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OHCOW Heat Stress Calculator

WBGT Adjustment Formula:

\[ WBGT_{adj} = WBGT + C_{clothing} \]

°C

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1. What is WBGT Adjusted for Clothing?

Definition: This calculator adjusts the Wet Bulb Globe Temperature (WBGT) based on clothing type and work rate according to OHCOW (Occupational Health Clinics for Ontario Workers) guidelines.

Purpose: It helps assess heat stress risk more accurately by accounting for factors that affect heat exchange between workers and their environment.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ WBGT_{adj} = WBGT + C_{clothing} + C_{workrate} \]

Where:

Explanation: The measured WBGT is increased based on clothing insulation and metabolic heat production from work rate.

3. Importance of WBGT Adjustment

Details: Proper WBGT adjustment ensures accurate heat stress assessment, helping prevent heat-related illnesses in workers.

4. Using the Calculator

Tips: Enter the measured WBGT, select appropriate clothing type and work rate. The calculator will provide the adjusted WBGT value.

5. Frequently Asked Questions (FAQ)

Q1: What is WBGT?
A: WBGT is a composite temperature used to estimate the effect of temperature, humidity, wind speed, and radiant heat on humans.

Q2: Why adjust for clothing?
A: Different clothing types affect heat dissipation - more insulating clothing requires greater WBGT adjustment.

Q3: What's the work rate adjustment?
A: Higher work rates generate more metabolic heat, requiring greater WBGT adjustment.

Q4: How do I measure WBGT?
A: Use a proper WBGT meter that measures natural wet bulb, globe, and dry bulb temperatures.

Q5: What are OHCOW guidelines?
A: Occupational Health Clinics for Ontario Workers provide heat stress assessment protocols for workplace safety.

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