Identification of riveted joint type Two main plates butt against each other and are connected with two cover plates using two rows of rivets. What is this joint called?

Introduction / Context:
Riveted and bolted joints are classified by how plates are brought together (lap vs. butt), number of cover plates, and the number/arrangement of fastener rows. Correct terminology is important in fabrication drawings and specifications.

Given Data / Assumptions:

• Main plates meet at a butt (their edges touch).
• There are two cover plates, one on each side of the joint.
• Two rows of rivets are used.

Concept / Approach:
Butt joints use cover plates (“straps”) to connect abutting main plates. With two straps and two rows of rivets, the descriptive name is “double-riveted double-cover butt joint.”

Step-by-Step Solution:

Verification / Alternative check:
Fabrication standards use the same nomenclature, often abbreviated as DR-DC butt joint.

Why Other Options Are Wrong:

• Lap joint has overlapping main plates, not abutting.
• Single-riveted/single-cover variants do not match the given description.
• “Butt joint” alone is incomplete; does not specify rows or covers.

Common Pitfalls:
Confusing number of rows with number of covers; they describe different aspects.

Final Answer:
Double-riveted double-cover butt joint