a structural deck tile system comprising an interlocking deck tile made of a plywood section coated with a mixture of sawdust and polymers such as recycled plastic . designs and patterns may be embossed or molded into the top surface of the deck tile . the deck tiles have a cut - out notch at each corner and a plurality of interlocking members fit into the notches between adjoining decking tiles to secure them together at the corners . the interlocking members are screwed to the underlying deck joist infrastructure to secure the tiles as one unitary deck tile system , providing structural capacity , and resulting in an economical , aesthetically pleasing , and structurally sound deck with an easier and faster installation . the reduced weight and interlocking fastener system improves the installation process . the endless variety of designs available for the tiles permits individual creative expression in designing exterior decks .