Built extensions for my cousins trailer. He's a GC (I am too, but we do commercial and industrial) and does house extensions and got a bit of excavation machinery.
Built a rack for my paddle board.. It wouldn't fit in the wallboard rack on my boat so I used 3/4''*.125 tubing, cut on an angle and welded the seams. It's one solide piece. Wrapped it up in foam and voila.
Keep in mind, 28 and a Carpenter, not a welder by any means but I can weld a bit.
Interior railing for my parents place, they want something removable when moving furniture. Not completed yet, it will be filled with wire and turn buckles, horizontally.
Welder is a Lincoln mig pak 140 and I use Flux core wire since I weld outside and the tiny 140 isn't strong enough with gas to weld 1/4'',in my opinion.
Built this shop table for a chop saw with cantrusses leftover.
Sorry for the crappy projects, working on improving the quality