Eccentric Fillet Weld Group (Elastic Method)
Line polar moment, direct shear, torsional components, the resultant unit force at the critical corner, and the required fillet leg for two vertical welds under in-plane eccentric load by the AISC elastic (vector) method. The conservative elastic method, a screen; the engineer of record governs.
Formula and source
Two vertical welds length D, separation B: L_w = 2D; Ix = D3/6; Iy = D B2/2; J = Ix + Iy; direct shear f_d = P/L_w; torque T = P x e; f_tx = T(D/2)/J; f_ty = T(B/2)/J; resultant f_r = sqrt(f_tx2 + (f_d + f_ty)2); required leg (sixteenths) = ceil(f_r / allowable per 1/16 in).
Eccentrically loaded fillet weld group, elastic (vector) method, per AISC 360 and the AISC Steel Construction Manual Part 8, by name.
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