My brother-in-law planted a small grape plant in his backyard and wanted a trellis structure behind it for the grapes to climb on. He asked me to design and build it in the corner of his garden. After going through some designs, we decided to go with a corner arbor. When the project was complete, I created PDF plans on how to build a DIY Corner Arbor with a Bench that includes a trellis for the grapes to grow on.
See my website for additional pictures and how I've built it, TheDIYPlan.com