Working from this design (although since changed the box section sizes) I'm trying to build this... Legs will be 50x50x1.5 ERW Other parts 20x40x2 ERW Steel delivered And cut And the foot end made. Unfortunately this doesn't fit up the stairs. There's an awkward corner at the bottom that it won't quite go round. So now I've cut it up again and need a new plan. I don't want any visible fasteners and I'm not sure how I'm going to do this without comprising rigidity and also keep fasteners invisible. My original plan is out the window.