Which inspection method uses chain drags to assess the soundness of concrete decks?

The method that employs chain drags to evaluate the soundness of concrete decks is classified as a physical inspection method. This technique involves applying a chain drag across the surface of the concrete deck, which helps identify delaminations and other issues beneath the surface. When the chain drags over areas of compromised integrity, it produces distinctive sounds or feels different in resistance, indicating potential problems such as voids or cracks within the concrete.

This hands-on approach allows inspectors to gather tangible data about the condition of the deck, making it an effective means of assessing structural soundness. By physically engaging with the material, this method provides insights that may not be apparent through visual observation alone, highlighting its importance in comprehensive bridge inspections.