NIOSH heat guidance used for screening heat stress risk with environmental and clothing adjustments.
Browse all standards → · Evaluate every standard at once in the calculator →
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.
Scenario: full sun exposure · 50% relative humidity
| 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 | 45 / 15 min work/rest per hr | 45 / 15 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 | 40 / 20 min work/rest per hr |
| 27 | 60 / 0 min work/rest per hr | 60 / 0 min work/rest per hr | 35 / 25 min work/rest per hr | 35 / 25 min work/rest per hr |
| 28 | 60 / 0 min work/rest per hr | 45 / 15 min work/rest per hr | 30 / 30 min work/rest per hr | 30 / 30 min work/rest per hr |
| 29 | 60 / 0 min work/rest per hr | 35 / 25 min work/rest per hr | 25 / 35 min work/rest per hr | 25 / 35 min work/rest per hr |
| 30 | 60 / 0 min work/rest per hr | 25 / 35 min work/rest per hr | 15 / 45 min work/rest per hr | 15 / 45 min work/rest per hr |
| 31 | 45 / 15 min work/rest per hr | 20 / 40 min work/rest per hr | Stop work | Stop work |
| 32 | 35 / 25 min work/rest per hr | Stop work | Stop work | Stop work |
| 33 | 15 / 45 min work/rest per hr | Stop work | Stop work | Stop work |
| 34 | Stop work | Stop work | Stop work | Stop work |
| 35 | Stop work | Stop work | Stop work | Stop work |
| 36 | Stop work | Stop work | Stop work | Stop work |
This standard's declared inputs do not include acclimatization status, so results do not vary by it.
Required inputs: wbgtC, workload, sunExposure, relativeHumidity
Optional inputs: airTempC, nioshMetricBasis
Recovered from repository history: optionalInputs changed. The direction of the safety effect was not computed, because reproducing it would require running the engine as it stood on that date.
This standard was added to the calculator.
Get notified when NIOSH 2016-106 Table 6-2 changes — threshold changes, scope and legal-status changes, additions and removals. Changes that permit more heat exposure than before are labelled as such.
Paste this address into any feed reader:
https://heatrules.com/standards/niosh_table/feed.xml
Open the feed · All update feeds · No account or email address is needed; the site keeps no subscriber list.
If a threshold, trigger, exemption, date or duty here disagrees with the governing text, tell us and point at the section. The form arrives with this standard already named, and a correction is checked against the same primary document it was encoded from.