Although relatively expensive to build, it is sturdy, attractive and should last a long time.
Construction requires basic carpentry skills and tools.
Repeat, building three more frames with the remaining 12-foot lengths of 2 x 4 lumber. Cut four 37-inch lengths of hardware cloth. Fold back the edges of the wire 1 inch. Stretch the pieces of hardware cloth across each frame. Make sure the corners of each frame are square and then staple the screen tightly into place every 4 inches around the edge.