An 1984 article in the "Light Commercial Vehicle Association" magazine about Advance-Design Chevrolet trucks stated that all A-D Suburbans had plywood rear floors but early Panel an Canopy Express rear floors were wood planks. In 1950, " . . the floor boards of panel and canopy express models were changed to plywood construction. In the new construction a single panel of wood and five skid strips replaced thirteen floor boards and twelve skid strips. The new floor was positively sealed against dust leakage and the plywood made the floor 25 to 30% stronger than the former construction."
The 1950 Salesman Truck Data Book (Supplement) states that the rear floor on 3100 and 3800 panel body (Single Unit Body) trucks was changed to 1 piece, 5-ply.
