Fillet Weld Calculator
Check a fillet weld with the simplified method of EN 1993-1-8 (Eurocode 3). Enter the steel, the leg size, the weld length and the design load to see the weld's resistance and the leg size the load needs.
Results
Weld resistance Fw,Rd:
- Throat thickness a
- Effective length, total
- Design shear strength fvw,d
- Resistance per mm of weld
- Utilisation
- Smallest leg for this load
a = s / √2 for an equal-leg 90° fillet. fvw,d = (fu / √3) / (βw · γM2). Fw,Rd = fvw,d · a · effective length.
The simplified method treats the weld force as a shear on the throat, whatever its direction, so it is safe for any load direction. The directional method of EN 1993-1-8 can give more capacity for welds loaded across their length.
Resistance per 100 mm of weld for each leg size
| Leg s, mm | Throat a, mm | kN per 100 mm, one weld |
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