Updated: April 2021

What does a 3E3X1 do?

Manages, constructs, repairs, and modifies structural systems and wooden, masonry, metal, and concrete buildings. Fabricates and repairs components of buildings, utility systems, and real property equipment. Ensures compliance with environmental regulations.

Where and How Long is the Tech School For a 3E3X1?

Tech School

90 Days - Gulfport, MS


Construction Technology

What Does the 3E3X1 Duty Badge Look Like?

Civil Engineer Badge

What are the Demographics for the 3E3X1 Career Field?







Total: 1589

What are the Requirements to Become a 3E3X1?


Mechanical: 47


70 lbs

  • Normal color vision.
  • Freedom from fear of heights.

What are the Duties and Responsibilities For a 3E3X1?

Prepares and interprets working drawings and schematics for maintaining, altering, and repairing buildings and structures. Surveys proposed work sites to determine material and labor requirements. Prepares cost estimates. Reviews structural work progress and coordinates changes in schedules. Constructs and repairs footings, floors, slabs, foundations, walls, roofs, steps, doors, and windows for prefabricated and permanent structures. Constructs and modifies buildings. Prepares, applies, and finishes mortar, concrete, plaster, and stucco. Fabricates repairs, and installs metal parts and assemblies for utility systems and buildings.

Erects steel and lays out trusses and structures to specific dimensions. Welds, cuts, brazes, and solders ferrous and nonferrous metals using various welding processes. Welds butt, lap, tee, and edge joints in all working positions. Inspects, maintains, repairs, and installs overhead and rollup doors, and mechanical gates. Installs forms and reinforcing material. Applies protective coatings such as primers, stains, and sealants.

Troubleshoots, repairs, and installs commercially manufactured locking devices such as keyed, combination, cipher, panic hardware/exit device, and pad locks.

Erects scaffolding and works from ladders and mobile platforms.

Identifies and selects construction materials considering strength, moisture content, grade, mix, application procedures, and curing.

Manages, inspects, and evaluates work center activities. Ensures compliance with commercial and military publications. Submits and reviews supply and equipment requisitions. Discusses inspection findings and recommends corrective action.

What Are the Specialty Qualifications for a 3E3X1?

Knowledge. Knowledge is mandatory of: building maintenance, repair, and construction, including roofing; nomenclature of woodworking materials and methods of material storage; theory of squaring by equivalent measurements; application of shop mathematics; theory of wood treatment; type and specification requirements of masonry products: masonry batching formulas; methods of curing masonry products; types of coating preservatives and applications; compatible products to be combined in composite systems; methods of preparing various surfaces for finishing; locking devices; composition, characteristics, and identification of common commercial grade metals; construction grade metal requirements; types and uses of metal hardware; methods of forming and cutting metals; metal layout fabrication and repair; welding processes; shop drawings; metal measurement and layout devices; cutting equipment; gas and arc welding equipment; safety procedures and practices; and environmental concerns and safety precautions required in using, storing, and disposing of hazardous materials.

Education. For entry into this specialty, completion of high school with courses in mathematics mechanical drawing, and use of metal, masonry and wood working tools is desirable.

Training. For award of AFSC 3E331, completion of a basic structural course is mandatory.

Experience. The following experience is mandatory for award of the AFSC indicated:

  • 3E351. Qualification in and possession of AFSC 3E331. Also, experience in functions such as constructing and repairing buildings and heavy structures; erecting prefabricated structures; laying masonry units; mixing, applying, and finishing masonry products; erecting steel; use of protective equipment; and fabricating, installing, and repairing metal components using gas or arc welding equipment.
  • 3E371. Qualification in and possession of AFSC 3E351. Also, experience performing or supervising functions such as laying masonry units; carpentry; constructing, erecting, maintenance, and repair of buildings and heavy structures; and planning, installing, repairing, welding, or forging metal components.

For more information on AFSCs and Shredouts check this article out!


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