These were a perfect and inexpensive way to organize our two cords of wood. You do need wood 4x4’s to your desired length. We made ours 12’ and have not experienced any bowing of the bars, though we do reinforce the ends of the pile with a little criss cross apple sauce stacking technique. Posting pictures from last year (full pile) and this year (one of three racks full-must not have felt the need to take a picture of the finished pile), so you can tell they’re still in good shape. Would recommend!