The transfer case of a four-wheel-drive (4WD) truck catastrophically failed. Nelson’s evaluation determined that the failure originated at a failed yoke ear at the front differential pinion yoke. The front…
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A portion of a fire sprinkler system in a warehouse suddenly collapsed. Nelson’s evaluation determined that some of the sprinkler system hangers were constructed with undersized all-threaded rod and that…
A dry freight van trailer partially collapsed subsequent to receiving a load of bottled water and being moved from the loading dock to a parking space by a terminal tractor….
A building began experiencing inadequate cooling, high relative humidity (RH), and surface condensation on the supply air registers after its heating, ventilating, and air-conditioning (HVAC) system was replaced. Nelson’s evaluation…
Nelson was asked to determine the origin and cause of the fire event that occurred, ironically, at a wood burning fireplace in a residential structure. The building was constructed and…
A high pressure steam power boiler was discovered to have failed catastrophically during unattended overnight operation. Nelson was asked to evaluate the boiler system and determine the failure cause. Nelson…
A five story apartment complex began experiencing sanitary drain piping failures in the upper floors shortly after construction was complete. The polyvinyl chloride (PVC) branch pipes located inside the wood…
A building suffered severe water damage when a PVC pipe fitting failed on a condenser water riser. Nelson’s mechanical engineers determined that the rigid riser support system could not compensate…
