1. Trim from the prunings any side branches.
2. Lay the crosspieces (A) horizontally on a flat surface, with two of them 18 inches apart, and the third 16 inches above the center one.
3. Lay the centerpiece (B) vertically across the crosspieces. The bottom end of the centerpiece should overlap the lowest crosspiece by 4 1/2 inches. Nail centerpiece to crosspieces at center joints.
4. Lay side pieces (C) vertically over crosspieces as shown, setting them about 3 1/2 inches in from the ends of the crosspieces. Nail to crosspieces at the joints.
5. Place D and E pieces diagonally between crosspieces, slightly overlapping the horizontal crosspieces as shown. Nail them to the horizontals at the joints.
6. Place top pieces (F) so they cross behind the centerpiece (B) and on top of the side pieces (C).
7. For additional stability, turn structure over and nail joints from the back side, then wrap wire several times around the main intersections.