Työsuojeluhallinto's 'Thermal conditions' guidance defines 'hot work' (kuumatyö) as indoor/workplace air temperature above 28°C and publishes a graduated maximum-continuous-work-period schedule: 28-33°C -> max 50 minutes worked per hour (10-minute break/cooler-space time); above 33°C -> max 45 minutes worked per hour (15-minute break). The underlying general duty (Työturvallisuuslaki 738/2002 §39) only requires limiting exposure to harmful thermal conditions and does not itself state these figures; the authority describes the numeric schedule as developed jointly with FIOH. The authority's own claim that the figures were 'confirmed by the Supreme Administrative Court (KHO)' could not be independently verified in this session (no case citation located) and is NOT asserted as fact here -- legalStatus is 'guidance', not 'regulation'.
Open Finland Työsuojelu Kuumatyö (Hot Work) Indoor Break Schedule in the interactive Guidance Wiki →
No standalone formula is published for this standard; see programmable logic and parameters below.
Governing metric: Indoor/workplace dry-bulb air temperature (°C) -- not WBGT.
| Parameter | Value |
|---|---|
hotWorkThresholdC | 28 |
midBandMaxC | 33 |
midBandWorkMinutesPerHour | 50 |
midBandRestMinutesPerHour | 10 |
highBandWorkMinutesPerHour | 45 |
highBandRestMinutesPerHour | 15 |
A separate, explicitly non-binding FIOH (Tyoterveyslaitos) research-based recommendation for heavy work above +30 deg C (30-minute continuous work / 20-minute recovery break) is documented by the source dossier but deliberately NOT computed by this engine -- it is a distinct advisory figure, from a different source, with a different temperature trigger and workload scope, than the general 28-33/>33 Tyosuojelu schedule above. Blending the two would misrepresent two separately-sourced figures as one. The KHO (Supreme Administrative Court) 'confirmation' claim is authority-asserted only; the specific case citation was not independently located and is not relied upon for legalStatus classification.
Programmable logic: IF indoorTempC <= 28: not 'hot work' -- no break-cycle requirement (60 min work / 0 min rest). IF 28 < indoorTempC <= 33: max 50 min continuous work per hour, min 10 min per hour in a cooler space or equivalent break. IF indoorTempC > 33: max 45 min continuous work per hour, min 15 min per hour break. A separate, explicitly non-binding FIOH recommendation for heavy work above +30°C (30-min continuous work / 20-min recovery) is documented in parameters.note but NOT computed -- do not blend it into this schedule.
Required inputs: none
Optional inputs: indoorTempC