I would look at using the chainlink fence posts for the support for the bench parts. I have smacked a ton of those in using the fence post smacker (the wrong name for it I am sure) They also sell straps meant to hold sections of fencing to the post. I use those to attach other things to posts. I would buy those and some carriage bolts to attach and keep away from the house. (don't want to give critters a nice ladder to get indoors on)

I would put the posts in behind the trellis and rather deep

Here is a link that might be useful: Tension Band

Thank you! I'll give that a shot. That sounds much sturdier than what I had in mind.

I really like your idea!
I would purchase 4X4 outdoor lumber posts. Use a post hole digger and sink the posts into the ground. I would then attach the benches to the posts vertical as trellises. Paint the posts the same color as the trellises.
Make sure the above ground height of the posts is at least 2/3 of the height of the trellis.

This post was edited by lsst on Mon, Jun 3, 13 at 19:21

That's a great find.