The Crew Behind the Icon: How Big a Skilled-Trades Army It Would Take to Build America’s Landmarks Today

It took fewer than 100 people to raise the 630-foot Gateway Arch, a crew smaller than the staff of one large restaurant. It took 3,439 to stand on the Empire State Building on its busiest single day. Same century, same country, roughly the same idea, wildly different crews. We pulled apart the labor records of eight American landmarks to ask a plain question: how many skilled tradespeople would it take to build each one today, and which trades carry the load. Across almost all of them the answer comes down to two trades that keep showing up, ironworkers and the masonry trades. Some of these crews were counted carefully at the time. Others were never counted at all. Where the record is thin, we say so rather than fill the gap with a guess.

Disclosure

Rinvio is a skilled-trades staffing company, so we have a commercial interest in the trades named here. The historical figures on these cards come from public records: the National Park Service, the U.S. Army Corps of Engineers, the ASCE Metropolitan Section, official project fact sheets, and cross-checked secondary reporting. We cite sources inline and list them at the end. Every modern crew size, labor-hour figure, and rebuild cost is an illustrative estimate, not a quote or a bid. We encourage you to check the Sources list and verify anything that matters to you.

How we built these numbers

Two kinds of numbers appear on every card, and we keep them apart. Historical figures (original cost, timeline, peak headcount, and where they exist, per-trade counts) come from public records: the National Park Service, the U.S. Army Corps of Engineers, the ASCE Metropolitan Section, project fact sheets, and cross-checked secondary reporting. We cite the source inline and label each historical count as either documented or, where the record is thin, an estimate. Some crews are documented in detail. The Empire State Building has a ten-trade breakdown traceable to project records; the Washington Monument has a stonecutter ramp of 40 to 62 to past 100 in the Corps of Engineers history. Others were never tallied. Where no headcount or labor-hour figure was ever recorded, the card says so.

Modern figures (crew size, labor-hours, and build cost) are illustrative estimates, not quotes or bids. We build them three ways: a documented scale-up from the original per-trade counts where they exist; a per-square-foot labor model checked against published construction-productivity benchmarks; and a build-cost model using current published cost-per-square-foot ranges, anchored to real comparable projects (for example, 50 Hudson Yards at $3.9 billion for 2.9 million square feet). One caveat governs the inflation-only figures throughout, so read it here once. A CPI adjustment of an old cost is a price-level floor, not a rebuild price. It ignores construction-cost escalation, current material prices, and modern code and safety requirements, all of which push a real rebuild well above the inflation line. On the cards below, when we call a CPI number a floor, that is the reason.

The Empire State Building

Start with the men on the steel. The riveters throwing hot steel a thousand feet up were disproportionately Mohawk ironworkers from Kahnawake, a community that sent high-steel gangs to nearly every skyscraper job of the era. They worked the open frame here, on the Chrysler Building, at the Gateway Arch, on the Space Needle, and their descendants are still on the steel at the Sphere. Across these eight builds, the sky boys are the closest thing to a recurring cast. On this one they left a trail of numbers behind them, because this is the best-documented crew on any of these cards.

All ten counts below trace to a single upstream source, the ASCE Metropolitan Section landmark page, which draws on project records. They sum to 2,359, leaving a balance of roughly 1,041 to 1,141 workers across about 50 other trades plus support staff. Combined, the masonry trades run past a thousand workers, the single largest group on the building.

• Brick laborers, the hod carriers and masons' tenders: 384
• Arch and masonry laborers: 328
• Bricklayers: 290, laying about 10 million bricks
• Steelworkers and ironworkers, the sky boys: 285, riveting the 57,000-ton frame
• Elevator installers: 249, on about 73 elevators and roughly 1,172 miles of cable
• Carpenters: 225, on formwork, hoist timber, and finish work
• Heating and ventilation installers: 194
• Plumbers: 192, on water, waste, and gas piping
• Derrick operators and operating engineers: 107
• Electricians: 105, pulling about 2 million feet of wire
• Balance of about 50 other trades and support: roughly 1,041 to 1,141 (estimate, computed as peak minus the ten documented trades)

The numbers survived because the pace turned the build into a public spectacle. The frame climbed at roughly 4.5 stories a week, with 14 floors erected in a single 10-day stretch, and during foundation work two 12-hour shifts of about 300 men each ran around the clock. Excavation began January 22, 1930. The first steel column was set March 17, the steel topped out September 19 twelve days ahead of schedule, the structure was completed April 11, 1931, and the tower opened May 1, about 13.5 months from the first shovel. More than 3,500 workers were on hand at the overall peak; the 3,439 counted on August 14, 1930 is the figure we lead with because it is dated and traceable. All told the project ran to roughly 7 million man-hours, about 2.53 per gross square foot across its 2,768,591 square feet. The building cost $40.9 million in 1930-31.

Rebuilding it today is guesswork, but bounded guesswork. A masonry-clad, landmark-quality supertall on a cramped Midtown site prices at the top of the range. The shell alone would run about $1.8 billion at roughly $660 a square foot and about $2.8 billion near $1,000, applied to the 2.77 million gross square feet. Then come soft costs, financing, escalation, and the Manhattan premium, and the number lands at $3 to $4 billion. For scale, 50 Hudson Yards next door, a 2.9-million-square-foot tower, cost $3.9 billion. Model the labor at 2.0 to 3.5 hours per square foot and you land between 5.5 and 9.7 million hours, with 7 million a reasonable midpoint. Scaled to a modern crew, the masonry trades still lead, with ironworkers close behind and laborers filling out the rest.

• Masons and tenders: 400 to 670
• Ironworkers: 180 to 285
• Carpenters: 150 to 225
• Elevator installers: 120 to 250
• HVAC and mechanical: 150 to 250
• Plumbers and pipefitters: 150 to 220
• Electricians: 120 to 250
• Operating engineers: 60 to 110
• Laborers and all other trades: 800 to 1,200

The Statue of Liberty

Most of the statue was built in Paris before a single piece reached New York. The full 151-foot figure was assembled at the Gaget, Gauthier & Cie workshop from roughly 1881 to 1884, after her arm and torch had appeared at the 1876 Philadelphia Centennial and her head at the 1878 Paris Exposition. She was presented July 4, 1884, then broken back down into about 350 pieces packed in 214 crates and shipped aboard the Isère, which reached New York June 17, 1885. One crew was actually counted through all of this, the workshop staff in Paris: about 50 to 60-plus skilled coppersmiths and metalworkers who raised the repoussé skin. That is the single counted crew on the card. The ironworkers who set the roughly 1,350 puddled-iron armature bars and the roughly 125-ton framework on the Eiffel-Koechlin pylon, the masons on the pedestal, the riggers on the island, none of them were numbered.

On Bedloe's Island the pieces went back together with nothing scaffolded around her. Steam derricks lifted each of the roughly 350 pieces into place while workers hung the copper skin from the inside out, riding the armature up as she rose. Reassembly took about four to six months. For a figure this size in the 1880s, building her naked, with no external cage, was a rigging job most crews would not have attempted. Meanwhile the pedestal went up inside Fort Wood between 1883 and 1886, and the statue was dedicated October 28, 1886. Its combined statue-plus-pedestal cost is a range of roughly $300,000 to $600,000 in 1880s dollars, which the NPS puts at about $17 to $22 million today.

The story that nobody died building the Statue of Liberty is false, and the correction is the spine of who these workers were. Francis Longo, a 39-year-old laborer, was killed when an old wall fell on him during pedestal-era work. The no-deaths claim traces to a dedication-day statement by General Charles P. Stone, and the build was celebrated for decades as a project that took no lives. It took at least his, a general laborer of the kind that filled out the reassembly crew, many of them new immigrants, none of them tallied. No complete fatality count was ever audited, so there may be others we cannot name.

A faithful, code-compliant rebuild today runs an illustrative $150 to $250 million, with a point estimate near $200 million: custom repoussé copper skin, an engineered stainless-steel armature, a marine foundation and pedestal, and monumental rigging. No source publishes a build-it-new price, so this is engineering judgment anchored on real modern spends, the 1980s restoration at about $39 million (roughly $96 million today), the 2019 museum at more than $70 million, and the 2022 Fort Wood foundation contract at $22 million. Our labor model puts the whole job near 420,000 hours, somewhere between 350,000 and 500,000, worked by an estimated crew of coppersmiths and sheet-metal artisans 25 to 35, structural and ornamental ironworkers 20 to 30, masons and concrete workers 15 to 25, operating engineers and riggers 8 to 12, general laborers 15 to 25, and engineers, surveyors, and safety and QA staff 6 to 10, for a peak of about 90 to 110.

The Chrysler Building

The 90-minute spire raise is why anyone remembers the build. Workers assembled the 185-foot spire in pieces inside the building's own fire shaft, out of sight of the rival team downtown racing for the same record. On October 23, 1929, they raised it through the dome in about 90 minutes. When it locked into place the Chrysler Building stood 1,046 feet, the tallest in the world by 119 feet over the Bank of Manhattan, and nobody outside the crew had seen it coming. That secret and the race behind it are the best-documented thing about the labor on this building, which is a problem, because almost nothing else about the crew was written down.

The rest of the build ran about 20 months around that stunt. William Reynolds's site, lease, and plans were acquired by Chrysler for more than $2.5 million on October 15, 1928. Superstructure work began January 21, 1929, and the steel topped out near the end of September 1929 at roughly four floors a week. It opened to the public May 27, 1930. The finished building was appraised at $14 million. No primary source fixes a total construction cost, and the widely repeated $15 to $20 million is a reported estimate, not a documented number.

Here the crew record thins out sharply. The roughly 3,000-worker peak (some sources say 3,000 to 4,000) is a popular estimate with no primary citation, and no trade-by-trade split appears to survive anywhere. What survives is material scale: 20,961 tons of steel, 391,881 rivets, about 3,826,000 hand-laid bricks, and 3,862 windows. The high-steel gangs again included Mohawk skywalkers from Kahnawake and Akwesasne, though no one wrote down how many. A faithful ground-up replica would run about $1.5 billion at the conservative floor and $2 billion or more for the ornamental detail, an order-of-magnitude estimate drawn from replacement-cost commentary, a $600 to $700 million systems-upgrade estimate, and comparable supertalls such as One World Trade Center at about $3.9 billion. Modeled on the 1,196,958 gross square feet, the labor lands at roughly 1.3 to 1.7 million hours, or about 1.5 million.

The split below only apportions the popular 3,000-worker peak across a typical high-rise trade mix. It is illustrative, because no historical per-trade counts exist:

• Structural steel and ironworkers: 350 to 450
• Masonry and bricklayers: 400 to 500, scaled to the roughly 3,826,000 hand-laid bricks
• Concrete and foundation: 250 to 350
• Electricians: 300 to 400
• Plumbers and mechanical (HVAC): 300 to 400
• Elevator installers: 40 to 70
• Carpenters, finishes, ornamental metal, and other trades: 800 to 1,000, including the custom Nirosta stainless ornament

The Washington Monument

In July 1880 there were 40 stonecutters on the Washington Monument payroll. By the end of August there were 62; by year's end, past 100, with Lt. Col. Thomas Lincoln Casey planning for as many as 120. That single-year ramp drove everything, because the men dressing marble were the whole reason the shaft finally rose, and the stonecutters stayed the through-line from the first crew to the last.

For twenty-two years before that ramp, the monument was a 152-foot stump. The cornerstone was laid July 4, 1848; the first phase reached about 152 feet by 1854 before private funds ran out; and the stub sat idle through the Know-Nothing takeover and the Civil War. Congress appropriated $200,000 to resume on August 2, 1876. Casey of the Army Corps of Engineers took charge in 1878 and first underpinned the inadequate foundation, a phase that peaked at 175 men in 1879. The shaft-building phase then ran 1880 to 1884 and peaked at about 170. The first phase, decades earlier, had reached 57 regular workmen by December 1849. No single lifetime or cumulative headcount was ever compiled, because the workforce rose and fell with funding and stone deliveries.

Thanks to the Corps of Engineers history, the trade shape of those crews is one of the better records we have.

• Stonecutters (marble and granite): 40 in July 1880, 62 by August, past 100 by year end; Casey planned for up to 120. The dominant trade.
• Laborers: 33 in December 1849, and the second-largest group at the 1880-84 peak (the peak count itself was never tabulated).
• Stonemasons and stone setters: 14 in the initial 1848-49 crew, about 15 by December 1849 (1880-84 count not tabulated).
• Carpenters: 4 in the initial 1848-49 crew, present but not tabulated later.
• Riggers: 1 in the initial crew, 6 in Casey's 1878 prep crew.
• Blacksmiths: present in both phases, peak count not tabulated.
• Engine drivers, machinists, and firemen (the operating-engineer equivalents): present in the 1880-84 crew, counts not tabulated.
• Watchmen: 2 in December 1849.
• Electricians and plumbers: not part of the original construction; interior electric lighting came around 1900.

The cast-aluminum apex was set December 6, 1884, the monument was dedicated February 21, 1885, and it opened to the public October 9, 1888. The full 1848-1888 build cost $1,409,500 ($1,187,710 through the 1884 completion). A straight inflation adjustment of the $1,409,500 nominal cost comes to about $40 million in 2024 dollars, but that number only follows the price level; a true hand-dressed-marble reconstruction to modern code would realistically cost several times as much, an illustrative $150 to $400 million. For a reality check, the 2012-14 post-earthquake restoration, repairs only, cost about $15 million. A modern crew scaled from the counts would run stonemasons and stonecutters 100 to 120 (anchored to Casey's own 120-stonecutter calculation), general laborers 30 to 40, riggers and operating engineers 8 to 12, ironworkers for the interior stair and elevator structure 6 to 10, blacksmiths and tool maintenance 3 to 5, carpenters 4 to 6, and the modern additions with no original counterpart, electricians 4 to 6, plumbers 2 to 4, and supervision, engineering, and safety 5 to 8. But the number that lasts is the human one: 40 men cutting marble in July who were past 100 by Christmas.

The Lincoln Memorial

Follow the marble and you follow the whole build. It started in Colorado, at the Yule quarry and mill that supplied the stone and fashioned 418 marble drums for the columns, each drum weighing 26.25 tons. That operation employed about 125 at its peak, which is the clearest workforce figure attached to the memorial, and it sat hundreds of miles from the Mall. From there the stone traveled east to a 36-plus-2 Doric colonnade rising on a foundation that ran deep, 122 pipe piles to bedrock roughly 50 feet down. The 19-foot Lincoln itself took a different road: the Piccirilli Brothers carved it from Georgia marble in a Bronx workshop, the six brothers plus workshop staff, with named carvers Ernest C. Bairstow and Evelyn Beatrice Longman on the architectural work, then assembled it on site in late 1919 and early 1920.

The build took about eight years around that stone. Ground was broken February 12, 1914, on Lincoln's 105th birthday; the foundation was completed in 1915 and the cornerstone laid February 12, 1915; the stone superstructure and colonnade went up between 1915 and 1917; the First World War slowed the work with worker and material shortages; and the memorial was dedicated May 30, 1922. The cost was $3,045,400 in period dollars, $2,957,000 for the building plus $88,400 for the statue, which adjusts to about $51 million in 2022 dollars.

Nobody left a payroll for the on-site workforce. No reputable source gives a peak crew size, per-trade headcounts, or total labor-hours for the memorial, and the documented facts all sit at the edges of the build: the quarry count, the pile foundation, the statue shop. On fatalities, the record shows none documented rather than a certified zero, since no complete casualty count was accessible. Past those edges the on-site trades go dark. Pile drivers, operating engineers, and concrete laborers sank the foundation. Stonecutters and marble setters dressed and placed the stone. Ironworkers, electricians, plumbers, carpenters, and crane operators raised and fit the temple. The record names a handful of them and counts almost none.

A from-scratch rebuild of the temple and colossus runs an illustrative $400 million, well above the $51 to $58 million inflation floor. That gap is deliberate. The estimate reflects reopening custom multi-state marble quarrying, hand-fashioning about 418 26-ton column drums, a deep pile foundation on poor reclaimed-swamp soil, and a hand-carved 19-foot statue, work effectively non-reproducible at 1920s prices. As a modern federal-monument reference, the 2010-12 Reflecting Pool reconstruction cost $30.74 million and the 2025-26 pool renovation now exceeds $16 million, though neither is a temple rebuild. Modeled out, the temple and its colossus would swallow 1.8 to 2.2 million labor-hours, worked by a modern crew of about 150: foundation and concrete crew about 30, on-site marble masons and setters about 45, off-site quarry cutters and mill hands about 40, sculptors and carvers about 12, and general trades about 20. Most of that cost is the two things you cannot shortcut: the hand-quarried Yule marble and the 19-foot Lincoln, carved by hand from Georgia marble in a Bronx shop and set inside the temple the stone built.

The Gateway Arch

The insurers who priced the job expected it to kill 13 workers. It killed none. That clean record, zero deaths against 13 expected in the pre-OSHA era, is the most surprising number on the card, and it belonged to a startlingly small crew. Period reporting put the on-site headcount at fewer than 100 workers as of June 1964, raising a 630-foot monument. Some NPS-sourced accounts describe a few hundred workers over the life of the project; we use the well-cited lower framing as the conservative figure.

Five union trades plus the general contractor built the Arch. Some crew sizes are documented; the per-trade totals are estimates:

• Ironworkers (Iron Workers Local 396): a documented 7-man raising gang per creeper derrick, two derricks, plus connectors and welders (crew size per derrick documented, total an estimate).
• Boilermakers (Local 659): off-site fabrication at Pittsburgh-Des Moines Steel, which built about 80 percent of the 142 sections (role and share documented, headcount an estimate).
• Elevator Constructors (Local 3): installed the unique tram and elevator system in the legs.
• Cement and concrete masons: placed the prestressed concrete filling the double skin up to about 300 feet.
• Electricians (IBEW): power, lighting, and tram controls.
• Operating engineers, carpenters, and laborers (MacDonald Construction): ran the two 100-ton creeper derricks, formwork, and general labor, roles inferred rather than broken out by number.

The Arch went up in about two and a half years, fast for a 630-foot monument. Construction began February 12, 1963, and the final keystone section was set October 28, 1965. MacDonald Construction Co.'s winning bid was $11,442,418, cut roughly $500,000 from an initial $11,923,163, against a $13 million total building cost. No total labor-hour figure for the historical build was ever recorded. For a defensible modern headline, the Arch operator's own figure is roughly $130 million today, which brackets Wikipedia's $98.4 million 2024-CPI conversion and DOZR's $200 million; all three are inflation proxies. A genuine present-day rebuild would run an illustrative $300 to $450 million once you account for construction-cost escalation, current stainless-steel prices (about 900 short tons of quarter-inch stainless is a major commodity line), and the modern OSHA rigging, fall protection, and insurance overhead the 1960s build largely skipped. The build would burn an estimated 500,000 to 700,000 labor-hours, and a modern crew would run ironworkers 20 to 30, off-site steel fabricators 30 to 50, concrete and post-tensioning 10 to 15, operating engineers 8 to 12, electricians 10 to 15, elevator constructors 6 to 10, carpenters and laborers 20 to 30, and safety, QA, and engineering 15 to 25, a category that barely existed on the original build.

The Space Needle

They called it the 400-day wonder, and secondary reporting pins the run at 407. Excavation began April 17, 1961, the structure topped off with a gas-torch spire December 8, 1961, and the tower opened just before the Century 21 Exposition on April 21, 1962. Inside that sprint sits the single feat the build is known for: the foundation went in as one continuous 12-hour pour of 467 ready-mix trucks, about 2,800 cubic yards, the largest continuous building concrete pour in the West at the time. The all-in development and construction cost was $4.5 million, with a separate $75,000 paid in 1961 for the 120-by-120-foot lot. The safety record is clean: zero construction fatalities, and this despite crews working without harnesses, with secondary accounts citing a broken leg as the worst injury. Three later deaths from the finished observation deck were suicides, not construction fatalities.

The original crew was almost entirely uncounted, and the shape of that record is its own kind of story. One trade figure survives, 39 welders, and everything else has to be read off the work. Ironworkers and structural steel erectors were on the frame at a documented $3.92 an hour, a wage with no headcount beside it. A custom Pacific Car and Foundry derrick crane operated from inside the 11-foot hollow core while signalman Jim Torrey radioed the operator, so operating engineers and a signalman were on the payroll, unrecorded. Howard S. Wright's crews placed the record 467-truck pour. Electricians, carpenters, plumbers, masons, and elevator fitters all had to be there. Not one of them was tallied.

The cleanest modern figure is a CPI inflation of the $4.5 million: about $50.3 million (BLS CPI), so about $50 million. A real turnkey rebuild would likely run higher, roughly $65 to $90 million, once you add prevailing wages, OSHA-compliant rigging, far stricter seismic code, insurance, and Seattle-market escalation; that higher band is an estimate. The owner's own comparator, the 2017-18 Century Project renovation at $100 million with the owners noting you could build almost three Space Needles for that, is broadly consistent with the CPI anchor. The labor model lands near 130,000 hours, and the band around it is wide. A modern crew would run ironworkers 25 to 40, welders about 39 (anchored to the one documented count), operating engineers 6 to 10, concrete and foundation crew 30 to 50 on pour day, and combined electricians, plumbers, elevator installers, HVAC, carpenters, glaziers, and finish trades 40 to 70 at fit-out peak. The roughly 100-worker headcount is anchored to the owner-reported 100-to-170-per-day figure from the 2017-18 renovation and is explicitly illustrative, not the original crew.

The Sphere (Las Vegas)

This is the one build on the list where the total is known and the trades are not, the exact inverse of the older cards. About 1,400 tradespeople were counted on site at the May 2022 topping-off, with a projected peak near 1,500, up from about 400 at the start. That aggregate is solid. The trade-by-trade split is not, because the historical build published only the total. So we lead with the number that survives and the load it points to. It is a genuinely hard build, the largest spherical structure on Earth, with a self-supporting geodesic Exosphere and a 5,000-ton steel lattice erected bolted to within an inch of ideal geometry. Total project steel ran to about 28,000 tons, including 368 cast-steel nodes across 21 types, 1,320 tons combined.

The Sphere broke ground September 27, 2018, topped off its dome roof June 18, 2021, topped out the steel Exosphere May 24, 2022, first illuminated its exterior LED July 4, 2023, and opened September 29, 2023 with U2. The final cost was about $2.3 billion, up from an initial estimate near $1.2 billion, with escalation traced to pandemic delays, materials inflation, and evolving LED scope. It was the most expensive entertainment venue built at the time. Separately, about 3,000 people staff the finished venue. On safety, no construction deaths are documented, an absence of records rather than a certified zero, since Nevada OSHA files were not pulled; the one notable on-site incident was a non-fatal 2019 fall, and the Las Vegas ironworker who died in September 2023 was killed at a separate F1 grandstand project, not at the Sphere.

The split below is illustrative for a modern rebuild, since the historical build published only the aggregate; a reader who worked the actual jobsite is welcome to argue their own trade's number:

• All trades, aggregate: about 1,400 documented at topping-off, about 1,500 projected peak (aggregate only).
• Ironworkers: 250 to 400 at steel-erection peak, erecting the roughly 5,000-ton Exosphere lattice, the 3,000-ton dome, and 368 cast nodes.
• Electricians and low-voltage/LED techs: 200 to 350 during fit-out, on about 580,000 square feet of exterior LED and 160,000 square feet of interior LED.
• Laborers: 200 to 300.
• Carpenters and concrete: 150 to 250, on 110,000 cubic yards of excavation and about 6,000 cubic yards of roof concrete.
• Operating engineers: 80 to 150.
• Plumbers and MEP: 150 to 250, on the full mechanical scope.

What makes this card different is where the weight sits. The exterior LED alone runs to roughly 1.2 million pucks, and that heavy electrician and low-voltage load is exactly the demand that ties into the broader trades-shortage picture we covered in our look at the electrician shortage and the data center boom. On the older builds the frame trades led. Here the load has shifted to the electricians and the LED techs. A U.S. rebuild in 2026 dollars runs an illustrative $2.6 to $2.7 billion, escalating the $2.3 billion by roughly 15 percent cumulative U.S. construction inflation, bracketed by the roughly $1.7 billion contract for a full-scale Sphere Abu Dhabi awarded in May 2026. The labor runs to roughly 8 to 11 million hours, on a build with no flat walls and no real precedent.

The eight crews at a glance

Crew size tracks how a thing is built, not how tall or how costly it is. A tower full of floors to wire, pipe, and wrap needs thousands of hands. A hollow stainless arch needs a fraction of that, however high it climbs.

Peak-crew figures marked with an asterisk are estimates rather than tallied records. Modern costs are illustrative models, not quotes. See the Methodology section above for how each number was built.

The trade that runs through nearly every card

Two threads run through almost all eight builds: ironworkers and the masonry trades. Ironworkers, many of them Mohawk skywalkers from Kahnawake and Akwesasne, show up on the Empire State Building, the Chrysler Building, the Gateway Arch, the Space Needle, and the Sphere. The stone and masonry trades dominate the Washington Monument, where stonecutters ramped past 100 as the single largest group, and the Lincoln Memorial. They are also the largest documented group on the Empire State Building, where 384 brick laborers, 328 arch laborers, and 290 bricklayers add up to more than a thousand masonry workers.

Whether the icon is a 1931 supertall or a 2023 sphere, the same two jobs anchor the crew: ironworkers putting up the frame, masons wrapping it, or on the newer builds their cladding-and-LED-panel descendants. The materials and the safety gear have moved on, and the low-voltage techs on the Sphere carry a load no 1930s crew imagined. The crew's shape has not.

Today's crews are better protected and better equipped, and they build things the 1930 gangs could not have: fall protection, engineered rigging, welding QA the pre-OSHA builds went without, and 5,000 tons of bolted steel on the Sphere set to within an inch. What has not changed is who does it. The Arch went up under fewer than 100 pairs of hands, the Sphere under 1,400, and in both cases the frame rose because skilled tradespeople stood on the steel and put it there. Built work still gets built the same way.

Sources

• Empire State Building: Wikipedia; ASCE Metropolitan Section landmark page (per-trade breakdown); Professional Roofing; History.com; ESBNYC facts and figures; Statista NYC office construction costs; Beacon Consulting Group; ServiceTitan.
• Chrysler Building: Wikipedia; New World Encyclopedia; NYC Landmarks Preservation Commission designation report LP-0992; The Skyscraper Museum; Metro Manhattan; U.S. BLS commercial office construction labor data; Mohawk skywalkers (Wikipedia).
• Statue of Liberty: NPS Statue of Liberty Facts; NPS Creating the Statue of Liberty; NPS 2022 Fort Wood contract; Wikipedia; Purdue MSE materials; Copper Development Association; GOBankingRates; Library of Congress workshop photographs.
• Washington Monument: U.S. Army Corps of Engineers construction history (EP 870-1-21, via NPS History); NPS History Chapter 2; NPS "The Point of the Matter"; NPS FAQs; Wikipedia; Smithsonian coverage of the 2012-14 restoration.
• Lincoln Memorial: NPS Building Statistics; NPS "The Making of the Lincoln Memorial"; NPS Design Individuals; ASCE Geo-Institute Jazz Age history; Wikipedia (Yule Marble and Lincoln Memorial); Washingtonian centennial coverage; Reflecting Pool references.
• Gateway Arch: NPS Gateway Arch FAQs; NPS "Fabricating the Steel"; Gateway Arch official fact sheet; Wikipedia; Incident Prevention; People's World; Labor Tribune; DOZR; BLS CPI Inflation Calculator.
• Space Needle: HistoryLink.org (File 1424); ASCE Civil Engineering magazine (July 2024); official Space Needle Facts page; Wikipedia; BLS CPI Inflation Calculator; KING 5; Construction Physics; Construction Junkie.
• The Sphere (Las Vegas): Wikipedia; Las Vegas Review-Journal; Construction Dive; MSG Entertainment press release; Engineering News-Record; STRUCTURE magazine; Cast Connex; 8 News Now (KLAS); The National.

The same trades are hiring now

The trades named across these cards, electricians, ironworkers, welders, carpenters, masons, operating engineers, HVAC installers, and low-voltage techs, are hiring today. You can see open roles on Rinvio's jobs board. Rinvio staffs every trade on these cards, placing W-2 field crews across the skilled trades for contractors who need them.