What is it?

[mass_burner]

OK, time to play what is it. Got this at the local dump boutique. It has wheels and a pull rope attached, about 18" x 26.
Those are slots cut into it. Its also made of three 3/4" plywood .

 

[begreen]

Movable, draining platform for a potted plant?

 

[mass_burner]

Movable, draining platform for a potted plant?

Hmm, didn't think of that. But why so thick? I just made a few rolling plant carts, 3x18", with 3/4" slats., its plenty strong. Plus water would sit in the channels.

 

[begreen]

Well, it's just a guess. Overkill is not uncommon with backyard carpentry. Thick for moving a large heavy plant tub to keep it in the sun? If this was for patio use then rot may not have been a primary concern.

 

[mass_burner]

There's also a metal wire handle attached. I thought at first it was some type of old time miter platform.

Rolling plant cart? Maybe, but that one shorter channel on one end doesn't drain.

 

[begreen]

You're most likely right. It look a bit like a jig for something.

 

[mass_burner]

I think you were on to something about the weight, plus there's no 45° angle groove. It was probably some specialized shop thing for heavy parts, maybe solid iron stock, and the grooves so they wouldn't roll off.

 

[begreen]

Or it might have been a jig for holding the flat stock in place for welding?

 

[Lake Girl]

I'm thinking a jig ... but reminds me of a cart we used to use for an air compressor.