Steel Beam Cost per Foot (2027 Price Guide)
A steel beam's material cost per foot is its weight per foot times the price per pound. A W8x18 weighs 18 lb/ft, so at $0.55 to $0.85 per pound from a service center it runs about $10 to $15 per foot as raw steel. Fabricated, it's roughly $15 to $30 per foot. Installed in a house, consumer cost sites put it at $100 to $400 per foot.
Those three numbers get mixed up constantly, and that's why a homeowner and a fabricator can both say "a steel beam costs X per foot" and be off by 10 times. This guide shows where each layer comes from, gives you a size-by-size table for the W8 through W14 beams that show up on residential and light commercial work, and explains what pushes a quote up.
How much does a steel beam cost per foot in 2027?
Here's the short version, by what you're actually buying:
| What you're buying | Typical range per foot | What's included |
|---|---|---|
| Raw material, small residential sizes | $6 to $20 | Mill-length beam from a supplier, no cutting |
| Raw material, W8 to W14 (10-48 lb/ft) | about $5 to $41 | Weight × service-center $/lb |
| Fabricated (cut, drilled, plates welded) | about $9 to $80 | Material + shop labor + overhead |
| Installed (residential, all-in) | $100 to $400 | Engineer, permit, beam, delivery, labor, posts |
The first and last rows come from consumer cost guides. Angi puts steel I-beam material at $6 to $20 per linear foot and installation at $100 to $400 per foot including labor. HomeGuide lists $6 to $18 per foot for material and the same $100 to $400 installed, with complex jobs going higher. Both are 2026 figures and both are national averages, so check them against a local quote.
The middle rows are the ones a fabricator or estimator cares about, and they're derived below with the math shown.
All prices here are as of fall 2026. Steel moves. The BLS producer price index for hot-rolled bars, plates and structural shapes stood at 312.5 in August 2026 (June 1982 = 100), and the AGC reported steel mill product prices up 16.9 percent year over year in its June 2026 data. Check the current index and a current supplier quote before you price a job.
Why does weight per foot drive the price?
Mills and service centers sell structural steel by weight. A wide flange's designation tells you that weight directly. W12x26 means a nominal 12-inch-deep wide flange that weighs 26 pounds per linear foot. The AISC Shapes Database is the reference for every section's exact weight and dimensions.
So the formula is:
Material cost per foot = weight (lb/ft) × price ($/lb)
Piece cost = weight (lb/ft) × length (ft) × price ($/lb)
Worked example: a 22-foot W10x22 at $0.70/lb.
- 22 lb/ft × 22 ft = 484 lb
- 484 lb × $0.70 = $338.80 for the piece
- $338.80 ÷ 22 ft = $15.40 per foot
That's why two beams the same depth can be very different prices. A W12x26 and a W12x40 are both "12-inch beams." The W12x40 weighs 54 percent more per foot, so it costs about 54 percent more as material. If you want the full weight math for other shape types, see how to calculate steel beam weight.
If you're quoting dozens of beams off a drawing set rather than one, SteelFlo can find every size on the PDF and price the whole list with your own rates. The first 3 takeoffs are free.
Price table: common W8 to W14 residential and light commercial sizes
The table uses three illustrative material prices: $0.55, $0.70 and $0.85 per pound. That's $1,100 to $1,700 per ton, which covers the service-center band in our structural steel cost per ton guide from early 2026 plus some room for the increases since. It's not a quote. Swap in your supplier's number.
| Section | lb/ft | Material @ $0.55/lb | @ $0.70/lb | @ $0.85/lb |
|---|---|---|---|---|
| W8x10 | 10 | $5.50/ft | $7.00/ft | $8.50/ft |
| W8x18 | 18 | $9.90/ft | $12.60/ft | $15.30/ft |
| W8x31 | 31 | $17.05/ft | $21.70/ft | $26.35/ft |
| W10x12 | 12 | $6.60/ft | $8.40/ft | $10.20/ft |
| W10x22 | 22 | $12.10/ft | $15.40/ft | $18.70/ft |
| W10x30 | 30 | $16.50/ft | $21.00/ft | $25.50/ft |
| W12x26 | 26 | $14.30/ft | $18.20/ft | $22.10/ft |
| W12x40 | 40 | $22.00/ft | $28.00/ft | $34.00/ft |
| W14x22 | 22 | $12.10/ft | $15.40/ft | $18.70/ft |
| W14x30 | 30 | $16.50/ft | $21.00/ft | $25.50/ft |
| W14x48 | 48 | $26.40/ft | $33.60/ft | $40.80/ft |
Each section links to its shapes page with dimensions and a weight calculator. For a deeper look at the lightest family, the W8 beam sizes chart lists every W8, and the wide flange beam sizes guide covers the rest.
Two things jump out of the table. A W14x22 costs the same per foot as a W10x22, because it weighs the same. The deeper beam is stiffer for the same steel, which is one reason engineers often pick it. And the jump from the light to the heavy end of any depth is bigger than most people expect: a W8x31 is more than three times the material cost of a W8x10.
Engineering note: the engineer of record sizes the beam. These tables are for pricing a beam someone has already specified. Don't pick a size off a price chart.
Material vs fabricated vs installed: what does each number include?
This is where most of the confusion comes from.
Material. A full-length beam off a service-center rack. Wide flanges commonly stock in 20, 40 and sometimes 30, 50 or 60-foot lengths, depending on the supplier. Buy a 14-foot beam and you may pay for a 20-footer plus a cut charge. Small orders also carry minimums and delivery fees.
Fabricated. Cut to length, holes drilled or punched, end plates or bearing plates welded on, shop primer. Fabricators often think in dollars per pound here. Our fabricated steel cost per pound guide puts simple, repetitive structural work at roughly $0.85 to $1.20/lb and moderate commercial at $1.10 to $1.65/lb in 2026. Applied to the beams above:
| Section | lb/ft | Fabricated @ $0.85/lb | @ $1.20/lb | @ $1.65/lb |
|---|---|---|---|---|
| W8x18 | 18 | $15.30/ft | $21.60/ft | $29.70/ft |
| W10x22 | 22 | $18.70/ft | $26.40/ft | $36.30/ft |
| W12x26 | 26 | $22.10/ft | $31.20/ft | $42.90/ft |
| W14x30 | 30 | $25.50/ft | $36.00/ft | $49.50/ft |
| W14x48 | 48 | $40.80/ft | $57.60/ft | $79.20/ft |
One beam for a house won't get a per-pound rate. A shop will price it as a small job with a minimum, and the effective per-foot number can be well above this table.
Installed. For a residential beam, this is the whole project: structural engineer, permit, temporary shoring, removing the wall, getting the beam into the house, posts and footings, and finishing. The steel itself is often a small share of the total. That's why installed numbers sit at $100 to $400 per foot even though the beam might be $15 a foot.
What adds cost: length, cuts, holes, plates, paint, galvanizing?
Starting from material, these are the line items that move a beam quote:
| Cost driver | Why it matters |
|---|---|
| Odd length | You pay for the stock length and the drop. A 23-foot beam may come out of a 40-footer, leaving a 17-foot drop the shop has to use or scrap. |
| Cuts | Each cut is saw time and handling. Miters and copes cost more than square cuts. |
| Holes | Punched or drilled bolt holes for connections. More holes, more time. |
| Welded plates | Bearing plates, end plates, cap plates. Plate weight plus welding labor. |
| Camber | Pre-curving a beam is a separate operation, often subcontracted. |
| Shop primer or paint | Usually a per-pound or per-square-foot adder. |
| Galvanizing | A per-pound adder. Our galvanizing cost per ton guide puts heavy structural at about $0.18 to $0.28/lb in 2026, plus lot minimums. |
| Delivery | Fixed per trip. On a single residential beam, it can be a big chunk of the price. |
| Small-order minimums | Most shops won't open a job for less than a set amount. |
The pattern: labor scales with the number of pieces and operations, not with weight. Ten light beams with end plates cost more per pound than two heavy beams with plain ends.
How do fabricators quote a beam job (and why might yours differ)?
A fabricator pricing a set of drawings doesn't look up a per-foot number. The steps are roughly:
- Take off every member. Section, count and length for each beam, column, angle and plate.
- Extend weight. Length × weight per foot for each piece, summed by section.
- Price material. Weight × current $/lb from their supplier, plus waste and drops from nesting to stock lengths.
- Add shop labor. By piece and operation (cuts, holes, welds), using their own production rates.
- Add coatings, freight, erection if it's in scope.
- Add overhead and margin.
So two quotes on the same beam can differ for good reasons: one shop has the stock on the rack, another has to order it; one has a CNC beam line, another drills by hand; one prices erection, another doesn't. When you compare quotes, compare scope first.
For an estimator, step 1 is where the time goes. Counting 40 beams across 12 sheets and measuring each one is the slow part, and it's also where missed pieces turn into lost money.
Frequently Asked Questions
How much does a 20-foot steel beam cost?
Multiply the beam's weight per foot by 20 and by the price per pound. A 20-foot W8x18 is 360 pounds, so at $0.70/lb the material is about $252. Fabrication, delivery and installation are extra.
What does a W8x18 cost per foot?
As raw material, about $10 to $15 per foot at $0.55 to $0.85 per pound (as of fall 2026). Fabricated, it's roughly $15 to $30 per foot depending on the work. Check a current supplier quote, since steel prices change month to month.
Why are installed steel beam prices so much higher than material prices?
Installed pricing includes the engineer, permit, shoring, demolition, labor, posts and finishing. On a residential job the beam itself is often a small part of the total. That's why consumer guides show $100 to $400 per foot installed while material is in the teens.
Is a deeper beam always more expensive?
No. Price follows weight, not depth. A W14x22 and a W10x22 weigh the same per foot, so their material cost per foot is the same. The engineer picks the section; the price follows from its weight.
How do I price steel beams for a whole set of drawings?
Take off every beam by size and length, extend the weight, and price it against your material and labor rates. You can do one beam at a time in the free steel weight calculator, or upload the PDF set to SteelFlo's takeoff software to get every size and count from the drawings at once.
Bottom line
Per-foot beam prices only make sense once you know which layer you're looking at: material, fabricated or installed. For one beam, the calculator and a supplier call will get you there. If you quote beams off drawing sets every week, the faster path is getting the full member list out of the PDF and pricing it against your own rates in one pass. That's what SteelFlo does, and you can try it on 3 takeoffs for free.