British Columbia WorkSafeBC heat exposure standard (OHS Guideline G7.28). Adopts ACGIH TLV/AL WBGT thresholds as the regulatory benchmark. Requires an Exposure Control Plan when thresholds are approached or exceeded.
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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 | 75–100% Work | 75–100% Work | 50–75% Work | 25–50% Work |
| 25 | 75–100% Work | 75–100% Work | 50–75% Work | 25–50% Work |
| 26 | 75–100% Work | 75–100% Work | 50–75% Work | 25–50% Work |
| 27 | 75–100% Work | 75–100% Work | 50–75% Work | 25–50% Work |
| 28 | 75–100% Work | 75–100% Work | 25–50% Work | 25–50% Work |
| 29 | 75–100% Work | 50–75% Work | 25–50% Work | 0–25% Work |
| 30 | 75–100% Work | 25–50% Work | 0–25% Work | 0–25% Work |
| 31 | 75–100% Work | 0–25% Work | Exceeds screening criteria | Exceeds screening criteria |
| 32 | 25–50% Work | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria |
| 33 | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria |
| 34 | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria |
| 35 | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria |
| 36 | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria |
| WBGT (°C) | Light 180 W | Moderate 300 W | Heavy 415 W | Very heavy 520 W |
|---|---|---|---|---|
| 24 | 75–100% Work | 75–100% Work | 50–75% Work | 25–50% Work |
| 25 | 75–100% Work | 75–100% Work | 25–50% Work | 0–25% Work |
| 26 | 75–100% Work | 50–75% Work | 0–25% Work | 0–25% Work |
| 27 | 75–100% Work | 25–50% Work | 0–25% Work | 0–25% Work |
| 28 | 75–100% Work | 0–25% Work | 0–25% Work | Exceeds screening criteria |
| 29 | 25–50% Work | 0–25% Work | Exceeds screening criteria | Exceeds screening criteria |
| 30 | 0–25% Work | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria |
| 31 | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria |
| 32 | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria |
| 33 | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria |
| 34 | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria |
| 35 | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria |
| 36 | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria | Exceeds screening criteria |
Required inputs: wbgtC, workload
Optional inputs: acclimatization
This standard’s output changed in the reference scenarios, in a form that does not reduce to permitted work minutes (for example a screening limit, risk level, or respirator tier).
This standard was added to the calculator.
Get notified when British Columbia WorkSafeBC Heat Exposure Standard (OHS Guideline G7.28) 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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