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Fillet Weld Sizing Calculator EN 1993-1-8

Compute required throat a, design resistance Fw,Rd and stresses σ⊥, τ⊥, τ∥ per EN 1993-1-8 §4.5.3. Directional (§4.5.3.2) and simplified (§4.5.3.3) methods. Reverse mode solves minimum throat for given load. No sign-up.

a F⊥ F∥

T-joint

a F∥ F⊥

Lap joint

Sizing the bolts? Use the EN 1993-1-8 Bolt Capacity Calculator.
Weld & Material
Geometry
Applied Forces (per unit length, N/mm)
Results
0.2% PASS ✓
Minimum throat a_req 3 mm
Active throat a_check 6 mm
a_min (§4.5.2) 3 mm
a_max = 0.7·t_min 7 mm
Verdict
Check η Limit Result
§4.5.3.2 Combined 0.2% ≤ 100% PASS ✓
§4.5.3.2 σ⊥ cap 0.1% ≤ 100% PASS ✓
Material & Strength
f_u 430 MPa
β_w 0.85
γ_M2 1.25
f_u/(β_w·γ_M2) [dir limit] 404.71 N/mm²
0.9·f_u/γ_M2 [σ⊥ cap] 309.6 N/mm²
f_vw,d (simplified strength) 233.66 N/mm²
n_unit (F⊥/L) 2.5 N/mm
v_unit (F∥/L) 1.5 N/mm
F_res = √(n²+v²) 2.92 N/mm
F_w,Rd per mm (simplified) 1401.9 N/mm
EN 1993-1-8 Table 4.1 — β_w & f_u
Steel grade β_w (Table 4.1) f_u (MPa)
S235 0.8 360
S275 0.85 430
S355 0.9 490
S420 1 520
S460 1 560

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Related Tools

→ EN 1993-1-8 Bolt Capacity Calculator
→ Bolted Splice Plate Design
→ Fin Plate Shear Connection
→ Fin Plate Connection
→ Endplate Moment Connection
→ Beam moment capacity (EN 1993-1-1 §6.2.5)

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