Looking good. I assume you plan to fill it with concrete? That is good. Keep in mind steel is about four times as dense as concrete so if you have various useless scrap steel at your disposal might as well toss that in the box before you top it off with concrete.
John Deere 1025r with 120r front end loader, Hustler zero turn mower
Finished. Has a false bottom full of scrap metal. It was good practice for the welding students and turned out good for me too. Final weight not available, didn’t have a scale that went up high enough. It’s over 425 lbs but I don’t know how much over.