Appendix B
ACGIH Clothing Corrections
24
The following clothing corrections are in degrees Celsius. When a clothing correction
is entered into the setup portion of the QUESTemp 48N, 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 permission
from ACGIH
Physiological Heat Exposure Limits (PHELs) 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