Question: A double riveted double strap butt joint is made with 12 mm thick plates and 18 mm diameter rivets. The pitch of the joint

A double riveted double strap butt joint is made with 12 mm

A double riveted double strap butt joint is made with 12 mm thick plates and 18 mm diameter rivets. The pitch of the joint is 80 mm. Allowable stresses are: ot = 115 MPa, t = 80 MPa, and o. = 160 MPa. The efficiency of the joint is (a) 56% (c) 60% (b) 58% (d) 63%

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