Free construction drawings for homemade furniture.
See how you can make a canopy bed with a frame from scaffolding tubes and Kee Klamps

How to make beds with a frame from steel pipes.

Some easy examples how you can make a canopy bed from scaffolding tubes
All the construction manuals and drawings are free to use.
You can download the construction plans for free, but you are not allowed to sell them or use them on a website or any other publication.