Correct Answer - Option 2 : d = 6.05(t)
1/2
Explanation:
When the thickness of the plate is more than 8 mm, the rivet diameter is calculated by Unwin’s formula.
\(d = 6.05\sqrt t \)
where,
d = diameter of the rivet (mm)
t = thickness of the wall
When the thickness of the plate is less than 8 mm, the diameter of the rivet is obtained by equating the shear resistance of the rivets to crushing resistance.
Diameter of the rivet is never less than the plate thickness.