| Dry Bulb Temperature Range (°C) | Work time regime with recovery time outside the cold environment for workers using PPE and clothing suitable for exposure to cold |
|---|---|
| +15.0 to -17.9 * +12.0 to -17.9 ** +10.0 to -17.9 *** | Total work time in the cold environment of 6 hours and 40 minutes, with four periods of 1 hour and 40 minutes alternated with 20 minutes of rest and thermal recovery outside the work environment. |
| -18.0 to -33.9 | Total work time in the cold environment of 4 hours alternating with 1 hour of work with 1 hour of thermal recovery outside the cold environment. |
| -34.0 to -56.9 | Total work time in the cold environment of 1 hour, with two periods of 30 minutes with a minimum separation of 4 hours for thermal recovery outside the cold environment. |
| -57.0 to -73.0 | Total work time in the cold environment of 5 minutes with the rest of the shift obligatorily carried out outside the cold environment. |
| Below -73.0 | Exposure to the cold environment is not allowed, regardless of the clothing used. |
(*) Temperature range valid for work in a warm climatic zone, according to the official IBGE map.
(**) Temperature range valid for work in a sub-warm climatic zone, according to the official IBGE map.
(***) Temperature range valid for work in a mesothermal climatic zone, according to the official IBGE map.