Ironworker Job Description

An Ironworker builds the part of a structure nobody sees once it is finished: the steel frame of an office tower, the girders of a highway bridge, the rebar mat inside a parking deck slab. BLS describes the job in one line, saying ironworkers install structural and reinforcing iron and steel to form and support buildings, bridges and roads. On a construction site, that work splits into several crafts.

The raising gang. Structural steel goes up in a fixed order. Anchor rods and base plates come first, set in the foundation by the concrete contractor or by ironworkers. Columns land on the rods, beams and girders tie the columns together at each level, and bracing squares the bay. On a raising gang, a hooker-on rigs each piece on the ground, a signal person directs the crane, and two connectors work at the top of the columns. The connectors catch each beam as it swings in, line up the holes with a drift pin, and run in enough bolts to hold it. A bolting crew follows to fill the rest of the holes and tighten them, and a plumb-up crew uses cables, turnbuckles and instruments to bring the frame into tolerance before the connections are made final.

Decking and the leading edge. Once a tier of steel is plumbed, ironworkers spread bundles of metal deck across the beams and fasten it down. That deck becomes the work platform for every trade that follows and the form for the concrete floor. OSHA's steel erection standard governs how this is done. Under 29 CFR 1926.760, a worker on a steel erection surface with an unprotected edge more than 15 feet above a lower level must be protected by guardrails, nets, personal fall arrest or a similar system. Connectors work under a different threshold: they must be protected from falls of more than two stories or 30 feet, whichever is less. A controlled decking zone can be no more than 90 feet wide and 90 feet deep, and unsecured decking inside it may not exceed 3,000 square feet.

Reinforcing work. Reinforcing ironworkers work from placing drawings that show bar size, spacing, laps and concrete cover. They set chairs, lay out bars in mats and cages, tie each intersection with wire, and set dowels for the next pour. A cage that is out of place cannot be fixed after the concrete goes in, so inspectors check bar placement before a pour.

Ornamental, precast and rigging. Other ironworkers install stairs, handrails, curtain wall anchors, storefronts and precast panels, and some rig and set heavy machinery in plants. BLS notes that most of the work is new construction, but some ironworkers help demolish, decommission or rehabilitate older buildings and bridges.

The common thread is the crane. When a piece of steel arrives on the hook, the crew's rigging and signals decide whether it lands where the drawing says or somewhere it should not.

Apprenticeship. BLS says many ironworkers learn the trade through a 3- or 4-year apprenticeship, with each year requiring at least 144 hours of related technical instruction and 2,000 hours of paid on-the-job training. Sponsors include unions and contractor associations, and nearly all programs teach both reinforcing and structural work. Completing one makes an apprentice a journey-level worker who may work without direct supervision. Other ironworkers learn through employer on-the-job training, which varies in length.

The Iron Workers International lists entry requirements that include a minimum age of 18, a high school diploma, GED or equivalent as the local training committee specifies, and being drug and alcohol free. The union directs applicants to their local union to learn about apprenticeship programs in their area. Math, blueprint reading and shop or welding classes in high school are useful preparation.

Credentials a reader would pursue:

• AWS Certified Welder (American Welding Society). A performance qualification for field welding on structural steel, deck and embeds.
• Rigger Level I and Signalperson (NCCCO). Third-party certifications for the rigging and crane signaling an ironworker does every day.
• OSHA 10-Hour Construction card (OSHA Outreach Training Program). Entry-level construction safety training taught by OSHA-authorized trainers; OSHA notes the card is not a certification.

Two federal rules turn some of that training into a condition of doing the work. OSHA's crane standard says the employer must make sure each signal person meets the qualification requirements before giving any signals, either through a third-party qualified evaluator or the employer's own qualified evaluator. And under the steel erection standard, a connector must have completed connector training under 29 CFR 1926.761.

Tooling. The Ironworker Management Progressive Action Cooperative Trust (IMPACT) lists a 4-day course in its 2024 annual report that teaches layout with robotic total station instruments made by Trimble and Leica. Ironworkers who handle layout, anchor rod surveys or column plumbing can pick up that work through courses like it.

What the work asks of a person. BLS lists the ability to work at heights, balance, depth perception, hand-eye coordination, physical stamina and strength. Fear of heights rules a person out of connecting and decking, though rebar and some ornamental work stay closer to the ground. Comfort reading shop drawings matters as much as the physical side: an ironworker who can spot a wrong piece mark before it is hoisted saves the crew an hour.

As a rough guide, a journeyman with five or more years on a crew may be asked to run a gang as foreman, and a few go on to general foreman or superintendent roles with an erector. Welding, rigging and signaling certifications, plus a clean safety record, give a foreman reasons to trust a worker at the top of the columns.

BLS projects that overall employment of ironworkers will grow 1 percent from 2025 to 2035, slower than the average for all occupations. The occupation held about 84,800 jobs in 2025. The two halves of the trade diverge in the new projections: structural iron and steel workers are projected to grow 3% over the decade, while reinforcing iron and rebar workers are projected to decline 5%. Despite that limited growth, BLS expects about 6,800 openings for ironworkers each year on average, most of them from workers who move to other occupations or leave the labor force, including retirements.

What drives the work. BLS ties future demand to two things. Steel and reinforced concrete are central to commercial and industrial buildings, and that construction is expected to keep requiring ironworkers. The need to fix, maintain or replace a growing number of older highways and bridges is also expected to add jobs. That means an ironworker's year depends on the local mix of nonresidential building, industrial plant work and public infrastructure lettings.

Who hires. Among structural iron and steel workers, foundation, structure and building exterior contractors accounted for 47% of jobs in 2025, nonresidential building construction 19%, manufacturing 10% and heavy and civil engineering construction 6%. For reinforcing workers, foundation and structure contractors held 55% and self-employed workers 18%. Union ironworkers are dispatched from a local hall to signatory erectors and rebar contractors, so work can move between employers from one job to the next.

Schedule and conditions. BLS notes that structural ironworkers working at great heights do not work when conditions are wet, icy or extremely windy, and that rebar crews may be limited by precipitation. Workers may also have to travel to jobsites. A season of bad weather costs hours, which matters in a trade paid by the hour.

Robots on the bridge deck. The automation described in the sources for this page is aimed at rebar on bridge decks. Advanced Construction Robotics markets TyBOT, an autonomous rebar-tying robot built for bridge deck applications. On the question of who runs the machines, ENR reported in June 2023 that the Iron Workers director of reinforcing ironworkers pointed to a 2019 U.S. Department of Labor determination that robots tying rebar is an evolution of existing tools and methods used by reinforcing ironworkers, which, as the union described it, means work done with the robots is to be performed by workers classified as reinforcing ironworkers. None of the sources reviewed for this page describe a comparable machine for connecting, rigging or plumbing up structural steel.

Advancement. After gaining experience, ironworkers may move up to supervisor or manager, directing other ironworkers. Beyond the foreman's job, the paths lead to general foreman, erection superintendent, safety roles with an erector, or estimating and project management in the office. Some ironworkers become apprenticeship instructors for their local, and others specialize in heavy rigging, bridge work or industrial maintenance where the lifts are complex and the crews are small.

Dear Hiring Manager,

I am applying for the journeyman ironworker opening on your steel erection crew. I finished my apprenticeship with my local two years ago and have spent the time since on a raising gang, first bolting up and plumbing, and for the last year connecting on a six-story hospital addition and a parking structure.

On the hospital job I worked the top of the columns with a partner I trusted, catching beams off a crawler crane and making the frame safe before the hook let go. Our gang kept a steady pace without a recordable injury, and I credit that to the habits the foreman drilled into us: check the piece mark before the load leaves the ground, keep the tag lines tended, and never set down a beam that has not been made safe.

I hold welding certifications for flat and vertical structural work and have signaled cranes for deck bundles and steel picks. I am comfortable reading erection drawings and column schedules, and I have caught more than one wrong piece in the shakeout before it went up. When the crew moved to decking, I helped run the leading edge and set perimeter cable as each floor closed in.

I would like to bring that experience to your crew and keep learning heavier rigging, especially multiple-crane picks and industrial setting work. I can start on short notice, I have my own tools and gear, and I am willing to travel for the right project.

Thank you for your time. I would welcome a chance to talk with your superintendent.

Sincerely, Daniel Reyes