Heat Stress Guidelines for Work Limits
Discontinue Work If Any of
the Following Occur
- Sustained heart rate minus the individual's age is above
180 beats per minute. (Heart Rate - Age > 180)
- Recovery heat rate at one minute after a peak work
effort is great than 100 beats per minute.
|Body Core Temperature
- Greater than 101.3 F (38.5 C) for medically selected
and acclimated workers
- Greater than 100.4 F (38.0 C) in unselected, un-acclimatized
- Sudden and severe fatigue, nausea, dizziness, or lightheadedness.
- Workers appear disoriented or confused, or suffer inexplicable
irritability, malaise, or flu-like symptoms.
- Sweating stops and skin becomes hot and dry. Seek immediate
emergency care with hospitalization. Call ext. 2222 on site.
- Profuse sweating is sustained over a couple of hours.
- Weight loss over a shift is greater than 1.5% ob body
- 24 hour urinary sodium excretion is less than 50 nmoles.
Last Modified: February 1, 2008
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