Before constructing the bed ends, install a piece of angled flashing at all four corners. Insert one arm of the flashing between the frame and the liner, making sure the center fold of the flashing rests against the end of the liner. The bottom edge of the flashing should align with the bottom edge of the liner.

Secure the flashing to the liner using metal-to-wood screws (or sheet metal screws). To prevent injury, be sure to remove protruding screw tips.

Complete the frame by installing the end sections. Attach a 2-inch by 4-inch by 37-inch-long drilled board to each bed end using 3-inch wood screws. Before fastening, make sure the upper and outer surfaces of the boards are flush with the upper and end surfaces of the 2-inch by 4-inch boards in each side frame section.

Drop 5/8-inch by 36-inch-long sucker rod stakes into each hole and drive the stakes flush with the top of the boards.

Lock the end frame sections in place using pieces of lath and wood screws.

Finish construction by installing a 3-foot-long piece of sheet metal to the inside surface of each end frame section. Be sure the top of each piece is level with the top of the metal sheets on the sides of the bed before fastening with metal-to-wood screws.

Last but not least, secure the metal liner at each end of the bed to the flashing on each corner using metal-to-wood screws. Don't forget to clip off the protruding screw tips.

You have now completed a corrugated sheet metal bed. Construct additional beds using the previously described procedures.

It is now time to fill the beds.