The 'tensile stress capacity' of a fillet weld per unit length (IS 800) using weld strength fwd is:
Choose the correct answer
fy/γm0 (yield-based, not weld)
fwd = fu/(√3 × γmw) per unit throat — 0.707s × fwd per unit weld length (s = leg size)
0.5 × fy of parent metal
No design capacity — weld never fails in tension
Correct Answer
B. fwd = fu/(√3 × γmw) per unit throat — 0.707s × fwd per unit weld length (s = leg size)
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IS 800 Cl. 10.5.7.1: Fillet weld design capacity per unit throat length = fwd = fu/(√3×γmw) where fu = ultimate tensile stress of weld, γmw = 1.25. Design strength per unit length = fwd × throat thickness = fwd × 0.707 × s (s = leg size). All stress components referred to throat section: shear, tension, compression — same fwd applies. Vector combination if multiple stress components.
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