Port, Crane & Terminal Equipment worked example

Crane Weldment Cost at 69% full-penetration weld share: a worked example

What does the result look like when full-penetration weld share reaches 69%? The full calculation is worked below with real intermediate numbers. A fabrication estimator prices the boom girder weldment on a ship-to-shore crane before committing to a steel package quote.

The inputs for this scenario

  • Weld Seam Length: 4,800 in (unchanged)
  • Welding Cost per Inch: 6.5 $/in (unchanged)
  • Full-Penetration Weld Share: 69 % (raised for this scenario; the documented default is 60)
  • Fit-Up & Fixturing Charge: 8,000 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Weldment cost = seam length x cost per inch x full-penetration share% + fit-up/fixturing) to the inputs above produces each figure below.
  • At this operating point the engine returns 29,528 $ for total crane weldment cost, the number this scenario is built around.
  • At this operating point the engine returns 6.15 $ / piece for crane weldment cost per unit.
  • At this operating point the engine returns 21,528 $ for variable crane weldment cost.
  • At this operating point the engine returns 8,000 $ for fixed crane weldment cost adder.

How this compares with the baseline

  • Against the tool's baseline example, where full-penetration weld share sits at 60% and the headline result is 26,720 $, this scenario comes in 10.51% above the baseline at 29,528 $.
  • A figure at this level is achievable when full-penetration weld share is genuinely sustained, not just peaked for a shift. 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.

Results at a glance

  • Total crane weldment cost: 29,528 $ (headline result)
  • Crane weldment cost per unit: 6.15 $ / piece
  • Variable crane weldment cost: 21,528 $
  • Fixed crane weldment cost adder: 8,000 $

Run it with your numbers

  • Every input above is editable in the live Crane Weldment Cost calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.