Estimating Work Rates or Loads
Examples of work activities that are considered light, moderate, heavy, and very heavy:
|Work Rate Category||Example Motions||Example Tasks|
ACGIH, 2011. Heat Stress and Strain, in TLVs and BEIs, American Conference of Industrial Hygienists, Cincinnati, OH.
Ramsey, J and Bishop, P. 2003. Hot and Cold Environments (Chapter 24), in The Occupational Environment, its Evaluation, Control, and Management (S.R. DiNardi, Editor), American Industrial Hygiene Association. [After McArdle, Katch and Katch (1996)].
- Introduction (PDF)
- About the Heat Index (PDF)
- Using the Heat Index to Protect Workers (PDF)
- Protective Measures to Take at Each Risk Level (PDF)
- Planning Checklists (PDF)
- Training Workers (PDF)
- Preparing For and Responding to Heat-Related Emergencies (PDF)
- About Work/Rest Schedules (PDF)
- Estimating Work Rates or Loads (PDF)
- Acclimatizing Workers (PDF)
- Monitoring Workers at Risk of Heat-Related Illness (PDF)
|Heat Index||Risk Level||Protective Measures|
|Less than 91°F||Lower (Caution)||Basic heat safety and planning|
|91°F to 103°F||Moderate||Implement precautions and heighten awareness|
|103°F to 115°F||High||Additional precautions to protect workers|
|Greater than 115°F||Very High to Extreme||Triggers even more aggressive protective measures|
How can OSHA help? Workers have a right to a safe workplace. If you think your job is unsafe or have questions, visit OSHA's Worker's Page or call 1-800-321-6742 (OSHA). It's confidential. For other valuable worker protection information, such as Workers' Rights, Employer Responsibilities, and other services OSHA offers, visit OSHA's Workers' page.
OSHA also provides help to employers. OSHA's On-site Consultation Program offers free and confidential advice to small and medium-sized businesses in all states across the country, with priority given to high-hazard worksites. For more information or for additional compliance assistance contact OSHA at 1-800-321-6742 (OSHA).