Long ago, I did tech drawing in art school. On paper...
And I agree with Joojaa - technical drawings have certain standards, own language, terms and obey rules that are better found elsewhere. But if you mean "technical" drawings such as assembly instructions, IKEA-style, than I figure that is within scope.
But then that is illustrations, not really technical drawing. Technical drawings are - like botanic "illustration" (they are not really illustrations) - lightyears from graphic design. What I would like to see more of, however, is questions about illustrations as defined in the tag illustration. illustration.