Correct Answer - Option 2 : 40 mm or four times the size of weld
Explanation:
The effective length of groove weld:
As per IS: 800-2007, Clause 10.5.4.2
The effective length of butt weld or groove weld shall be taken as the length of the continuous full-size butt weld, but not less than four times the size of the weld or minimum of 40 mm.
Maximum clear spacing between the effective length of the weld:
- For the welds in compression zone = Minimum of 12 × Thickness of the weld or 200 mm
- For the welds in tension zone = Minimum of 16 × Thickness of the weld or 200 mm