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Army MOS · Engineering

12W Carpentry and Masonry Specialist

Current service use not established

This code is listed in the directory. Inclusion alone does not confirm current service use.

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Overview

A Carpentry and Masonry Specialist performs general heavy carpentry, structural steel, and masonry work. The specialist fabricates, erects, maintains, and repairs rigging devices, trusses, and other structural assemblies.

Minimum ASVAB: GM 88

ASVAB policy: Not policy-reviewed · coverage unknown · as of 2026-10-19

Program scope has not been reviewed.

Policy applicability and coverage of the program's score routes have not been reviewed. Shown-route arithmetic is not an eligibility decision.

Source: smartbook-611-21-ch10c-fy2025 (source date 2025-12). Policy applicability has not been established.

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Core Skills

  • Rigging device fabrication and repair
  • Truss fabrication, erection, and repair
  • Structural steel assembly and maintenance

Civilian Career Paths

Career associations are editorial assessments of the cited evidence, not an official crosswalk unless the evidence explicitly says so. O*NET supplies civilian occupation information, not proof of a military match. Related experience does not confer civilian qualifications. Tasks and tools below describe civilian work, not military training.

Carpenters

Heavy carpentry and truss fabrication, erection, and repair transfer directly to constructing building frameworks.

How to prepare: Practice laying out a framing project from building plans, determining dimensions and required materials.

What the civilian work involves
  • Measure and mark cutting lines on materials, using a ruler, pencil, chalk, and marking gauge.
  • Assemble and fasten materials to make frameworks or props, using hand tools and wood screws, nails, dowel pins, or glue.
  • Study specifications in blueprints, sketches, or building plans to prepare project layout and determine dimensions and materials required.

Structural Iron and Steel Workers

Military structural steel duties and work on rigging devices provide relevant experience for erecting and connecting steel structures.

How to prepare: Arrange hands-on practice connecting steel members with bolts and checking their alignment with levels or plumb bobs.

What the civilian work involves
  • Connect columns, beams, and girders with bolts, following blueprints and instructions from supervisors.
  • Fasten structural steel members to hoist cables, using chains, cables, or rope.
  • Verify vertical and horizontal alignment of structural steel members, using plumb bobs, laser equipment, transits, or levels.

Notes & Sources

Evidence for this guidance (3 documents)
  1. Army COOL MOC feed: 12W Carpentry and Masonry Specialist

    [1] data/authority/army-codes.json entry 12W (OSD COOL feed, fetched 2026-07-25); DB rank enlisted, authority codeType enlisted

    Supports: Rigging device fabrication and repair, Truss fabrication, erection, and repair, Structural steel assembly and maintenance, Carpenters (O*NET 47-2031.00), Structural Iron and Steel Workers (O*NET 47-2221.00)

  2. O*NET: Carpenters

    [2] O*NET 30.3 occupational data

    Supports: Carpenters (O*NET 47-2031.00)

  3. O*NET: Structural Iron and Steel Workers

    [3] O*NET 30.3 occupational data

    Supports: Structural Iron and Steel Workers (O*NET 47-2221.00)

Defense contractor jobs for 12W

Predecessor codes

Historical codes with documented links to 12W. Each history page explains the change.

12V1Concrete and Asphalt Equipment Operator (RC)12V2Concrete and Asphalt Equipment Operator (RC)12V3Concrete and Asphalt Equipment Operator (RC)21W1Carpentry and Masonry Specialist21W2Carpentry and Masonry Specialist

Descriptions may be summarized for clarity. Verify all information with your branch career counselor or official military documentation before making career decisions.

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