Complex curvature

I there a tutorial somewhere that shows the best way to build tubular weld assemblies
In s3d
I’m trying to draw the 3d version of my oven supports made out of a stainless steel 25mm x1mm thick box section

Is it best to draw the whole thing as lines and then sweep them
Or actually draw a box section and extrude each section
A common practice approach would be helpful

Even if we start with just a frame for a cube
I can hopefully work from there
Thanks

Jay Emery