Lay out reference points and dimensions on metal or plastic stock or workpieces, such as sheets, plates, tubes, structural shapes, castings, or machine parts, for further processing. Includes shipfitters.
<ul><li>Mark curves, lines, holes, dimensions, and welding symbols onto workpieces, using scribes, soapstones, punches, and hand drills.</li><li>Fit and align fabricated parts to be welded or assembled.</li><li>Plan locations and sequences of cutting, drilling, bending, rolling, punching, and welding operations, using compasses, protractors, dividers, and rules.</li><li>Locate center lines and verify template positions, using measuring instruments such as gauge blocks, height gauges, and dial indicators.</li><li>Plan and develop layouts from blueprints and templates, applying knowledge of trigonometry, design, effects of heat, and properties of metals.</li><li>Lay out and fabricate metal structural parts such as plates, bulkheads, and frames.</li><li>Compute layout dimensions, and determine and mark reference points on metal stock or workpieces for further processing, such as welding and assembly.</li><li>Lift and position workpieces in relation to surface plates, manually or with hoists, and using parallel blocks and angle plates.</li><li>Design and prepare templates of wood, paper, or metal.</li></ul>