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Q: The effective throat thickness of a fillet weld shall NOT be
  • A. equal to the size of the weld
  • B. equal to the length of the hypotenuse of the triangle
  • C. the function of the angle between the fusion sides
  • D. less than 3 mm
Correct Answer: Option D - As per (IS : 800-2007) Cl. 10.5.3.1.– Effective throat thickness– The effective throat thickness of a fillet weld is the perpendicular distance from the root to the hypotenuse of the largest isosceles right angles triangle that can be inscribed with the weld cross-section. • The effective throat thickness of a fillet weld shall not be less than 3 mm and shall not exceed 0.7 t and 1.0 t under special circumstances, where t is the thickness of thinner part.
D. As per (IS : 800-2007) Cl. 10.5.3.1.– Effective throat thickness– The effective throat thickness of a fillet weld is the perpendicular distance from the root to the hypotenuse of the largest isosceles right angles triangle that can be inscribed with the weld cross-section. • The effective throat thickness of a fillet weld shall not be less than 3 mm and shall not exceed 0.7 t and 1.0 t under special circumstances, where t is the thickness of thinner part.

Explanations:

As per (IS : 800-2007) Cl. 10.5.3.1.– Effective throat thickness– The effective throat thickness of a fillet weld is the perpendicular distance from the root to the hypotenuse of the largest isosceles right angles triangle that can be inscribed with the weld cross-section. • The effective throat thickness of a fillet weld shall not be less than 3 mm and shall not exceed 0.7 t and 1.0 t under special circumstances, where t is the thickness of thinner part.