SAFE verdict contested
The core of this job — measuring in place, fabricating and hanging ductwork, flashing, and architectural panels in attics, plenums, rooftops and unfinished buildings — is physical work in spaces no current robot navigates. AI is already eating the front end: takeoffs, sheet nesting, CNC programming, BIM coordination drawings and cut lists that used to be layout hours. The modal worker is a field installer, and that tier is durable; shop-only fabricators who mainly drive plasma tables and press brakes face more pressure as nesting and machine setup automate.
This fall is concentrated in 2020 and has not recovered since.
Median pay $50,400 → $61,800 -1.9% in real terms
This line is counted by the Bureau of Labor Statistics — the one figure on this page that isn't a judgement of ours. Headcount moves on demand, offshoring, demographics and the business cycle, and automation is one term among several, often not the loudest.
So a falling line is not evidence that AI did it, and a rising one is not evidence that it won't. Both happen in this register: some occupations resist automation and shrink anyway, others are highly automatable and keep growing. The marked year is 2020.
BLS projection, 2024–2034
+2.4% 127,000 → 130,100 on the projections basis
Hard to automate, and growing
The work resists current AI and the BLS projects +2.4% more of these jobs by 2034. Note that safe does not mean well paid — several of the fastest-growing resistant occupations are among the lowest paid on the register.
Different clocks. The score is what current AI could do to this work today. The projection is how many of these jobs will exist in 2034. Everything between the two — how fast employers actually adopt, whether demand grows in the meantime — is why they can point opposite ways without either being wrong.
~10,600 openings a year on average, including replacing people who leave.
TinkerTinnerCowlmanTinsmithHood MakerMetalsmithTin WorkerWhitesmithBeam WorkerCoppersmithFairing ManAngle BenderMetal WorkerChute BuilderCornice MakerGutter HangerLayout WorkerDuct InstallerDural MechanicFairing WorkerField InstallerTemplate FitterExtrusion FormerGutter Installer
Holding it up: embodiment . Weakest point: liability shield .
Tasks largely resist digitisation Field measuring an as-built shaft that's 3/4 inch out of plumb, breaking a transition on a brake to fit it, and hanging it on trapeze hangers between existing sprinkler mains is sequential improvised work — the 16 rather than 19 reflects that layout, nesting and CNC cut lists, once a real part of the trade, are now generated upstream from the BIM model.
Hands-on in uncontrolled environments Crawling a 30-inch plenum, working off a scissor lift on a rooftop curb, screwing standing-seam panels in wind, and carrying 4x10 sheets up stairs in an unconditioned shell is the whole job — there is no version of this done from a chair.
Certification preferred, not legally required No state licence gates the trade; the 7 comes from what shops actually require — OSHA 10/30, welding and brazing certs, SMACNA and NFPA 90A duct standards you must build to, and the fact that the mechanical contractor's licence and the inspector's sign-off, not yours, carry the legal exposure on the smoke-damper installation you just made.
Meaningful discretion You decide on the spot how to reroute a main around an unmarked structural beam, whether a fitting can be field-modified or has to go back to the shop, and how to seal a fire-rated penetration when the detail on the drawing doesn't exist in the field — real calls with money and life-safety consequences, held below 14 because the foreman, engineer and RFI process own the ones that change the design.
The verdict above describes this occupation as a whole. Almost nobody does the typical version of a job — tick what's actually in your week and see how your own mix sits.
Your task mix speaks to task resistance (16/20 here) — how much of the day's work current AI already does. That is the dimension the boxes above are about.
It cannot move the other three. Liability shield (7/20) is whether the law requires a licensed human to sign. Trust premium (11/20) is whether buyers specifically pay for a person. Judgment and accountability (13/20) is whether the role exists to own consequential calls. Those are facts about the occupation's standing, not about which tasks are in your week — a paralegal who does only trial exhibits still holds no licence. Together they are 31 of this occupation's 67 points (46%).
Embodiment (20/20) is also a property of the work rather than the worker, but we don't tag individual tasks as physical or not, so the picker can't tell you anything about it. That's a limit of this tool, not a claim.
Did we get the list right? Tell us what's missing — the tasks are written from the outside, and you're reading this from the inside.
The moves above are yours to make. This is the other half: what would have to change in the world for the occupation itself to score higher. None of it is in any one person's gift, but it is where the floor actually comes from. Scores here are not a one-way ratchet. Only two of the five dimensions — task resistance and embodiment — track what machines can do. The other three track law, what buyers will pay for, and who is answerable, and those move in both directions, often in response to the same pressure AI creates. If every lever below landed, this occupation would score around 81/100, still SAFE.
Expansion of state/local licensing that ties life-safety sheet metal work to a certified individual signing off — e.g. smoke-control damper and grease duct (NFPA 96) installations requiring a certified installer's affidavit, or ICC/SMACNA-credentialed technicians required to sign TAB and duct-leakage test reports for energy-code compliance (already required in California Title 24 via HERS raters, and in some jurisdictions for smoke control special inspection under IBC 1705.18)
Task-mix shift as nesting, CNC programming and BIM coordination automate: the residual role concentrates on field verification of as-built conditions, hanger and seismic bracing decisions, and rework where the model conflicts with installed conditions — a genuine second tier that current AI cannot execute. Watch for shop headcount falling while field journeyman hours per project hold
Architectural metal and historic restoration work where owners specify hand-formed copper, zinc or standing-seam by named craftsmen (Secretary of the Interior standards work, preservation tax credit projects). Narrow slice of the occupation, not the modal duct installer
Fire/life-safety inspection regimes naming a credentialed person on the record: annual fire and smoke damper inspection (NFPA 80/105) performed and attested by a certified individual, adopted by more state fire marshals as an enforced requirement rather than a guideline
Field authority formalized in contract documents: BIM execution plans and prefab contracts naming the installing foreman as the party who authorizes deviation from coordinated models, with signed field change records — already appearing in large mechanical contractors' LOD 400 workflows
The limit. Embodiment is already maxed and cannot rise. The realistic ceiling is high-70s; the constraint is that most ductwork is commercial subcontract work bid on price, where no buyer pays for a named human and the general contractor, not the installer, carries the liability.
| New York-Newark-Jersey City, NY-NJ | 6,080 | $76,730 +24% |
| Dallas-Fort Worth-Arlington, TX | 2,890 | $56,240 -9% |
| Houston-Pasadena-The Woodlands, TX | 2,610 | $51,870 -16% |
| Phoenix-Mesa-Chandler, AZ | 2,550 | $51,230 -17% |
| Los Angeles-Long Beach-Anaheim, CA | 2,440 | $72,710 +18% |
| Chicago-Naperville-Elgin, IL-IN | 2,430 | $95,310 +54% |
| Minneapolis-St. Paul-Bloomington, MN-WI | 2,340 | $72,970 +18% |
| Boston-Cambridge-Newton, MA-NH | 2,330 | $82,550 +34% |
| Seattle-Tacoma-Bellevue, WA | 2,190 | $109,830 +78% |
| San Jose-Sunnyvale-Santa Clara, CA | 750 | $109,280 +77% |
| San Francisco-Oakland-Fremont, CA | 880 | $102,660 +66% |
We have no reported case of a named organisation automating this occupation. Not one deployment, not one announcement.
That is worth saying out loud next to a score of 67. The verdict above is about what the work exposes — what current AI could do to these tasks. It is not a claim that anyone has done it. For this occupation those two things have come apart completely: the capability argument is on this page, and the evidence column is empty.
Has AI actually changed your work? One tap, anonymous, and the running tally is public. Nothing else is asked of you.
Rather than check back: get the digest and we'll tell you what changed — or watch a single occupation from its own page.