Jack,
I could see the longitudinal bracing on the uprights next to the fence, but what keeps the framework from collapsing away from the building? Is it tied into the building? Is there something more solid than a fence on the opposite side?
Actually, I loved this thread from the moment I read, " I recently put together a way to lift up a camper above my driveway so I could park a car underneath it. It's been working without a hitch for awhile now," Put a hitch on that sucker and go camping!
Best
Les