Welded Connections Calculator

Fillet-weld group screening for segmented weld geometry and in-plane loading. The module accepts weld size, electrode strength, base-metal strength, and load components Vx, Vy, N, and Mz, then reports the governing weld capacity and capacity per millimetre.

Engineering Scope

This calculator evaluates fillet-weld capacity from the entered geometry and load state, then compares the demand with the governing weld resistance for the selected code routine. The result set exposes the total capacity, capacity per millimetre, and the governing utilization.

The current scope is fillet weld only. Groove welds, out-of-plane loading, fatigue, and fracture-critical checks are outside the module.

Calculation Model

For equal-leg fillet welds the effective throat is taken as:

te = w / sqrt(2)
phiRn = 0.75 * 0.6 * FEXX * te * L

The module accepts a segmented weld geometry, electrode classification, base-metal Fu, base-plate thickness, and in-plane loads Vx, Vy, N, and Mz. The calculation trace reports the selected code reference and the governing capacity values used in the result.

Outputs

The page reports total weld capacity, capacity per millimetre, and the governing utilization ratio for the selected load state. Use the trace to reproduce the governing check independently.

Limitations

The page is limited to fillet welds.
The weld group is evaluated as a planar in-plane problem only.
Groove welds, out-of-plane loading, fatigue, and fracture toughness checks are not included.
All calculations and outputs must be independently verified by a licensed Professional Engineer before design use.

Worked Example

For the default 300 mm rectangular fillet-weld group with 8 mm E70XX electrode and combined in-plane loading, the module calculates a total capacity and a capacity per millimetre from the segmented geometry, then reports the governing utilization. Use the trace to reproduce the governing check independently.

Verification

Confirm the weld size, electrode classification, segment geometry, base-metal strength, and active code edition before relying on the result. Replicate the governing capacity independently by hand or in a spreadsheet.

Disclaimer

All calculations and reported values must be independently verified by a licensed Professional Engineer before use in design, detailing, procurement, fabrication, construction, or permit submission. This tool is provided without warranty of accuracy, completeness, fitness for purpose, or project-specific code compliance. The site operator disclaims liability for any loss, damage, claim, cost, or consequence arising from use of, or reliance on, the calculator or its outputs.