Calculating Bolt Diameter for Shear Stress in a Riveted Joint

[jojoba]

This is a problem given for laboratory analysis, but there are no relevant equations in our textbook to help solving the problem. Could anyone just give me a hint on what equation should be used to solve the problem? the only relevant equation I know is :
shear stress = F/A
1. The figure below is of a riveted joint. The joint is fastened together using two bolts.
Determine the required diameter of the bolts if the allowable shear stress for the
bolts is 85 MPa.:

The figure is shown on the last page of the attachment..thanks

 

[KLoux]

You've got everything you need:

Use the equation you supplied. What is F (I saw it in the .pdf you supplied...)? You already know the shear stress, right?

The only thing left is to relate the area to the bolt diameter and the number of bolts. That should be easy, right?

Hope this helps!

-Kerry