My vote is 'Quite Brilliant' :)

You may want to add some string or jute for the plants to grab on to where you have empty spots or where the iron is maybe to thick for them to wrap/grab. For several years we've used fence post with netting in between and it's easy to wind up and put away when we're done with it. We do ours down the middle of a raised bed so we can pick from both sides and then plant spring salad veggies (lettuce, spinach, radish, beets, etc... around the bottom in front of the peas. Makes for a yummy salad bed!

Thank you. I'll continue on with my plan then. I'll try to remember to post pictures in the Spring.

I vote "brilliant", too.
By using a wrought iron headboard or footboard, you are incorporating artwork into an otherwise boring vegetable garden.

My yard is not the sunniest so peas tend to stretch pretty far to get the sunshine they need. Mine get at least head high (I'm 5' 10"). So you might want to figure out a way to raise up the bed frame and run strings down to the baby peas so that they can find their way up to it. Also, I wouldn't expect to see the bed frame once the peas get going because they tend to overwhelm anything they climb on.

I usually pre-soak my peas (I grow all the edible peas as well as sweet peas which are poisonous) and sow them starting in January and into February as well as Nasturtiums. Lettuce and other greens get started inside the house at any time over the winter and moved outside in early March. I usually don't get peas to eat until early June and by then the lettuce has bolted except for what I grow inside on the windowsill or under lights.