Skip to Main Content
Effects of ventilated safety helmets in a hot environmentAuthor(s): G.A. Davis; E.D. Edmisten; R.E. Thomas; R.B. Rummer; D.D. Pascoe
Source: International Journal of Industrial Ergonomics, Vol. 27: 321â€“329
Publication Series: Miscellaneous Publication
PDF: View PDF (145 KB)
DescriptionForest workers are likely to remove head protection in hot and humid conditions because of thermal discomfort. However, a recent Occupational Safety and Health Administration (OSHA) regulation revision requires all workers in logging operations to wear safety helmets, thus creating a compliance problem. To determine which factors contribute to forest workersâ€™ thermal discomfort, this study evaluated subjectsâ€™ physiological and psychophysical responses during tasks approximating the workload of forest workers in a high-temperature environment similar to that found in the southeastern United States during the summer. Environmental conditions in the helmet dome space were also evaluated. Three helmets were used in this study: a standard helmet, a passively ventilated helmet, and an actively ventilated helmet. It was found that none of the tested helmets burdened the body significantly for the physiological variables that were examined. Evaluation of the dome space environmental conditions showed that both the dry-bulb temperature (DBT) and wet-bulb temperature (WBT) varied significantly among the helmets tested. Psychophysical results showed that ventilation contributes to greater helmet comfort, and that weight and fit are important factors in helmet design.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationDavis, G.A.; Edmisten, E.D.; Thomas, R.E.; Rummer, R.B.; Pascoe, D.D. 2001. Effects of ventilated safety helmets in a hot environment. International Journal of Industrial Ergonomics, Vol. 27: 321â€“329
KeywordsHead protection, Heat stress, Personal protective equipment, Protective headwear, Safety helmet, Ventilation
- Human thermal comfort in urban outdoor spaces
- Race, class, gender, and American environmentalism.
- Working safely in summertime heat
XML: View XML