During hammer testing of a pole, what area should be tested circumferentially?

The correct answer involves testing the entire height of the pole from the ground upwards, reaching as high as possible. This comprehensive approach ensures that any potential defects or weaknesses in the structural integrity of the pole are detected. Testing circumferentially across the full height of the pole is vital, as issues may not be limited to one specific section; stresses or damage could occur anywhere along its length. By focusing on the area from ground level to the maximum reachable height, the assessment provides a thorough evaluation of the pole’s durability and safety, which is crucial for flagger safety and the overall functionality of traffic control measures.