values and Biological Exposure Indices for 2008. Reprinted with permission.
Appendix B