Appendix B: Heat Exposure Tables
24
ACGIH Clothing Corrections

The following clothing corrections are in degrees Celsius. When a clothing correction is

entered into the setup portion of the QUESTemp° 36, the value is added to the WBGT

only for looking up the stay times. The WBGT value displayed by the unit does not

reflect corrections.

Clothing type

Clothing correction (Addition to WBGT (ºC)

Work clothes (long sleeve shirt and pants)

0º

Cloth (woven material) coveralls

0º

Double-layer woven clothing

3º

SMS polypropylene coveralls

0.5º

Polyolefin coveralls

1º

Limited-use vapor-barrier coveralls

11º

Cited from American Conference of Governmental Industrial Hygienists, Threshold Limit

Values and Biological Exposure Indices for 2008. Reprinted with permiss ion.

United States Navy

Physiological Heat Exposure Limits (PHEL) Time Table

(Without the presence of fuel combustion gases/fuel vapors)

The recommended working hours are shown based on a maximum of eight hours.

Naval personnel will follow a category, I - VI, based upon their function.

PHEL Curves (Total Exposure Time in Hours: Minutes)

WBGT(F)
I
II
III
IV
V
VI
80.0
>8:00
>8:00
>8:00
8:00
6:35
4:30
81.0
>8:00
>8:00
>8:00
8:00
6:35
4:30
82.0
>8:00
>8:00
8:00
7:05
5:25
3:40
83.0
>8:00
8:00
7:45
6:25
4:55
3:20
84.0
>8:00
8:00
7:05
5:55
4:30
3:05
85.0
8:00
7:45
6:30
5:20
4:05
2:50
86.0
8:00
7:05
5:55
4:55
3:45
2:35
87.0
7:25
6:30
5:25
4:30
3:25
2:20
88.0
6:45
5:55
4:55
4:05
3:10
2:10
89.0
6:10
5:25
4:30
3:45
2:50
2:00
90.0
5:40
5:00
4:10
3:25
2:40
1:50
91.0
5:15
4:35
3:50
3:10
2:25
1:40