Resolución SRT 30/2023 replaces Argentina's previous heat-stress annex with an equation-driven method: effective TGBH (WBGT plus a clothing adjustment) is compared against a permissible limit VLP and an action limit VLA, both computed from metabolic rate, over each chronological 60-minute period. Crossing the VLA is a control and exposure-reporting duty; crossing the VLP is an escalation with three employer-chosen routes, one of which is a §9.1 work/recovery plan. Neither is a stop-work.
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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 | Below VLA 28.1°C | Below VLA 25°C | Above VLA 23°C — controls + reporting | Above VLA 21.6°C — controls + reporting |
| 25 | Below VLA 28.1°C | Above VLA 25°C — controls + reporting | Above VLA 23°C — controls + reporting | Above VLA 21.6°C — controls + reporting |
| 26 | Below VLA 28.1°C | Above VLA 25°C — controls + reporting | Above VLA 23°C — controls + reporting | Above VLP 25.5°C — detailed study |
| 27 | Below VLA 28.1°C | Above VLA 25°C — controls + reporting | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 28 | Below VLA 28.1°C | Above VLA 25°C — controls + reporting | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 29 | Above VLA 28.1°C — controls + reporting | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 30 | Above VLA 28.1°C — controls + reporting | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 31 | Above VLP 30.8°C — detailed study | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 32 | Above VLP 30.8°C — detailed study | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 33 | Above VLP 30.8°C — detailed study | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 34 | Above VLP 30.8°C — detailed study | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 35 | Above VLP 30.8°C — detailed study | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 36 | Above VLP 30.8°C — detailed study | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| WBGT (°C) | Light 180 W | Moderate 300 W | Heavy 415 W | Very heavy 520 W |
|---|---|---|---|---|
| 24 | Below VLA 28.1°C | Below VLA 25°C | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 25 | Below VLA 28.1°C | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 26 | Below VLA 28.1°C | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 27 | Below VLA 28.1°C | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 28 | Below VLA 28.1°C | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 29 | Above VLP 30.8°C — detailed study | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 30 | Above VLP 30.8°C — detailed study | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 31 | Above VLP 30.8°C — detailed study | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 32 | Above VLP 30.8°C — detailed study | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 33 | Above VLP 30.8°C — detailed study | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 34 | Above VLP 30.8°C — detailed study | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 35 | Above VLP 30.8°C — detailed study | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| 36 | Above VLP 30.8°C — detailed study | Above VLP 28.2°C — detailed study | Above VLP 26.6°C — detailed study | Above VLP 25.5°C — detailed study |
| Parameter | Value |
|---|---|
vlpIntercept | 56.7 |
vlpSlope | 11.5 |
vlaIntercept | 59.9 |
vlaSlope | 14.1 |
restZoneLimitC | 33.7 |
restMetabolicRateCutoffW | 100 |
ptSimplifiedReferenceC | 31.7 |
periodMinutes | 60 |
coreTempObjectiveC | 38 |
coreTempStopAcclimatizedC | 38.5 |
coreTempStopUnacclimatizedC | 38 |
earCanalMonitorAlarmC | 38 |
heartRateAgeReferenceBpm | 180 |
heartRateRecoveryLimitBpm | 110 |
heartRateSustainThresholdMinutes | 2 |
acclimatizationPlanNewWorkerPercent | 20, 30, 40, 50, 60, 80, 100 |
acclimatizationPlanReturningWorkerPercent | 40, 50, 60, 80, 100 |
effectiveDate | 2024-07-22 |
Five source facts deliberately preserved rather than smoothed. (1) 33.7°C and 31.7°C are NOT interchangeable: 33.7 is the VLP at 100 W and belongs to the ft equation's variable A; 31.7 is the VLA at 100 W and belongs to the simplified Pt equation. The resolución states both and does not reconcile them, so they stay bound to their own equation.
(2) Three context-scoped core-temperature rules, not one: §1's assessment objective of 38.0°C, §8.2's interruption criteria of 38.5°C for medically fit acclimatized workers and 38.0°C for unacclimatized workers, and §8.4's personal-monitor ear-canal alarm at 38.0°C, which has no acclimatization carve-out. §7(c) adds a fourth, population-scoped rule for the first trimester of pregnancy.
(3) Table 6 day one is internally inconsistent in the source: 20% of an eight-hour shift is 1.6 h but the cell reads '2 horas', with a footnote permitting the period to be split into two 1-hour blocks. Days 2-7 are all consistent. The published percentages are canonical and the discrepancy is documented rather than silently resolved.
(4) The engine uses equations 1 and 2, not Tables 8 and 9: Table 9 runs 456→22.4, 464→22.3 and then jumps to 479→22.1, omitting the ~471 W / 22.2°C row — a confirmed source omission.
Also not encoded: any °C threshold for the §11 heat-wave duty (the definition is a per-locality P90 percentile set by the Servicio Meteorológico Nacional and the resolución states no temperature), any litres/hour hydration figure (§7d says only 'small quantities, approximately one glass'), and Table 5's work-intensity categories, which the source declares informative and unnecessary to the method.
(5) §8.2's 'durante varios minutos' is unquantified in the resolución, so the engine requires at least 2 minutes as the conservative (earliest-triggering) reading of it and reports the sustained duration and the threshold on every result.
§8.2's (180 − age) bullet is likewise scoped by its own lead-in to workers 'sin alteraciones cardiovasculares', so the engine refuses to apply it to a worker with a recorded cardiovascular disorder or with a status that was never supplied, and states which of the two it is instead of silently firing or silently ignoring.
Required inputs: wbgtC, metabolicRateW
Optional inputs: acclimatization, cafC, restZoneWbgtC, restMetabolicRateW, restsAtWorkSite, physiologicalStrainExcessive, ageYears, heartRateBpm, heartRateSustainedMinutes, cardiovascularDisorder, recoveryHeartRateBpm
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). Registry fields changed — optionalInputs: added ageYears, heartRateBpm, heartRateSustainedMinutes, cardiovascularDisorder, recoveryHeartRateBpm; parameters changed.
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 Argentina Resolución SRT 30/2023 — Especificaciones Técnicas de Carga Térmica (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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