Denoting a fence or enclosure made from pieces of wood split lengthwise from logs:a split-rail fence...
Just a split-rail fence embedded in a cement berm divided us from the llamas.
They've taken more turns through the judicial system than a split-rail fence.
Imagine the arching canes of a climbing rose along a split-rail fence; canes arching in this fashion produce many more flowers than canes growing straight up.