QTP4B051-17 — Thermal Stress

QTP4B051-17 governs training on analyzing thermal stress hazards and recommending thermal stress controls.

Search QTP4B051-17

• Publication number: QTP4B051-17
• Title: Thermal Stress
• Date: 2022-07-15

View QTP4B051-17 on armypubs.army.mil

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It covers WBGT measurements, heat and cold stress evaluation, outdoor and indoor WBGT calculations, and wind chill conditions. It requires analysis of specialist-clothing effects and completion of the listed training checklist items.

Topics covered

• WBGT measurements
• Heat stress
• Cold stress
• Wind chill conditions
• Thermal stress controls
• Specialist-clothing ensembles

Questions and answers

What precaution is required for the dry bulb thermometer outdoors?

The dry bulb must be shielded from radiant heat. (paragraph 1)

When must monitoring of the wet bulb globe temperature begin?

When the temperature is forecasted to exceed 85oF. (paragraph 2)

What temperatures are needed to calculate outdoor WBGT with direct sunlight?

To calculate the outdoor WBGT with direct sunlight, all three temperatures (WB, DB, and GT) are needed. (paragraph 3)

How much is added to WBGT for specialist-clothing ensembles?

AFMAN 48-151 states for specialist-clothing ensembles (individuals are working in ground crew ensemble, firefighting gear or other similar restrictive or impermeable clothing) 10 degrees F is to be added to the WBGT measurement before applying the work schedule guidelines at Tables A5-1 and A5-2 of Attachment 5. (paragraph 4)

How much additional WBGT is added for combat armor?

A further 5 degrees WBGT should be added if individuals are wearing combat armor. (paragraph 5)

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