Looks like some sort of frame brace......just a guess. Is it on both sides of the frame in that location?
The reason I say that is because I don't see a bunch of frame in the wheel well area. Our Safari has some serious additional frame support in that area.
They are on both sides, and only run the length between the axles. Actually, the other side has a slightly different bolt configuration. Other than that, they are the same. Oh, they are nothing more than a piece of angle iron.
They don't seem to be causing any harm or correcting any problem... that I can tell. Just curious.
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Someone has reinforced that area to place jacks. Not a bad idea.
The axle mounting plate is thin, like everything else on a Vintage Airstream.
With these reinforcements, the axle mounting plates are lesslikely to de-form when jacking up the trailer.
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