In Defective Fasteners Drive Structural Failures ForensisGroup® expert witness John D. Pratt, Ph.D., P.E., discusses failures of mechanically-fastened joints:
Industrial fasteners are no less subject to quality or installation defects. Leaking roofs, sudden ladder and seat anchorage failures, corrosion, poor paint adhesion, and numerous other manifestations of poor fastener quality are avoidable with more attention to the manufacturing and installation details.
Poor fastener quality and installation practices are at the root of most, but not all, fastener failures. A misunderstanding as to how published strength allowables are established can also contribute to premature failure.
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