smokyriver wrote:The sucker rod is not too bad but has the faults of being hard to secure any tin to. The same as rebar.
Unless you can weld/tack it to the sucker rod or rebar. I don't know much about welding (husband is a very good welder, but hasn't taught me yet. It's on the list of skills to obtain), so I'm not sure that's possible ... you could probably drill pilot holes into the sucker rod and then attach the tin with regular tin roofing screws - the ones with the rubber gasket thingy and the washer already pre-attached. I'm somewhat out of my element when working with metal, though, so I am quite likely just talking out of my arse here. Mostly, though, metal is just heavier than wood, so if weight is an issue ... plus there's the part where you freeze your fingers on colder days.
I have some extra tin lying around from when I had the studio reroofed, so I was planning on using it somehow for the tractors - I was just thinking of roofing the shelter portion of the tractor with it, though, with possibly an extension over a portion of the pen to create a covered-porch type area.
Wheels are definitely a must. I was thinking of doing a sort of skid/wheel combo, with the wheels attached to the heavier shelter portion of the tractor, and 2x4 or 2x6 skids down the pen portion. Ideally I would like to be able to move them by hand, so would put a good handle on the front (a single handle, going the width of the pen, rather than a handle on either side) and use the weight at the rear to help cantilever it during moving.
I think, too, by putting the wheels at the rear, it would help eliminate the escaping birds/invading predators issue - provided you can shoo the birds inside the shelter before you move it, they shouldn't escape out the front while you're lifting.
My parents had a (small) chicken tractor, and my dad built what was essentially a moveable shooing wall inside the tractor that slid from the front of the pen to the shelter to expedite the process of getting the chickens back into the shelter. I'm not sure the idea would work on a larger tractor, though.