I have designed my own take on BeeBarn side rails. They print in 2 pieces and connect by a dovetail and glue. There is a screw hole, to screw the top together. The bottom rail rests inside the bottom side and is attached by glue.
The inside of the model is partially hollow to require less plastic.
I printed them between 80-100% infill using Petg. I have used them through one season and they are working great!
The author marked this model as their own original creation.