The Schnabel car is the most specialized rail freight equipment in North America, designed to carry a single extremely heavy and oversized load by actually becoming part of the car structure. Two end-frame assemblies with multiple axle trucks attach directly to fittings on the cargo itself, so the cargo (typically a large transformer or reactor) serves as the central structural member of the car. Schnabel cars can carry loads exceeding one million pounds and are custom-designed or purpose-matched to specific loads. Movement requires careful route clearance surveys, utility wire lifts, and slow-speed operation.
Rigid end frames permanently attached for a dedicated commodity; the most common configuration for large transformer repeat movements.
Hydraulically adjustable end frames that can change span and height to accommodate different loads within a payload class.
Schnabel cars handle once-in-a-decade moves of the largest power transformers and nuclear components, where no other rail or highway equipment can legally or physically carry the load across the continent.