Mechanical Engineering
Fillet Weld Sizing & Design
Calculate minimum weld leg and throat sizes for secure structural joints subject to direct shear forces. Observe size requirements dynamically via animated force sweep, live layout, design curves, and downloadable tables.
Weld Type
Fillet Weld
Lap/T-Joint
Governing Code
AWS D1.1
LRFD / ASD
Output
CSV
Export ready
Parameters
Electrode preset
Animated load sweep
Design Principles
Throat Thickness (t)
t = P / (L * τ_allow)
Leg Size (w)
w = t / 0.707
Weld Cross Section
A_w = t * L
Required weld throat size: 3.33 mm.
Minimum fillet weld leg size: 4.71 mm.
Linked Joint Diagram
Min. Throat Size (t)
3.333mm
Min. Leg Size (w)
4.715mm
Applied Force
15.0kN
Allowable Stress
90MPa
Leg & Throat Sizes vs. Applied Force
Sizing Data Table
| Load (N) | Throat (mm) | Leg Size (mm) |
|---|---|---|
| 1,000 N | 0.22 mm | 0.31 mm |
| 3,000 N | 0.67 mm | 0.94 mm |
| 5,000 N | 1.11 mm | 1.57 mm |
| 7,000 N | 1.56 mm | 2.20 mm |
| 9,000 N | 2.00 mm | 2.83 mm |
| 11,000 N | 2.44 mm | 3.46 mm |
| 13,000 N | 2.89 mm | 4.09 mm |
| 15,000 N | 3.33 mm | 4.71 mm |
| 17,000 N | 3.78 mm | 5.34 mm |
| 19,000 N | 4.22 mm | 5.97 mm |
| 21,000 N | 4.67 mm | 6.60 mm |
| 23,000 N | 5.11 mm | 7.23 mm |
| 25,000 N | 5.56 mm | 7.86 mm |
| 27,000 N | 6.00 mm | 8.49 mm |
| 29,000 N | 6.44 mm | 9.12 mm |
| 31,000 N | 6.89 mm | 9.74 mm |
| 33,000 N | 7.33 mm | 10.37 mm |
| 35,000 N | 7.78 mm | 11.00 mm |
| 37,000 N | 8.22 mm | 11.63 mm |
| 39,000 N | 8.67 mm | 12.26 mm |
| 41,000 N | 9.11 mm | 12.89 mm |
| 43,000 N | 9.56 mm | 13.52 mm |
| 45,000 N | 10.00 mm | 14.14 mm |
| 47,000 N | 10.44 mm | 14.77 mm |
| 49,000 N | 10.89 mm | 15.40 mm |