In riveted (or bolted) connections, what is the term for the distance measured along one rivet line from the centre of a rivet to the centre of the nearest rivet on an adjacent, parallel rivet line?

Introduction / Context:
Rivet and bolt spacing terminology is crucial for connection detailing to prevent tearing and ensure efficient load transfer. Different distances describe different directions and patterns of hole placement in one or multiple lines.

Given Data / Assumptions:

• We compare pitch, gauge, and staggered pitch.
• Adjacent rivet line is parallel to the original line.

Concept / Approach:
Pitch is the centre-to-centre distance of consecutive fasteners along the same line. Gauge is the perpendicular distance between parallel rivet lines. When lines are staggered, the diagonal centre-to-centre distance between a rivet and the nearest rivet on an adjacent line is called staggered pitch; along one line, the longitudinal offset pairs with the transverse gauge to define the diagonal spacing.

Step-by-Step Solution:
Identify the asked direction: from a rivet on one line to the nearest rivet on the adjacent line (diagonal). Exclude straight-line pitch (same line only) and gauge (perpendicular distance only). Conclude the correct term is “staggered pitch”.

Verification / Alternative check:
Design checks for net section across staggered patterns use staggered pitch to compute the additional term that increases net area because of the zig-zag path.

Why Other Options Are Wrong:

• Pitch: Measures along one line only.
• Gauge: Measures perpendicular spacing between lines.
• All/None: Not applicable; a specific correct term exists.

Common Pitfalls:

• Misusing “pitch” generically for any spacing, which leads to detailing errors.

Final Answer:
Staggered pitch.