There were about 30 board/ft of 4x10's in a construction-site slash pile. I asked, got a yes, dragged them home and pulled about a thousand nails out before I milled them down and bolted them together into a little bench. (which needs a fresh squirt of CWF, as we can all see). I didn't need a bench, but that much lumber going to waste wasn't going to happen in my neighborhood.