TSI Instruments questemp 48n

Appendix B
ACGIH
25
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. 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.
Appendix B:
Heat Exposure
Tables