[jyl]

I was informed that we “need” a trellis at the top of the stairs to our house, and the threat was that some cheapass Home Depot thing would be purchased. Wait, thought I, this is a great time to use up the scrap lumber that my wife complains about. So I built an interesting looking trellis from scrap, screws, and glue. For the uprights, I didn’t have enough scrap 4x4 or 6x6, so I ripped lengths of 1/2” board and boxed them into 7’ lengths, glued and screwed. Wow, these are rigid, seem strong, and are light. So what do we think about rafters of 4” x 10”, hollow, boxed from 1/2” ply, caulked and painted? Any link to a calculator for the strength of something like this?