Tandem Subarc Tractor

[Ducks]

I'm looking for a subarc tractor that will carry two wire spools, flux hoppers and guns to weld in two different places at the same time.

I'm welding girders and want to be able to weld both web-to-flange fillet welds at the same time as the tractor runs down the length of the girder on the web.

I would also use it to weld both sides of a beam/girder stiffener plate at the same time.

Anyone have a link or suggestion for such a piece of equipment?

Thanks

[cruizer]

Pretty tough to control, while its common to have 2 controllers, and 2 subarc welders for one weld, its not so common to weld in 2 different places with the same tractor. I don't recollect seeing it.

[Ducks]

Thanks.

I think they're most common in the bridge building industry (for plate girders and such).