Riveted butt joints: identify the double-cover joint with two rows per main plate Two main plates butt together and are covered by plates on both sides. If there are two rows of rivets per main plate and the rows on each side are opposite each other, name the joint type.

Definitions• Chain riveting: rows are directly opposite each other across the joint.• Zig-zag riveting: rows are staggered.

ApplicationWith two rows on each main plate and covers on both sides, and rows placed opposite, the joint is termed a chain-riveted double cover butt joint.

Final AnswerChain-riveted double cover butt joint.