What counts as a fit-up feature?

Define one repeatable location that you position, gauge and clamp. Use the same definition in the count and timed observation.

Does this include tack welding?

No. The operation ends with the assembly positioned and clamped for tacking. Plan tack placement and final welding separately.

Where does checking overall squareness belong?

Enter overall squaring time with crane and jig minutes if it is outside the feature-fitting observation. Routine local feature checks belong in the measured feature rate.

Can I use one rate for an entire weldment?

Use one rate only when the features have comparable access and work. Calculate distinct feature groups separately and add any shared handling once.

Welding & Fabrication calculator

Assembly Fit-Up Time Calculator

Estimate operator time to position, gauge and clamp an assembly for welding. Enter feature count, an observed fit rate, separate crane and squaring minutes and your time target.

What this calculator does

Plan assembly fit-up minutes from required features and separately observed crane, jig and squaring work.

Formula used

Active feature fit time = fit-up features ÷ active features per minute
Required fit-up time = active feature fit time + crane, jig and squaring minutes
Fit-up time reserve = entered target − required fit-up time

Inputs explained

Fit-Up Features: Count locations to position, gauge and clamp on the assembly.
Active Feature Fit Rate: Timed positioned, gauged and clamped features per active minute.
Crane, Jig and Squaring Time: Recorded crane, jig and overall squaring minutes outside feature fitting.
Fit-Up Time Target: Allowed minutes to complete this assembly fit-up.

How to use the result

Best suited to weld fixture loading, assembly quote preparation.
Input bounds are numerical limits for this implementation, not recommended process settings. Tacking, final welding and inspection require separate time estimates. Large differences in feature access require separate operation groups.

Current U.S. benchmarks

The producer price index for steel mill products stands at 381.162 (BLS, Aug 2026), up 23.4% from a year earlier. Quotes priced off last quarter's material cost miss this move.
Industrial electricity averages 9.77 cents per kWh across the U.S. (EIA, Jul 2026), up 4.7% from a year earlier. Energy-intensive steps carry this directly into unit cost.
U.S. iron and steel import customs value ran $2.2B in Aug 2026 (Census International Trade). The U.S. ran a trade deficit of $0.6B in the category that month. This dollar total mixes price, quantity, product mix, origin, and timing; it does not measure physical import volume or prove a tariff or reshoring effect.
The U.S. has 53,790 fabricated metal products establishments employing about 1,441,471 workers (Census County Business Patterns, 2023).

Common questions

What counts as a fit-up feature? Define one repeatable location that you position, gauge and clamp. Use the same definition in the count and timed observation.
Does this include tack welding? No. The operation ends with the assembly positioned and clamped for tacking. Plan tack placement and final welding separately.
Where does checking overall squareness belong? Enter overall squaring time with crane and jig minutes if it is outside the feature-fitting observation. Routine local feature checks belong in the measured feature rate.
Can I use one rate for an entire weldment? Use one rate only when the features have comparable access and work. Calculate distinct feature groups separately and add any shared handling once.

Last reviewed 2026-10-06.