Mark reference points on construction materials.

Mark reference points on construction materials. is a detailed work activity in O*NET — a concrete unit of work shared across 23 occupations and seen in 26 occupation-specific tasks. It rolls up into the broader work activity Position materials or components for assembly. in Handling and Moving Objects .

Detailed work activities are the most granular shared layer in O*NET's work-activity hierarchy (Generalized → Intermediate → Detailed → occupation-specific task). The figures below describe how this activity shows up across the economy and what independent studies measure about AI and this kind of work — not a prediction that the work will be automated.

AI exposure

Of the 26 tasks under this activity that the OpenAI / Eloundou “GPTs are GPTs” study rated, 7 (27%) are flagged as directly exposed to language models (E1) or exposed via model-powered tools (E2).

The Anthropic Economic Index observes real AI use on 1 of these tasks, with a mean mapped-usage share of 0.002% per task.

Exposure estimates overlap with model capabilities — whether a model could speed the task up — not whether the work will be done by software. Observed AI use is augmentation and assistance today, not jobs replaced.

Member tasks

Occupation-specific tasks O*NET maps to this detailed work activity, most important first.

• Measure distance from reference points and mark guidelines to lay out work, using plumb bobs and levels. · Brickmasons and Blockmasons · importance 4.7 · no direct exposure
• Measure and mark cutting lines on materials, using a ruler, pencil, chalk, and marking gauge. · Carpenters · importance 4.6 · no direct exposure
• Roll out, measure, mark, and cut carpeting to size with a carpet knife, following floor sketches and allowing extra carpet for final fitting. · Carpet Installers · importance 4.5 · no direct exposure
• Mark patterns, locations, and depths of charge holes for drilling, and issue drilling instructions. · Explosives Workers, Ordnance Handling Experts, and Blasters · importance 4.5 · no direct exposure
• Lay out wall patterns or foundations, using straight edge, rule, or staked lines. · Stonemasons · importance 4.5 · no direct exposure
• Measure and lay out fence lines and mark posthole positions, following instructions, drawings, or specifications. · Fence Erectors · importance 4.4 · no direct exposure
• Mark vertical guidelines on walls to align strips, using plumb bobs and chalk lines. · Paperhangers · importance 4.3 · no direct exposure
• Measure and mark surfaces to be tiled, following blueprints. · Tile and Stone Setters · importance 4.3 · exposure with tools
• Measure and mark surfaces to lay out work, according to blueprints or drawings, using tape measures, straightedges or squares, and marking devices. · Drywall and Ceiling Tile Installers · importance 4.2 · exposure with tools
• Locate and mark the position of pipe installations, connections, passage holes, or fixtures in structures, using measuring instruments such as rulers or levels. · Plumbers, Pipefitters, and Steamfitters · importance 4.1 · no direct exposure
• Perform tie spacing layout and measure, mark, drill or cut. · Helpers--Carpenters · importance 4.0 · no direct exposure
• Lay out pipe routes, following written instructions or blueprints and coordinating layouts with supervisors. · Pipelayers · importance 4.0 · exposure with tools
• Measure and mark guidelines on surfaces or foundations, using chalk lines and dividers. · Floor Layers, Except Carpet, Wood, and Hard Tiles · importance 4.0 · no direct exposure
• Lay out, measure, and mark dimensions and reference lines on material, such as roofing panels, using calculators, scribes, dividers, squares, or rulers. · Sheet Metal Workers · importance 4.0 · no direct exposure
• Install guide wires on exterior surfaces of buildings to indicate thickness of plaster or stucco and nail wire mesh, lath, or similar materials to the outside surface to hold stucco in place. · Plasterers and Stucco Masons · importance 4.0 · no direct exposure
• Design paver installation layout pattern and create markings for directional references of joints and stringlines. · Segmental Pavers · importance 4.0 · exposure with tools
• Locate, measure, and mark site locations or placement of structures or equipment, using measuring and marking equipment. · First-Line Supervisors of Construction Trades and Extraction Workers · importance 3.9 · exposure with tools
• Measure, mark, or record openings or distances to layout areas where construction work will be performed. · Construction Laborers · importance 3.9 · exposure with tools
• Measure and mark outlines or patterns on glass to indicate cutting lines. · Glaziers · importance 3.8 · exposure with tools
• Lay out plate, sheet steel, or other heavy metal and locate and mark bending and cutting lines, using protractors, compasses, and drawing instruments or templates. · Boilermakers · importance 3.7 · no direct exposure
• Hold plumb bobs, sighting rods, or other equipment to aid in establishing reference points and lines. · Helpers--Carpenters · importance 3.7 · no direct exposure
• Measure and mark locations for installation of markers, using tape, string, or chalk. · Highway Maintenance Workers · importance 3.7 · no direct exposure
• Locate and mark reference points for columns or plates on boiler foundations, following blueprints and using straightedges, squares, transits, or measuring instruments. · Boilermakers · importance 3.7 · no direct exposure
• Hang dry lines to wall moldings to guide positioning of main runners. · Drywall and Ceiling Tile Installers · importance 3.6 · no direct exposure
• Mark dimensions or outlines on stone prior to cutting, using rules and chalk lines. · Rock Splitters, Quarry · importance 3.4 · no direct exposure
• Set up forms and lay out guidelines for curbs, according to written specifications, using string, spray paint, and concrete or water mixes. · Paving, Surfacing, and Tamping Equipment Operators · importance 3.2 · no direct exposure

Occupations that perform this

• Brickmasons and Blockmasons
• Carpenters
• Carpet Installers
• Explosives Workers, Ordnance Handling Experts, and Blasters
• Stonemasons
• Fence Erectors
• Paperhangers
• Tile and Stone Setters
• Drywall and Ceiling Tile Installers
• Plumbers, Pipefitters, and Steamfitters
• Helpers--Carpenters
• Pipelayers
• Floor Layers, Except Carpet, Wood, and Hard Tiles
• Sheet Metal Workers
• Plasterers and Stucco Masons
• Segmental Pavers
• First-Line Supervisors of Construction Trades and Extraction Workers
• Construction Laborers
• Glaziers
• Boilermakers
• Highway Maintenance Workers
• Rock Splitters, Quarry
• Paving, Surfacing, and Tamping Equipment Operators

Sources for this page

Every figure above traces to a named public dataset and the exact release below — not hand-written opinion. See the full methodology for what each measure does and does not mean.

• O*NET 30.3 U.S. Department of Labor / National Center for O*NET Development
• Anthropic Economic Index v4 (2026-01-15) + v2 (2025-03-27) Anthropic
• “GPTs are GPTs” (Eloundou et al.) arXiv 2303.10130 OpenAI / academic

Data compiled June 2, 2026. Figures are estimates, not advice.

@misc{singulariki-mark-reference-points-on-construction-materials,
  title  = {Mark reference points on construction materials.},
  author = {{Singulariki}},
  year   = {2026},
  note   = {O*NET 30.3; Anthropic Economic Index v4 (2026-01-15) + v2 (2025-03-27); “GPTs are GPTs” (Eloundou et al.) arXiv 2303.10130. Accessed June 7, 2026},
  url    = {https://singulariki.com/detailed-activities/mark-reference-points-on-construction-materials}
}