EXTECHINSTRUMENTS
12 HT200‐en‐GB_V1.411/16
ThermalHazardPreventionStandards
Screening Criteria for Heat Stress Exposure (WGBT values in °C); for reference purposes only.
Exam
pleofActivitieswithinMetabolicRateCategories*
Categories
Examples/Activities
Resting
Sittingquietly
Sittingwithmoderatearmmovements
Light
Sittingwithmoderatearmandlegmovements
Standingwithlightworkatmachineorbenchwhileusingmostlyarms
Usingatablesaw
Standing withlight ormoderate workat amachine orbench andsome
walkingabout
Moderate
Scrubbinginastandingposition
Walkingaboutwithmoderateliftingorpushing
Walkinglevelat3.7mph(6Km/hr)whilecarrying6.6lbs.(3Kg)weight
Heavy
Carpentersawingbyhand
Shovelingdrysand
Heavyassemblyworkonanon‐continuousbasis
Intermittentheavyliftingwithpushing/pulling(pick‐and‐shovelwork)
Veryheavy Shovelingwetsand
*AccordingtotheAmericanConferenceofGovernmentalIndustrialHygienists[ACGIH](2005)
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