Raise, place, and unite iron or steel girders, columns, and other structural members to form completed structures or structural frameworks. May erect metal storage tanks and assemble prefabricated metal buildings .

Assemble hoisting equipment and rigging, such as cables, pulleys, and hooks, to move heavy equipment and materials. Bolt aligned structural-steel members in position for permanent riveting, bolting, or welding into place. Connect columns, beams, and girders with bolts, following blueprints and instructions from supervisors. Drive drift pins through rivet holes in order to align rivet holes in structural-steel members with corresponding holes in previously placed members. Erect metal and precast concrete components for structures such as buildings, bridges, dams, towers, storage tanks, fences, and highway guard rails. Fasten structural-steel members to hoist cables, using chains, cables, or rope. Force structural-steel members into final positions, using turnbuckles, crowbars, jacks, and hand tools. Hoist steel beams, girders, and columns into place, using cranes, or signal hoisting equipment operators to lift and position structural-steel members. Pull, push, or pry structural-steel members into approximate positions for bolting into place. Ride on girders or other structural-steel members to position them, or use rope to guide them into position. Unload and position prefabricated steel units for hoisting as needed. Verify vertical and horizontal alignment of structural-steel members, using plumb bobs, laser equipment, transits, and/or levels. Catch hot rivets in buckets, and insert rivets in holes, using tongs. Cut, bend, and weld steel pieces, using metal shears, torches, and welding equipment. Dismantle structures and equipment. Fabricate metal parts such as steel frames, columns, beams, and girders, according to blueprints or instructions from supervisors. Hold rivets while riveters use air-hammers to form heads on rivets. Insert sealing strips, wiring, insulating material, ladders, flanges, gauges, and valves, depending on types of structures being assembled. Place blocks under reinforcing bars used to reinforce floors. Read specifications and blueprints to determine the locations, quantities, and sizes of materials required.

Building and Construction -- Knowledge of materials, methods, and the tools involved in the construction or repair of houses, buildings, or other structures such as highways and roads. Mechanical -- Knowledge of machines and tools, including their designs, uses, repair, and maintenance.

Installation -- Installing equipment, machines, wiring, or programs to meet specifications. Equipment Selection -- Determining the kind of tools and equipment needed to do a job. Operation and Control -- Controlling operations of equipment or systems.

Depth Perception -- The ability to judge which of several objects is closer or farther away from you, or to judge the distance between you and an object. Static Strength -- The ability to exert maximum muscle force to lift, push, pull, or carry objects. Dynamic Strength -- The ability to exert muscle force repeatedly or continuously over time. This involves muscular endurance and resistance to muscle fatigue. Extent Flexibility -- The ability to bend, stretch, twist, or reach with your body, arms, and/or legs. Visualization -- The ability to imagine how something will look after it is moved around or when its parts are moved or rearranged. Peripheral Vision -- The ability to see objects or movement of objects to one's side when the eyes are looking ahead. Information Ordering -- The ability to arrange things or actions in a certain order or pattern according to a specific rule or set of rules (e.g., patterns of numbers, letters, words, pictures, mathematical operations). Gross Body Equilibrium -- The ability to keep or regain your body balance or stay upright when in an unstable position. Stamina -- The ability to exert yourself physically over long periods of time without getting winded or out of breath. Trunk Strength -- The ability to use your abdominal and lower back muscles to support part of the body repeatedly or continuously over time without 'giving out' or fatiguing.

Handling and Moving Objects -- Using hands and arms in handling, installing, positioning, and moving materials, and manipulating things. Performing General Physical Activities -- Performing physical activities that require considerable use of your arms and legs and moving your whole body, such as climbing, lifting, balancing, walking, stooping, and handling of materials. Controlling Machines and Processes -- Using either control mechanisms or direct physical activity to operate machines or processes (not including computers or vehicles). Inspecting Equipment, Structures, or Material -- Inspecting equipment, structures, or materials to identify the cause of errors or other problems or defects. Monitor Processes, Materials, or Surroundings -- Monitoring and reviewing information from materials, events, or the environment, to detect or assess problems. Communicating with Supervisors, Peers, or Subordinates -- Providing information to supervisors, co-workers, and subordinates by telephone, in written form, e-mail, or in person.