Correct Answer - Option 2 : 2 mm
Explanation:
According to IS 800:2007 Clause 10.2.1, page no. 73,
The diameter of the hole should be the nominal diameter of the bolt plus the clearance as given below:
Standard Clearance for Fastener Holes (IS 800: 2007, Table no. 19) given below:
| Nominal size of fastener, d (mm) |
Size of the hole = Nominal diameter of the fastener + Clearance |
| Standard clearance in diameter and width of slot (mm) |
Oversize clearance in diameter (mm) |
Clearance in the length of the slot |
| Short slot (mm) |
Long slot (mm) |
| 12-14 |
1.0 |
3.0 |
4.0 |
2.5d |
| 16-24 |
2.0 |
4.0 |
6.0 |
2.5d |
| 24 |
2.0 |
6.0 |
8.0 |
2.5d |
| More than 24 |
3.0 |
8.0 |
10.0 |
2.5d |
