Singapore outdoor work heat stress measures with a WBGT trigger for minimum shaded rest.
Open Singapore MOM / WSH (WBGT ≥ 32°C) in the interactive Guidance Wiki →
No standalone formula is published for this standard; see programmable logic and parameters below.
| WBGT (°C) | Light 180 W | Moderate 300 W | Heavy 415 W | Very heavy 520 W |
|---|---|---|---|---|
| 24 | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr |
| 25 | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr |
| 26 | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr |
| 27 | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr |
| 28 | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr |
| 29 | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr |
| 30 | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr |
| 31 | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr |
| 32 | 55 / 5 min work/rest per hr | 55 / 5 min work/rest per hr | 50 / 10 min work/rest per hr | 50 / 10 min work/rest per hr |
| 33 | 50 / 10 min work/rest per hr | 50 / 10 min work/rest per hr | 45 / 15 min work/rest per hr | 45 / 15 min work/rest per hr |
| 34 | 50 / 10 min work/rest per hr | 50 / 10 min work/rest per hr | 45 / 15 min work/rest per hr | 45 / 15 min work/rest per hr |
| 35 | 50 / 10 min work/rest per hr | 50 / 10 min work/rest per hr | 45 / 15 min work/rest per hr | 45 / 15 min work/rest per hr |
| 36 | 50 / 10 min work/rest per hr | 50 / 10 min work/rest per hr | 45 / 15 min work/rest per hr | 45 / 15 min work/rest per hr |
This standard's declared inputs do not include acclimatization status, so results do not vary by it.
Required inputs: wbgtC
Optional inputs: workload
This standard was added to the calculator.
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