Abstract: A structure for decks or other structures is disclosed which utilizes recycled plastic lumber decking planks which slide onto a rigid frame. The frame includes supporting members having protruding "T"-shaped connectors which selectively fit into preformed grooves on the side surfaces of the plastic planks. The manner in which the planks are secured to the frame allows for the expansion and contraction of the individual plank lengths due to temperature variations. In addition, brackets are provided which fasten railings and the like to the rigid frame.