Abstract: A floating dock is formed from a fabricated frame including a pair of longitudinal extruded side rails and a plurality of cross rails interconnecting the side rails to form a rigid generally rectangular structure arranged to receive buoyancy members for floating the frame on a body of water. A plurality of floor planks bridge the side rails for forming a floor surface on the frame to be supported above the water. The rails include grooves in each surface defining a fastener having a nut to be located in the groove and a co-operating male fastener for engaging into the nut. The outer surface fastens to a rail along the outer surface and the inner surface carries the ends of the floor planks and attaches to fastening brackets of corner members.