In construction and home building, feet and inches (at least in the US) aren't typically used -- instead, just inches are used. Most blueprints simply have inches, then halves, quarters, eighths, or ...

I use PTC Creo to draw sheetmetal parts for laser cutting and when I do more complicated signs I import a dxf into a sketch, then create a planar feature and project the sketch as a cutout in the ...