At what depth should strut pin holes be condemned?

The correct depth at which strut pin holes should be condemned is 3/16 inch. This standard is typically established to ensure the structural integrity of the components being analyzed. When strut pin holes become excessively worn or oversized, they can compromise the strength and stability of the assembly they are part of.

At a depth of 3/16 inch, the hole may no longer provide the necessary tight fit and strength required for safe operations, leading to potential failures in the system. This benchmark serves as a safety measure, indicating that any wear beyond this threshold necessitates consideration for replacement or repair to maintain safe and effective equipment functionality.

The other options represent either too shallow or too deep thresholds, which would not align with established safety practices for condemning worn components. These standards are critical for ensuring the longevity and reliability of railway systems.