The 'angle of inclination' of weld size for an inclined fillet weld from the throat:
Choose the correct answer
Throat = leg size for all cases
Throat = 0.707 × leg size for equal-leg fillet weld (45° bisector to weld face) — all stresses computed on throat
Throat = 2 × leg size
Throat is not used in design
Correct Answer
B. Throat = 0.707 × leg size for equal-leg fillet weld (45° bisector to weld face) — all stresses computed on throat
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Fillet weld throat: for equal leg fillet weld leg size s, throat = s/√2 = 0.707s (45° to legs). For unequal legs or oblique angle, throat = minimum distance from weld root to weld face. IS 816 / IS 800: effective throat must be used in stress calculation. All fillet weld stresses (shear, tension) referred to throat plane. Design strength = throat area × fwd = 0.707s × lw × fwd.
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