A new home that my company built this year included a two-story radiused porch, the framing of which I described in the article “Framing a Half-Round Porch” (Apr/19). This distinctive structure is attached to a corner of the home and is highly visible from a nearby street. The original elevations showed a railing between the posts, but the client requested that I use a recessed flat-panel knee-wall design that I have used on a few other homes. The design is relatively simple—in many regards, simpler than a railing system. The biggest challenge would be executing the design on a curve.

Before working out the details of the knee walls, we installed finished surrounds on the steel support columns with adequate blocking inside the surrounds for attaching knee-wall framing and screen panels. At the time of writing this article, we had already completed the curved panels on the second floor, which gave us a chance to work out the kinks in the process.

Every curved detail of the porches worked off one center point, which was key to the framing process as well as to laying out and cutting the travertine tile for the finished floor of the lower porch. But the mark was covered by the new floor, so we first had to draw on our high-school geometry to re-establish that point. Once we’d found the center of the circle, finishing the rest of the steps for this eye-catching curved detail was pretty straightforward.

Photos by Nathaniel Eldon