Cardinal's PRL Series heavy duty, self-contained mechanical truck scales are made for endurance and accuracy. Tandem units are simply composed of two or more scales of the same or different platform lengths tandem-connected for greater capacity. When split, each unit is a self-contained scale in itself, offering 3-in-1 scale flexibility. The 5/16" full checkered steel deck plate is standard and an optional wood deck is also available (PSRL models).