How is a rivet joint of uniform strength designed? A double riveted, zig-zag butt joint, in which the pitch of the rivets in the outer row is twice that in the inner rows; connects two 16 mm plates with two cover plates, each 12 mm thick. Determine the diameter of the rivets and pitch of the rivets and pitch of the rivets, if the working stresses are: ot = 100 MPa, oc = 150 MPa, and t= 75 MPa.