check out this write-up about a way to combine different types of building blocks together, or check out this write-up about creating the frame of a DIY CNC mill with a metal building set.

One of the leading manufacturers of American-made steel arch buildings, AgriBilt Building Systems delivers affordable, ...

I used a steel pick to force the holes into alignment ... This is an excellent building. Erecting this building by yourself is very difficult. It can be done, but the problems that result can ...

If you’re going to do it yourself ... readily available steel tubing, of the kind used for support columns in commercial buildings. Mounted to those are thick, precision-ground steel plates ...