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Australia Thermal Work Limit (TWL) — Heat Stress Work/Rest Limits

Thermal Work Limit model used in mining and heavy industry to estimate sustainable metabolic rate.

Open Australia Thermal Work Limit (TWL) in the interactive Guidance Wiki →

Authority
WorkSafe Queensland / Mining and Quarrying Safety and Health Act
Jurisdiction
Australia
Legal status
Guidance
Rule type
Schedule Engine
Standard ID
HGC-055

Governing formula

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

Work/rest limits

TWL (W/m²)Result
80Stop work
90Stop work
100Stop work
110Stop work
12045 / 15 min work/rest per hr
13045 / 15 min work/rest per hr
14060 / 0 min work/rest per hr
15060 / 0 min work/rest per hr
16060 / 0 min work/rest per hr
17060 / 0 min work/rest per hr
18060 / 0 min work/rest per hr
19060 / 0 min work/rest per hr
20060 / 0 min work/rest per hr
21060 / 0 min work/rest per hr
22060 / 0 min work/rest per hr
23060 / 0 min work/rest per hr
24060 / 0 min work/rest per hr
25060 / 0 min work/rest per hr
26060 / 0 min work/rest per hr

Inputs

Required inputs: twlWm2

Optional inputs: airTempC, wetBulbC, globeTempC, windSpeedMS, atmPressurehPa

Sources

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