As Carl posted:
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.” (from an article in the light commercial vehicle association, 1984)
