How do you calculate crane weldment cost?

Multiply seam length by cost per inch and by the full-penetration share, then add the fit-up and fixturing charge. For 4,800 in at $6.50/in with a 60% CJP share plus $8,000 fixturing, total cost is $26,720.

What is the cost per inch of crane weld seam?

Divide total weldment cost by seam length. In the example, $26,720 over 4,800 inches is about $5.57 per inch of seam, including fixturing.

Why does full-penetration weld share matter so much?

CJP welds require joint prep, multiple passes, and NDT, costing far more than fillets. Here the 60% CJP share sets the $18,720 variable cost; raising it pushes cost up sharply, so reducing CJP seam in design saves the most.

What drives crane weldment cost besides welding?

Fit-up and fixturing — jigs, tacking, alignment, and preheat setup on large box sections — is a major fixed cost, $8,000 here. It does not scale with seam length, so it hits short-seam weldments hardest per inch.

How can I reduce crane weldment cost?

Reduce total seam length, convert non-critical CJP joints to fillet or partial-pen where code allows, and amortize fixturing across more identical weldments. Each lowers either the $18,720 variable cost or the per-inch figure.

Does this include material and NDT?

The weld cost per inch should bundle consumables and can include NDT if you load it in; plate material is separate. Enter a rate that reflects what you want captured, and keep base steel as its own line.

Port, Crane & Terminal Equipment calculator

Crane Weldment Cost Calculator

Crane weldment cost estimates the fabrication cost of the heavy structural weldments in port and terminal cranes — box girders, sill beams, portal ties — where full-penetration (CJP) welds and rigorous fit-up dominate labor hours. Estimators and fabrication managers for ship-to-shore and RTG/RMG cranes use it to quote large weldments and to compare seam-reduction design options. Because CJP welds with NDT are far more expensive per inch than fillet welds, the full-penetration share is the single biggest cost lever on a crane structure. This calculator rolls seam length, weld rate, penetration share, and fixturing into a total and a cost per inch of seam.

What this calculator does

Estimate the fabrication cost of a port crane structural weldment from total weld seam length, per-inch welding cost, and the share of full-penetration joints.
A fabrication estimator prices the boom girder weldment on a ship-to-shore crane before committing to a steel package quote.
It estimates total weldment cost from seam length times weld cost per inch scaled by the full-penetration share, plus a fixed fit-up and fixturing charge, and gives cost per inch of seam.

Formula used

Weldment cost = seam length x cost per inch x full-penetration share% + fit-up/fixturing
Cost per inch of seam = total weldment cost / seam length

Inputs explained

Weld Seam Length:
Welding Cost per Inch:
Full-Penetration Weld Share:
Fit-Up & Fixturing Charge:

How to use the result

Use it when quoting crane structural weldments or evaluating a design change that adds or removes CJP seam.
It applies one blended weld rate and one CJP share across the whole weldment; real crane structures mix fillet, partial-pen, and CJP welds at very different costs, so segment the estimate for high accuracy.

Current U.S. benchmarks

U.S. housing starts run at 1,177k per year (Census, May 2026), down 8.7% from a year earlier, the demand driver for building products.
Steel mill PPI stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate crane weldment cost? Multiply seam length by cost per inch and by the full-penetration share, then add the fit-up and fixturing charge. For 4,800 in at $6.50/in with a 60% CJP share plus $8,000 fixturing, total cost is $26,720.
What is the cost per inch of crane weld seam? Divide total weldment cost by seam length. In the example, $26,720 over 4,800 inches is about $5.57 per inch of seam, including fixturing.
Why does full-penetration weld share matter so much? CJP welds require joint prep, multiple passes, and NDT, costing far more than fillets. Here the 60% CJP share sets the $18,720 variable cost; raising it pushes cost up sharply, so reducing CJP seam in design saves the most.
What drives crane weldment cost besides welding? Fit-up and fixturing — jigs, tacking, alignment, and preheat setup on large box sections — is a major fixed cost, $8,000 here. It does not scale with seam length, so it hits short-seam weldments hardest per inch.
How can I reduce crane weldment cost? Reduce total seam length, convert non-critical CJP joints to fillet or partial-pen where code allows, and amortize fixturing across more identical weldments. Each lowers either the $18,720 variable cost or the per-inch figure.

Last reviewed 2026-05-12.