Military heat category system that maps WBGT to work/rest and water intake guidance.
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The drag-to-check calculator needs JavaScript. Every value it can show is a row of the table below, which is computed by the same engine.
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 | 40 / 20 min work/rest per hr | 20 / 40 min work/rest per hr |
| 27 | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 40 / 20 min work/rest per hr | 20 / 40 min work/rest per hr |
| 28 | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 30 / 30 min work/rest per hr | 15 / 45 min work/rest per hr |
| 29 | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 30 / 30 min work/rest per hr | 15 / 45 min work/rest per hr |
| 30 | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 30 / 30 min work/rest per hr | 10 / 50 min work/rest per hr |
| 31 | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 30 / 30 min work/rest per hr | 10 / 50 min work/rest per hr |
| 32 | 60 / 0 min work/rest per hr | 50 / 10 min work/rest per hr | 20 / 40 min work/rest per hr | 10 / 50 min work/rest per hr |
| 33 | 60 / 0 min work/rest per hr | 20 / 40 min work/rest per hr | 15 / 45 min work/rest per hr | 10 / 50 min work/rest per hr |
| 34 | 60 / 0 min work/rest per hr | 20 / 40 min work/rest per hr | 15 / 45 min work/rest per hr | 10 / 50 min work/rest per hr |
| 35 | 60 / 0 min work/rest per hr | 20 / 40 min work/rest per hr | 15 / 45 min work/rest per hr | 10 / 50 min work/rest per hr |
| 36 | 60 / 0 min work/rest per hr | 20 / 40 min work/rest per hr | 15 / 45 min work/rest per hr | 10 / 50 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, workload
Optional inputs: none
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Get notified when TB MED 507 Heat Categories changes — threshold changes, scope and legal-status changes, additions and removals. Changes that permit more heat exposure than before are labelled as such.
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