At some point along their journey, most tradespeople encounter technical drawings. These drawings constitute an important communication between those who work in offices, such as engineers and project managers, and those who work on the shop floor, such as welders and machinists. Typically, technical drawings contain at least a front, a top, and a side view. More complex fabricated items often receive detailed treatment, including multiple views. In addition, technical drawings for welded products use welding symbols, a standardized code for specifying the type and size of a weld, along with information about its finish. In this chapter, I discuss research on how people learn to use technical drawings. In doing so, I draw from my conversations with employees at Vermeer, Power Brace, and other shops that I visited. I also draw from my experiences at Howe’s, where we encounter technical drawings of all sorts, from sketches on notebook paper to computer-assisted drawings.