How to Build a Bamboo Tri-Pod Trellis
Many pole bean and pea varieties can grow to six or seven feet tall so you’ll need a trellis that can support that growth. Sweet peas can also use such supports.
An inexpensive, and easy way to create a tall, semi-permanent trellising structure for your peas or pole beans is with 8' bamboo poles (about $5 each at your local home or garden center) and Jute Twine.
Check out the photos and instructions at Seattle Urban Farm Company for an easy garden project.
Or if you happen to have a neighbor or friend with bamboo, they will usually be happy to cut some for you.