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CPWR / OSHA-CPWR Construction Heat Overlay — Heat Stress Control Measures

Construction-sector heat overlay emphasizing acclimatization, water, rest, shade, training, buddy system, and symptom response.

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Governing metric
WBGT / Heat Index / controls
Authority
CPWR / OSHA-CPWR Alliance
Jurisdiction
Usa Construction
Legal status
Industry Guidance
Published
2023-06 (unverified)
Rule type
Control Overlay
Standard ID
HGC-048

Check a reading against this rule

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.

Governing formula

No standalone formula is published for this standard; see programmable logic and parameters below.

Control measures

Acclimatized workers

WBGT (°C)Light
180 W
Moderate
300 W
Heavy
415 W
Very heavy
520 W
24PlanningPlanningPlanningPlanning
25PlanningPlanningPlanningPlanning
26PlanningPlanningPlanningPlanning
27PlanningPlanningPlanningPlanning
28ModerateModerateModerateModerate
29ModerateModerateModerateModerate
30ModerateModerateModerateModerate
31ModerateModerateModerateModerate
32HighHighHighHigh
33HighHighHighHigh
34HighHighHighHigh
35HighHighHighHigh
36HighHighHighHigh

Unacclimatized workers

WBGT (°C)Light
180 W
Moderate
300 W
Heavy
415 W
Very heavy
520 W
24PlanningPlanningPlanningPlanning
25PlanningPlanningPlanningPlanning
26PlanningPlanningPlanningPlanning
27PlanningPlanningPlanningPlanning
28ModerateModerateModerateModerate
29ModerateModerateModerateModerate
30ModerateModerateModerateModerate
31ModerateModerateModerateModerate
32HighHighHighHigh
33HighHighHighHigh
34HighHighHighHigh
35HighHighHighHigh
36HighHighHighHigh

Inputs

Required inputs: wbgtC

Optional inputs: workload, acclimatization

Sources

Update history