Schedule V of the Québec Règlement sur la santé et la sécurité du travail sets permissible heat-exposure limit values in °C WBGT for three metabolic workload categories and four hourly work/rest regimens. Sections 121-124 attach a measurement/record duty, a medical-supervision and water/shower duty, and an ordered three-step control hierarchy to exposures at or above the continuous-work curve.
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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 | 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 | 30 / 30 min work/rest per hr | 30 / 30 min work/rest per hr |
| 27 | 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 |
| 28 | 60 / 0 min work/rest per hr | 45 / 15 min work/rest per hr | 15 / 45 min work/rest per hr | 15 / 45 min work/rest per hr |
| 29 | 60 / 0 min work/rest per hr | 30 / 30 min work/rest per hr | 15 / 45 min work/rest per hr | 15 / 45 min work/rest per hr |
| 30 | 60 / 0 min work/rest per hr | 15 / 45 min work/rest per hr | 15 / 45 min work/rest per hr | 15 / 45 min work/rest per hr |
| 31 | 30 / 30 min work/rest per hr | 15 / 45 min work/rest per hr | above Schedule V Table 1 | above Schedule V Table 1 |
| 32 | 15 / 45 min work/rest per hr | above Schedule V Table 1 | above Schedule V Table 1 | above Schedule V Table 1 |
| 33 | above Schedule V Table 1 | above Schedule V Table 1 | above Schedule V Table 1 | above Schedule V Table 1 |
| 34 | above Schedule V Table 1 | above Schedule V Table 1 | above Schedule V Table 1 | above Schedule V Table 1 |
| 35 | above Schedule V Table 1 | above Schedule V Table 1 | above Schedule V Table 1 | above Schedule V Table 1 |
| 36 | above Schedule V Table 1 | above Schedule V Table 1 | above Schedule V Table 1 | above Schedule V Table 1 |
This standard's declared inputs do not include acclimatization status, so results do not vary by it.
| Parameter | Value |
|---|---|
workloadBandsKcalH |
|
wbgtLimitsC |
|
drinkingWaterMinC | 10 |
drinkingWaterMaxC | 15 |
workersPerShower | 15 |
measurementEstablishmentMinWorkers | 50 |
measurementsPerYear | 2 |
registerRetentionYears | 5 |
twaContinuousWindowMinutes | 60 |
twaIntermittentWindowMinutes | 120 |
maxTabulatedWorkloadKcalH | 500 |
Two deliberate omissions, both verified as source gaps rather than encoding gaps. (1) No acclimatization parameter: Schedule V's 'Application de la méthode' declares the WBGT method inapplicable to unacclimatized workers who are physically incapable of the job and to workers in specially adapted heat-protective clothing, rather than offering a NIOSH/ACGIH-style ±2-3°C offset.
Applying such an offset here would invent a mechanism the regulation does not have. (2) No continuous-work curve interpolation: ss. 121/123/124 trigger on 'la courbe de travail continu' in the Schedule V graph, a continuous function of metabolic rate over 100-500 kcal/h, of which Table 1 tabulates only three sampled points per row. The curve exists in the consolidated PDF only as a raster image and was NOT digitised; the three discrete bands are therefore an approximation of the legal trigger and are surfaced as such. Schedule V's own Table 2 recognises 'very heavy' whole-body work at 540 kcal/h while Table 1 gives no limit above 500 kcal/h -- a genuine gap in the source, handled with an unsupported-workload warning.
Required inputs: wbgtC, workload
Optional inputs: metabolicRateW, employerSize
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Get notified when Québec Regulation respecting occupational health and safety (RRQ S-2.1, r. 13) — Schedule V Heat Stress 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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