Your 2028 capacity date is a labour forecast

The 2028 delivery date on new AI capacity is a forecast about craft labour, and the crew that installs the plant appears in none of the filings that price it. Sterling Infrastructure's E-Infrastructure revenue rose 212% to $1.30 billion in the quarter ended 30 September 2026, and the company states that “Mission-critical projects, including data center campuses, manufacturing and semiconductor facilities, represent approximately 95% of this opportunity”, where the opportunity is the segment's signed backlog, unsigned awards and next phases in design, approaching $7 billion. Its signed backlog covers 7.9 months of its own revenue. A year earlier it covered 11.2.

This reaches you if you have leased or committed to capacity that must be delivered in 2028 and the installation is priced on a guaranteed maximum price or a fixed price. It reaches the developer signing the EPC for a hall already leased to a tenant, the CIO who wrote a 2028 date into an operating plan, and the CFO who will meet the escalation clause inside the construction budget.

01The book the buyer is relying on is not the book the contractor prints

Quanta Services prints a record $63.73 billion of total backlog, and $21.98 billion of it is a category Quanta calls “Estimated orders under MSAs and short-term, non-fixed price contracts”. What remains as a remaining performance obligation is $41.75 billion, 3.5 quarters of the $12.0 billion Quanta billed in the quarter. Of the whole book, $38.45 billion is scheduled inside twelve months, which is 3.2 quarters at the current rate. The contractor with the longest book in the set has less than a year of work inside a year.

MasTec's $24.5 billion is an 18-month backlog, and at $5.2 billion of quarterly revenue it fills 14.1 of those 18 months. EMCOR's $18.57 billion of remaining performance obligations covers 10.0 months, up from 8.8, and its largest growth came in a sector it names in its own words: “The most significant RPO growth occurred within the Network and Communications market sector as mission critical facilities continue to require substantial electrical infrastructure and increasingly sophisticated cooling systems.” Trane Technologies, which makes the chillers and the air handling, holds $12.5 billion of backlog worth 5.5 months of its $6.76 billion quarter, having booked $1.07 of orders for every dollar it billed.

02Sterling signed 90 cents of new work for every dollar it billed

Sterling is the only contractor in the set that names data centre campuses, and it is the only one whose book shortened: signed backlog of $4.14 billion covers 2.6 quarters of revenue, against 3.7 a year earlier, which is 7.9 months against 11.2. The combined figure that gets quoted, $6.14 billion, includes $2.00 billion of awards that are not signed. Sterling's book-to-burn for the quarter was 0.9x on signed backlog and 1.4x on the combined measure, 90 cents of new signed work for every dollar it billed. Revenue rose 127% and 70 points of that were organic; the rest came with acquisitions. CEC, the electrical business Sterling bought, quadrupled revenue on a pro forma basis, and the chief executive says the company now believes CEC “has the potential to generate over $1 billion in revenue in 2026”.

Set that book against the dates the filings publish. TeraWulf's filing of 4 November 2026 puts delivery of 401 MW to Anthropic “in phases beginning in late 2027 and concluding in the second quarter of 2028”, with rent commencing on delivery of each data hall. Portland General Electric counts “Up to 420 MW of 2026 executed contract, not under construction, expected energization in 2028”. Delivery sits between late 2027 and 2028, against a signed book 7.9 months deep. Of the nearly $8 billion of scoped work Sterling names across the company, $4.14 billion is signed backlog and $2.00 billion is unsigned awards; the segment split is not disclosed. The work behind a 2028 date is not yet a signed contract in this market. It is a design pipeline and an assumption about who will be available to build it.

03A crew is not a purchase order

Four of the five describe labour as a resource they allocate, and not one of them says how much of it there is. MasTec's chief executive, Jose Mas, ties capacity to retention: “we believe retaining our experienced crews is critical to capitalize on the significant level of industry investment ahead”, in a quarter when “crews and equipment were underutilized” on delayed pipeline work. Quanta's Duke Austin calls his workforce fungible: “This flexibility allows us to strategically deploy resources where demand is strongest”. Sterling moved crews out of transportation, where revenue declined 3%, into E-Infrastructure. EMCOR lists “scarcity of skilled labor” among the conditions that could affect its results. A turbine is a purchase order with a delivery date and a chip is a wafer start. A crew is a hiring and training decision, and none of these documents carries one.

04EMCOR took 0.4 points of margin in the quarter Trane gave up the same

EMCOR's operating income was $545.8 million, 9.8% of revenues, against $405.7 million at 9.4% a year earlier, on a quarter that grew 28.8% with 25.5 points of it organic. Trane, one step upstream with the chillers and the air handling, went the other way: bookings up 21% and a GAAP operating margin of 19.9% against 20.3%, giving up in the same three months the 0.4 points EMCOR took. MasTec, which installs as well, went further down: operating income of $275 million on $5,152 million of revenue, against $250 million on $3,967 million, which is 5.3 cents of operating income on the dollar against 6.3 cents a year earlier, and its release puts the cause in “permitting related access delays on certain Pipeline projects”, where “crews and equipment were underutilized”. Its adjusted EBITDA of $486.4 million was still a record, and Sterling's more than doubled.

The unit to carry into your own budget is 9.8 cents. That is EMCOR's operating profit for every dollar of installation revenue in the quarter ended 30 September 2026, up from 9.4 cents, and it is the part of a construction budget that stays with the contractor whichever way the schedule goes. The buyer's counterweight is the contract form, and that is where the next decision sits.

05Who pays for a late crew is a clause, written before anyone is hired

Three documents decide who absorbs a delay. The construction contract chooses between a guaranteed maximum price, where the contractor carries the cost of its own labour and liquidated damages cap what the owner recovers, and cost-plus, where the owner carries it and the contractor's margin is a percentage of whatever the delay costs. The force majeure clause decides whether a shortage of trades is an excuse or a breach, and that is the clause a contractor has every reason to widen while labour is scarce. The lease decides the rest: at Hawesville rent commences on delivery of each data hall, so the landlord carries the revenue delay while the tenant carries the slip in its own compute plan against a price struck at signature.

The date belongs to the CIO, the price belongs to the CFO, and the sentence that decides which of them pays for a late crew belongs to the general counsel. That is the handoff this market is making: a capacity plan signed by one seat, priced by a second, enforced by a third, and delivered by a contractor whose crew count nobody in the chain has asked for.

06What each seat does, and by when

07The board resolves the 2027 to 2028 capacity package before 31 March 2027

The decision the board puts its name to is the 2027 to 2028 capacity and construction commitment, taken at the Q1 2027 board and in every case before 31 March 2027. What it approves is a package in which every 2028 delivery date carries the contract form that prices it, the signed backlog behind it, the liquidated damages cap, and a named superintendent for each phase. A date without those four is a target that has been written into a commitment. That is what the quarter makes urgent: four of the five contractors printed a longer book while the one that names data centres printed a shorter one, and none of them printed a crew count.

• How much of the 2028 build sits with one contractor, and what is that contractor's book-to-burn on signed work?
• Who at board level is accountable for the 2028 dates holding, and what does that person report against each quarter?

08The documents every number here comes from

• Sterling Infrastructure, Form 8-K, Item 2.02, Exhibit 99.1, filed 28 October 2026, accession 0000874238-26-000122.
• Quanta Services, Form 8-K, Item 2.02, Exhibit 99.1, filed 29 October 2026, accession 0001193125-26-436949.
• MasTec, Form 8-K, Item 2.02, Exhibit 99.1, filed 29 October 2026, accession 0000015615-26-000127.
• EMCOR Group, Form 8-K, Item 2.02, Exhibit 99.1, filed 29 October 2026, accession 0000105634-26-000132.
• Trane Technologies, Form 8-K, Item 2.02, Exhibit 99.1, filed 29 October 2026, accession 0001466258-26-000001.
• TeraWulf, Form 8-K, filed 4 November 2026, on the Raylan Data lease of approximately 401 MW to Anthropic at Hawesville, Kentucky.
• Portland General Electric, Form 8-K, Exhibit 99.2, filed 29 October 2026, on large load contracts with data centre customers.

09What to watch before 31 March 2027

• Sterling's December quarter, reported in late February 2027. If book-to-burn on signed backlog is above 1.0x while revenue still grows more than 20%, the reading that crews cap what this contractor can sign fails: it would be signing work faster than it burns it.
• Any contractor in the set that discloses a crew count, a hiring target or a training intake. That is capacity being created rather than allocated, and it is the one disclosure that would break this thesis.
• The unsigned awards inside Sterling's combined backlog, $2.00 billion at 30 September 2026. If that line grows faster than the signed line, the $7 billion of E-Infrastructure scoped work is moving further from contract, not closer.
• EMCOR's operating margin. 9.8% was the installer's price in a quarter growing 28.8%. If it holds above 9.8% into 2027 while bookings grow, the trades still have pricing power and the buyer still pays.
• The first data hall delivered at Hawesville against the late 2027 start published on 4 November 2026. Delivery in the second quarter of 2028 confirms this schedule; anything later says the crew set the date.