Attaching the completed seat to the bottom frame. There are a few ways to attach the seat to the frame. I could have welded it directly to the frame. However, at that point, it would have been fixed (i.e. non removable). For portability purposes I wanted to be able to remove the seat from the frame, if needed. To achieve this functionality, I would need to bolt the seat to the frame. Here you can see some trusses I built and welded to the frame on which to bolt the seat.