The college where I work is tearing down some old housing, and the wrecking crew gave me a railing, 5’ of 1/2” round, 3’ of 3/4” x 2-1/2”, and a big hunk o’ black iron pipe. They’ve still got three buildings to go, so it looks like there’s more where that came from.
In other news, I realized that one of the fittings on another piece of plumbing I rescued last year appears to be a 1” x 3/4” tee. Hmm....