+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

WBGT clothing adjustment factors for four clothing ensembles and the effects of metabolic demands

WBGT clothing adjustment factors for four clothing ensembles and the effects of metabolic demands

Journal of Occupational and Environmental Hygiene 5(1): 1-5; Quiz D21-3

This study measured the clothing adjustment factors (CAFs) for four clothing ensembles (Cotton Coveralls, Tyvek 1427 Coveralls, NexGen Coveralls, and Tychem QC Coveralls; all coveralls were worn without hoods) against a baseline of cotton work clothes to determine whether the CAFs would be affected by the metabolic rate. Fifteen participants wore one of the five ensembles while walking on a treadmill at low, moderate, and high rates of work in an environment maintained at 50% relative humidity. A climatic chamber was used to slowly increase the level of heat stress by increasing air temperature. When the participant's core temperature reached a steady-state, the dry bulb temperature was increased. The point at which the core temperature began to increase was defined as the inflection point, and the WBGT recorded 5 min before the inflection point was the critical WBGT for each ensemble. A three-way mixed effects linear model with ensemble by metabolic rate category interactions demonstrated that the CAF did not change with metabolic rate, so CAFs can be used over a wide range of metabolic rates. The data at the moderate metabolic rate were combined with data on 14 participants from a previous study under the same conditions. The CAFs in degrees C WBGT were 0 for cotton coveralls, 1.0 for Tyvek 1422A, and 2.5 for NexGen. Although the value of 7.5 for Tychem QC was found, the recommendation remained at 10 to account for the effects of humidity. The standard error for the determination of WBGT crit at 50% relative humidity was 1.60 degrees C WBGT.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 022091969

Download citation: RISBibTeXText

PMID: 17999329

DOI: 10.1080/15459620701732355

Related references

WBGT clothing adjustments for four clothing ensembles under three relative humidity levels. Journal of Occupational and Environmental Hygiene 2(5): 251-256, 2005

Effects of Hoods and Flame-Retardant Fabrics on WBGT Clothing Adjustment Factors. Journal of Occupational and Environmental Hygiene 5(1): 59-62, 2008

Continuing the search for WBGT clothing adjustment factors. Applied Occupational and Environmental Hygiene 14(2): 119-125, 1999

Effects of gender on TLV clothing adjustment factors for five ensembles. Medicine & Science in Sports & Exercise 34(5 Suppl.): S194, 2002

Heat strain at the critical WBGT and the effects of gender, clothing and metabolic rate. International Journal of Industrial Ergonomics 38(7-8): 640-644, 2008

Prediction of WBGT-based clothing adjustment values from evaporative resistance. Industrial Health 55(6): 549-554, 2017

Thermal insulation and clothing area factors of typical Arabian Gulf clothing ensembles for males and females: measurements using thermal manikins. Applied Ergonomics 39(3): 407-414, 2008

Clothing in the self-system of adolescents: relationships among values, proximity of clothing to self, clothing interest, anticipated outcomes and perceived quality of life. Research report from the Michigan State University Agricultural Experiment Station East Lansing: 97 (556), 1997

Wbgt adjustments for protective clothing. American Industrial Hygiene Association Journal 48(9): A-576-A-577, 1987

On the electric charge of clothing and the body due to the friction between the clothing or the clothing and the skin. Nihon Seirigaku Zasshi. Journal of the Physiological Society of Japan 31(11): 653-662, 1969

Clothing interests and clothing aspirations associated with selected social-psychological factors for a group of college women in Korea. 1971

Physiological responses in protective clothing to two hot environments at equivalent WBGT levels. Medicine & Science in Sports & Exercise 34(5 Suppl.): S225, 2002

Effects of two different clothing ensembles on endurance performance of handgrip exercise. Applied Human Science 14(5): 248, 1995

Hygienic studies of foundation garments. 1. Effects of subjective observations, clothing climate, and clothing pressure. Nihon Eiseigaku Zasshi. Japanese Journal of Hygiene 25(4): 344-349, 1970

Effects of clothing values on perceived clothing deprivation among adolescents. Perceptual and Motor Skills 71(3 Pt 2): 1191-1199, 1990