At what mR/hr level should "Caution Radiation Area" signs be displayed while making a radiograph?

"Caution Radiation Area" signs are required at a dose rate of 2 mR/hr or higher. This level signifies that an individual could be exposed to radiation that might exceed acceptable limits for occupational exposure typically defined by regulatory bodies. The threshold of 2 mR/hr acts as a standard to alert personnel and the public to the presence of radiation and ensures that appropriate safety measures are in place to minimize exposure.

At this level, it becomes necessary to implement safety protocols and inform individuals of the potential risk of radiation exposure in the area, ensuring they take necessary precautions. The regulation of such signs is crucial for maintaining safety in environments where radiographic practices occur, thus preventing unintended overexposure to ionizing radiation.