a deck structure utilizing recycled plastic lumber decking planks which slide onto a rigid frame is provided . the frame includes supporting members having protruding &# 34 ; t &# 34 ;- shaped connectors which selectively fit into preformed grooves on the underside 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 .