Abstract: Stringers are fabricated in the form of a tube. The tube in cross section as viewed from its ends has a substantially square shape. Each stringer is fabricated from a plate material which includes a rectangular lower plate and two side plates separately connected to both edges of the rectangular lower plate through respective folding lines. There are a pair of first support plates partially cut out of the lower plate. The support plates are connected to the lower plate along folding lines. These folding lines are located inwardly from both ends of the lower plate and are in parallel with these ends. There are a pair of upper plates separately connected to distal edges of the side plates through respective folding lines. Also, there are second support plates separately connected to distal edges of the upper plates through respective folding lines. A pallet including an upper deck and a lower deck includes a plurality of the fabricated stringers.