Abstract: A series of dual-transverse-tubular screed rail guide connectors are slidably attached to a cooperating series of vertical support rods driven into a substrate at defined intervals to establish a pavement grade and perimeter. Each connector comprises an adjustable horizontally-oriented tubular sleeve that is slidably attachable at variable heights to a support rod by means of an integral vertically-oriented tubular clamp. Sections of tubular screed rail guides are inserted through the tubular sleeves of the connectors to define the perimeter of the area to be paved.