How to Build a Pyramid Trellis

Once the framing strips' ends are mitered at parallel 10-degree angles—to get an A-frame that's flat at the top and bottom—one of each pair must be mitered again at the tip for the peak to fit against the finial. Hold one strip against the nailing ledge with its outside edge flush with the finial's outside edge and angle; hold its partner in the A-frame with its outside edge flush with the end of the nailing ledge, leaving a gap for the adjacent side's A-frame. The second strip's tip will overlap the first. Scribe the overlap and trim it off with a utility knife. Repeat for all pairs.