I have grown runner beans and flat beans for years.
I normally grow my runner beans up a traditional triangle cross pole setup and my flat bean on another one that are separate from each other.
About 5 foot high and four foot across, top is the poles crossed, bottom width is about 2 feet.
This gives me a lot runner beans, really too many.
So am thinking to grow runner beans up one half and flat beans up the other.
I've done a rough diagram to show what I mean.
Has anyone ever done this and apart from making sure you tease the beans to their side, would you see any other problems?