Industry Heat Exposure (Allowable Limits) Standards

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Industry Heat Exposure (Allowable Limits) Standards Heat Exposure Standards are a set of guidelines to prevent the risk of overheating and heat stress at work spaces. According to the Heat Stress in the Workplace. What You Need to Know as an Employer brochure issued by Health and Safety Executive in August 2003, “Heat stress occurs when the body’s means of controlling its internal temperature starts to fail. As well as air temperature, factors such as work rate, humidity and clothing worn while working may lead to heat stress.” (http://www.hse.gov.uk/pubns/geis1.PDF). The standards are meant to be applied in many workspace situations and industries. Typically, work situations involving high air temperatures, radiant heat sources, high humidity, direct physical contact with hot objects, or strenuous physical activities, in places including: iron and steel factories, ceramic plants, glass products facilities, rubber products factories, electrical utilities (especially boiler rooms), bakeries, food stands, commercial kitchens, chemical plants, mining sites, nuclear power plants… etc., are potentially high for causing heat stress in employees. Moreover, outdoor operations conducted in hot weather, such as construction, refining, and hazardous waste site activities, particularly the ones that require workers to wear semi permeable or impermeable protective clothing are likely to induce heat stress (Occupational Safety & Health Administration, OSHA Technical Manual, Section III: Chapter Four: http://www.osha.gov/dts/osta/otm/otm_iii/otm_iii_4.html). The American Conference of Governmental Industrial Hygienists (1992) states that the deep body temperature of the workers should not exceed 38°C/100°F, or that the workers should immediately stop working. Heat stress can be reduced by minimizing heat in the workplace, or gradually expose the workers and let their

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