2007, Piran, Slovenia

Measurement methods
humidity. The only exception is a vapour-barrier ensemble, which has clothing adjustments
that depend on the level of humidity. In this case, a protective value in the range is suitable.
Table 3 provides CAFs for the ensembles in the current study plus two others from related
work.
Table 3. Clothing Adjustment Factors (CAF) for Five Clothing Ensembles over Base
Clothing (tee shirt/sports bra, shorts with briefs, socks and shoes)
Ensemble Work Cotton Tyvek NexGen Tychem QC
Clothes Coveralls Coveralls Coverall Coveralls
CAF [°C-WBGT] 0 0 0.7 2.5 10.0
In conclusion, Equations 1 and 2 represent a starting point for using WBGT with adjustments
for clothing and metabolic rate. The protective nature of the limit needs to be further
explored for other metabolic rates.
ACKNOWLEDGMENTS
This research was supported by a grant from the US National Institute for Occupational
Safety and Health (1R01 OH03983); and its contents are solely the responsibility of the
authors and do not necessarily represent the official views of NIOSH or the CDC.
493