For pea's I'm trying canes crossed in the middle this year with a wooden rectangular frame at the top, which the canes are attached to, to strengthen the structure. This has two long wooden lattes nailed to the middle of the shorter sides and driven into the ground by about 1ft. Read about the idea in a book. There are 5 canes either side.
I also grow beans up one side of three arches over the garden path. The other side has a selection of climbers. Sounds like a lot of beans but I grew 2 to 3 plants of different coloured pods last year and had a colourful display of purple, green, yellow and red/cream pods reaching over the arches creating a lush green canopy.
I've discovered some new varieties to try this year, Lablab beans have perfumed flowers which flower in different colours so ideal for growing by a path. Black eye cowpea's leaves are edible, can be cooked like spinach and the beans dried.