a pallet includes a deck having columns supporting the deck . the deck includes a plurality of ribs extending downwardly from an upper sheet . a reinforcement sheet is secured to lower ends of the ribs . the reinforcement sheet is a coextruded sheet having a first material selected to bond well with the ribs and a second material selected for other improved physical properties . in the example disclosed herein , the second material is chosen for improved fire retardant properties . as one example , the reinforcement sheet can be vibration welded or hot plate welded to the lower ends of the ribs , thereby providing a strong weld between the reinforcement sheet and the ribs , which provides increased performance of the upper deck while the fire retardant layer of the reinforcement sheet provides fire retardant properties to one of the largest surfaces on the pallet .