Question: 4. A double riveted double cover butt joint is made in 12 mm thick plates with 18 mm diameter rivets. Find the efficiency of the

4. A double riveted double cover butt joint is made in 12 mm thick plates with 18 mm diameter rivets. Find the efficiency of the joint for a pitch of 80 mm, if t = 115 MPa ; t = 80 MPa and oc = 160 MPa. [Ans. 62.6%]

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