Build the Legs
Secure the edge of a 1 x 2 leg piece to the face of a 1 x 3 leg piece, flush with its edge, to form an L. Repeat to make four legs.
Attach the Panels and Floor Support
Secure front and back panels to the back sides of the 1 x 3 leg pieces, 2 inches from the ends. Secure side panels to the back sides of the 1 x 2 leg pieces. Secure floor supports between the front and back panels.
Trim Hamper and Insert Floor
Secure crosspieces so that the lower ones sit flush with the bottoms of the panels and the upper ones with the handle cutouts sit flush with the tops of the legs. Drive screws at an angle through the top edges of the upper crosspieces and into the legs. Secure the plywood floor to the floor supports.
Assemble and Attach Lid
Secure the lid’s short frame pieces between the long frame pieces. Secure the panel to the frame. Attach the lid to the hamper with two butt hinges. Add a stop hinge on one side.