Turns out a lot of people build stuff with this material. Great. Found a few local shops online that sell it to spec. Not too expensive either.
The piping comes in 26.9, 33.7, 42.4, 48.3 & 60.3 mm width.
Here’s a bed they made with it:
this seems to be the biggest one although no doubt there’s bount to be cheaper metal ot be had online.
Next: Need to figure out how much weight they will support and how to do the cableing next. Design all the “accessoires” I will need. Get in touch with Ronald at Mutrox for some input on the decoupling of the frame from the rest of the building.