# Layout Workers, Metal and Plastic > 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. - Code: 51-4192.00 (O*NET-SOC; SOC 2018 51-4192) - Family: [Production](https://foundation.org.ai/occupations#family-51), one of its 114 occupations - Tasks: 14 tasks (9 core and 5 supplemental) - Page: https://foundation.org.ai/occupations/51-4192.00 - JSON: https://foundation.org.ai/data/tasks/51-4192.00.json ## What the work is made of 1. Mark curves, lines, holes, dimensions, and welding symbols onto workpieces, using scribes, soapstones, punches, and hand drills. Core task · Task 10298 · Rated by 63 people who do the job, August 2018 2. Plan locations and sequences of cutting, drilling, bending, rolling, punching, and welding operations, using compasses, protractors, dividers, and rules. Core task · Task 10302 · Rated by 61 people who do the job, August 2018 3. Fit and align fabricated parts to be welded or assembled. Core task · Task 10295 · Rated by 63 people who do the job, August 2018 4. Locate center lines and verify template positions, using measuring instruments such as gauge blocks, height gauges, and dial indicators. Core task · Task 10300 · Rated by 62 people who do the job, August 2018 5. Plan and develop layouts from blueprints and templates, applying knowledge of trigonometry, design, effects of heat, and properties of metals. Core task · Task 10296 · Rated by 63 people who do the job, August 2018 6. Lay out and fabricate metal structural parts such as plates, bulkheads, and frames. Core task · Task 10297 · Rated by 63 people who do the job, August 2018 7. Compute layout dimensions, and determine and mark reference points on metal stock or workpieces for further processing, such as welding and assembly. Core task · Task 10299 · Rated by 62 people who do the job, August 2018 8. Lift and position workpieces in relation to surface plates, manually or with hoists, and using parallel blocks and angle plates. Core task · Task 10301 · Rated by 61 people who do the job, August 2018 9. Design and prepare templates of wood, paper, or metal. Core task · Task 10304 · Rated by 63 people who do the job, August 2018 10. Install doors, hatches, brackets, and clips. Supplemental task · Task 10307 · Rated by 63 people who do the job, August 2018 11. Brace parts in position within hulls or ships for riveting or welding. Supplemental task · Task 10305 · Rated by 63 people who do the job, August 2018 12. Inspect machined parts to verify conformance to specifications. Supplemental task · Task 10303 · Rated by 61 people who do the job, August 2018 13. Add dimensional details to blueprints or drawings made by other workers. Supplemental task · Task 10306 · Rated by 62 people who do the job, August 2018 14. Apply pigment to layout surfaces, using paint brushes. 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Nothing on this page is written by the Org.AI Foundation.