Brazil NR-15 Annex 3 occupational heat exposure limits using IBUTG, Brazil’s WBGT-equivalent index.
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Outdoor IBUTG = 0.7 Tbn + 0.1 Ta + 0.2 Tg| WBGT (°C) | Light 180 W | Moderate 300 W | Heavy 415 W | Very heavy 520 W |
|---|---|---|---|---|
| 24 | Within the NR-15 Annex 3 Table 1 limit (30.8°C max IBUTG at 180W). | Within the NR-15 Annex 3 Table 1 limit (28.2°C max IBUTG at 300W). | Within the NR-15 Annex 3 Table 1 limit (26.6°C max IBUTG at 415W). | Within the NR-15 Annex 3 Table 1 limit (25.5°C max IBUTG at 520W). |
| 25 | Within the NR-15 Annex 3 Table 1 limit (30.8°C max IBUTG at 180W). | Within the NR-15 Annex 3 Table 1 limit (28.2°C max IBUTG at 300W). | Within the NR-15 Annex 3 Table 1 limit (26.6°C max IBUTG at 415W). | Within the NR-15 Annex 3 Table 1 limit (25.5°C max IBUTG at 520W). |
| 26 | Within the NR-15 Annex 3 Table 1 limit (30.8°C max IBUTG at 180W). | Within the NR-15 Annex 3 Table 1 limit (28.2°C max IBUTG at 300W). | Within the NR-15 Annex 3 Table 1 limit (26.6°C max IBUTG at 415W). | Average IBUTG (26°C) exceeds the NR-15 Annex 3 Table 1 limit (25.5°C at 520 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. |
| 27 | Within the NR-15 Annex 3 Table 1 limit (30.8°C max IBUTG at 180W). | Within the NR-15 Annex 3 Table 1 limit (28.2°C max IBUTG at 300W). | Average IBUTG (27°C) exceeds the NR-15 Annex 3 Table 1 limit (26.6°C at 415 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (27°C) exceeds the NR-15 Annex 3 Table 1 limit (25.5°C at 520 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. |
| 28 | Within the NR-15 Annex 3 Table 1 limit (30.8°C max IBUTG at 180W). | Within the NR-15 Annex 3 Table 1 limit (28.2°C max IBUTG at 300W). | Average IBUTG (28°C) exceeds the NR-15 Annex 3 Table 1 limit (26.6°C at 415 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (28°C) exceeds the NR-15 Annex 3 Table 1 limit (25.5°C at 520 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. |
| 29 | Within the NR-15 Annex 3 Table 1 limit (30.8°C max IBUTG at 180W). | Average IBUTG (29°C) exceeds the NR-15 Annex 3 Table 1 limit (28.2°C at 300 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (29°C) exceeds the NR-15 Annex 3 Table 1 limit (26.6°C at 415 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (29°C) exceeds the NR-15 Annex 3 Table 1 limit (25.5°C at 520 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. |
| 30 | Within the NR-15 Annex 3 Table 1 limit (30.8°C max IBUTG at 180W). | Average IBUTG (30°C) exceeds the NR-15 Annex 3 Table 1 limit (28.2°C at 300 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (30°C) exceeds the NR-15 Annex 3 Table 1 limit (26.6°C at 415 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (30°C) exceeds the NR-15 Annex 3 Table 1 limit (25.5°C at 520 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. |
| 31 | Average IBUTG (31°C) exceeds the NR-15 Annex 3 Table 1 limit (30.8°C at 180 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (31°C) exceeds the NR-15 Annex 3 Table 1 limit (28.2°C at 300 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (31°C) exceeds the NR-15 Annex 3 Table 1 limit (26.6°C at 415 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (31°C) exceeds the NR-15 Annex 3 Table 1 limit (25.5°C at 520 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. |
| 32 | Average IBUTG (32°C) exceeds the NR-15 Annex 3 Table 1 limit (30.8°C at 180 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (32°C) exceeds the NR-15 Annex 3 Table 1 limit (28.2°C at 300 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (32°C) exceeds the NR-15 Annex 3 Table 1 limit (26.6°C at 415 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (32°C) exceeds the NR-15 Annex 3 Table 1 limit (25.5°C at 520 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. |
| 33 | Average IBUTG (33°C) exceeds the NR-15 Annex 3 Table 1 limit (30.8°C at 180 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (33°C) exceeds the NR-15 Annex 3 Table 1 limit (28.2°C at 300 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (33°C) exceeds the NR-15 Annex 3 Table 1 limit (26.6°C at 415 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (33°C) exceeds the NR-15 Annex 3 Table 1 limit (25.5°C at 520 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. |
| 34 | Average IBUTG (34°C) exceeds the NR-15 Annex 3 Table 1 limit (30.8°C at 180 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (34°C) exceeds the NR-15 Annex 3 Table 1 limit (28.2°C at 300 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (34°C) exceeds the NR-15 Annex 3 Table 1 limit (26.6°C at 415 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (34°C) exceeds the NR-15 Annex 3 Table 1 limit (25.5°C at 520 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. |
| 35 | Average IBUTG (35°C) exceeds the NR-15 Annex 3 Table 1 limit (30.8°C at 180 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (35°C) exceeds the NR-15 Annex 3 Table 1 limit (28.2°C at 300 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (35°C) exceeds the NR-15 Annex 3 Table 1 limit (26.6°C at 415 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (35°C) exceeds the NR-15 Annex 3 Table 1 limit (25.5°C at 520 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. |
| 36 | Average IBUTG (36°C) exceeds the NR-15 Annex 3 Table 1 limit (30.8°C at 180 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (36°C) exceeds the NR-15 Annex 3 Table 1 limit (28.2°C at 300 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (36°C) exceeds the NR-15 Annex 3 Table 1 limit (26.6°C at 415 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. | Average IBUTG (36°C) exceeds the NR-15 Annex 3 Table 1 limit (25.5°C at 520 W): the activity is characterised as unhealthy (insalubridade, medium grade). Annex 3 as amended by Portaria SEPRT 1.359/2019 sets no work/rest schedule — reduce IBUTG or the metabolic rate through engineering or administrative controls. |
This standard's declared inputs do not include acclimatization status, so results do not vary by it.
Required inputs: wbgtC, metabolicRateW
Optional inputs: none