Question

A 22 mm diameter bolt of grade 4.6 is used for double cover butt joint. Cover plates and main plates to be jointed are 8 mm and 14 mm thick. The shearing strength of 22 mm diameter bolt is ______kN . [ Assume thread area is at shear plane]

• A. 189.66
• B. 140.38
• C. 109.56
• D. 70.19

Answer 1

The correct option is C 109.56

The strength of bolt in double shear,
$V_{sb}=2\times A_{nb}\times \frac{f_{ub}}{\sqrt{3y_{mb}}}$
$=2\times (0.78\times \frac{\pi }{4}\times {22}^2)\times \frac{400}{\sqrt{3}\times 1.25}\times {10}^{-3}$
=109.56 kN