In a pole stability test used to detect decay pockets, what result indicates decay pockets?

In a pole stability test used to detect decay pockets, what result indicates decay pockets?

• A. A dull thud sound
• B. A clear ringing sound
• C. A high-pitched squeal
• D. No sound at all

Answer: (A)

Tapping a pole and listening to the tone helps reveal internal conditions. When wood has decay pockets, the structure is compromised and can’t vibrate as cleanly, producing a dull, muffled thud instead of a bright, ringing sound. A healthy pole produces a clear, resonant tone because its fibers are intact and transmit vibrations well. A high-pitched squeal isn’t a typical sign of decay pockets, and no sound could indicate a completely hollow or severely damaged spot, not just a pocket. So the dull thud best signals decay pockets.

Tapping a pole and listening to the tone helps reveal internal conditions. When wood has decay pockets, the structure is compromised and can’t vibrate as cleanly, producing a dull, muffled thud instead of a bright, ringing sound. A healthy pole produces a clear, resonant tone because its fibers are intact and transmit vibrations well. A high-pitched squeal isn’t a typical sign of decay pockets, and no sound could indicate a completely hollow or severely damaged spot, not just a pocket. So the dull thud best signals decay pockets.