Final answer:
Jobsite supervisors and foremen should be monitoring workers for signs of heat stress every hour according to Occupational Safety and Health Administration (OSHA). This allows for early detection and prevention of heat-related illnesses.
Step-by-step explanation:
Jobsite supervisors and foremen should be monitoring workers for signs of heat stress every hour. Heat stress can lead to serious health problems including heat exhaustion and heatstroke, so it's crucial to regularly check on workers to ensure their safety.
Monitoring workers every hour allows for early detection of heat stress symptoms and the opportunity to take immediate action, such as providing water breaks, shade, and rest periods. It also allows supervisors to assess the effectiveness of any preventive measures implemented.
Additionally, monitoring workers every hour is in line with Occupational Safety and Health Administration (OSHA) guidelines for preventing heat-related illnesses. OSHA recommends frequent monitoring and protection measures to prevent heat stress in workers exposed to high temperatures and/or physical exertion.