The Runners: Unlike the standard method of onsite building, we use 2" x 4" x 16' number 2 primed lumber. We still install a post every eight feet, but we stagger them. Our method of staggering longer runners, coupled with the posts, creates a long lasting framework. In addition, due to the length of runners, the lumber is milled from the heart of large and mature trees. The pores are tight or small or often closed. As a result, warping and cupping are minimized and crown direction does not matter.