Ability of the ISO predicted heat strain method to predict a limiting heat stress exposure.

Details

• Personal Author:
  Prieto E
• Description:
  Heat stress is one of many physical agents to which thousands of workers are under constant exposure. Oftentimes it is necessary to work above the WBGT-based heat stress exposure limits. It is therefore important to consider alternative measures that include an exposure time limit to manage the heat stress. Predicted Heat Strain (PHS) (ISO7933) is one of those alternatives. PHS uses both personal factors like height and weight and job factors of environment, metabolic rate and clothing. The purpose of this project is to determine whether the PHS is an adequate method to predict short term exposure limits. The project's data were taken from a prior experimental study where twelve participants were exposed to five different heat stress levels while over three different clothing ensembles. A total of 15 combinations of clothing and environment were tried. The PHS process was adapted to an Excel function using Visual Basic for Applications (VBA) (called fPHSTre). fPHSTre predicted a rectal temperature (Tre) at the exposure limit using both personal and job factors and then using standard values for personal factors. Based on analysis of variance, the fPHSTre adequately accounted for clothing, specifically evaporative resistance, using either fixed or individual data for predicted Tre on the experimental trials. In general, the PHS model could be used to reliably assess time limiting safe exposures in occupational settings for workers in hot environments. [Description provided by NIOSH]
• Subjects:
  Environmental Exposure Heat Stress Disorders Hot Temperature Men Occupational Health Risk Assessment Risk Factors Safety Women Workplace
• Keywords:
  Author Keywords: Heat Stress; Heat Strain; Predicted Heat Strain; PHS Heat; Heat Stress; Heat Exposure; Exposure Levels; Risk Factors; Workers; Work Environment; Physiological Stress; Physiological Effects; Health Effects; Metabolic Rate; Clothing; Humans; Men; Women; Temperature Measurement; Worker Safety; Worker Health;
• Publisher:
  University of South Florida
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Thesis
• Place as Subject:
  Florida ; OSHA Region 4
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-23
• NIOSHTIC Number:
  nn:20065657
• Citation:
  Tampa, FL: University of South Florida, 2018 Jun; :1-23
• Email:
  EPRIETO6729@HOTMAIL.COM
• Federal Fiscal Year:
  2018
• Performing Organization:
  Sunshine Education and Research Center, University of South Florida
• Peer Reviewed:
  False
• Start Date:
  20050701
• Source Full Name:
  Ability of the ISO predicted heat strain method to predict a limiting heat stress exposure
• End Date:
  20290630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:fe4c6880cbd5469353dbe6e22848c58cc5f285caa0bae3bd90aaa8938dd83ff00f88ef4e22c7eaac3e8e48656847c63904b4a7d811d49dda647681b6406fbc17
• Download URL:
  https://stacks.cdc.gov/view/cdc/248551/cdc_248551_DS1.pdf
• File Type:
  [PDF - 524.63 KB ]