What is the term for the center-to-center distance between rivets in neighboring rows of a zig-zag joint ____________________?
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Answer: C. diagonal pitch
Explanation
The center-to-center distance between rivets in neighboring rows of a zig-zag joint is called diagonal pitch. It measures the shortest diagonal path connecting rivet holes across adjacent parallel rows. This dimension ensures adequate material strength along slanted potential failure lines in joints. Zig-zag riveting staggers fasteners to maintain higher plate cross-sectional area compared to chain riveting. Joint design requires calculating tearing resistance along both straight pitch and diagonal pitch lines. Standard boiler and pressure vessel codes specify minimum diagonal pitch requirements for safety.
Structural steel fabricators and boilermakers use diagonal pitch specifications for riveted plate seams. Proper rivet spacing prevents plate cracking and leakage under high internal pressure loads. Understanding joint geometry is critical for historical restoration and heavy metal fabrication. Pitch refers to the center-to-center distance between adjacent rivets in the same single row. Back pitch measures the perpendicular distance between adjacent parallel rows of fasteners. Diametral pitch is a gear tooth sizing term unrelated to riveted structural joints.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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