Rivet geometry — terminology for spacing The distance measured along a row between the centres of two adjacent rivets in the same row is called:

Introduction / Context:
Accurate terminology for fastener spacing is critical for detailing and checking riveted or bolted connections. Spacing affects strength, deformation compatibility, and the likelihood of tearing or block shear failures.

Given Data / Assumptions:

• Row of rivets or bolts arranged along the load direction.
• Centre-to-centre measurements are used for layout.
• Standard definitions per steelwork practice.

Concept / Approach:

Pitch (p) is the longitudinal centre-to-centre distance between adjacent fasteners in the same row. Gauge (g) is the transverse distance between adjacent rows. Staggered pitch refers to the diagonal centre-to-centre spacing between offset fasteners in adjacent rows. Edge distance is from fastener centre to the plate edge; lap refers to plate overlap length in lap joints.

Step-by-Step Solution:

Verification / Alternative check:

Design provisions specify minimum pitch to avoid net-section tearing and to ensure proper bearing; these clauses explicitly use the term “pitch”.

Why Other Options Are Wrong:

• Lap: joint overlap length, not fastener spacing.
• Gauge: spacing between rows, not along the row.
• Staggered pitch: diagonal spacing across rows.
• Edge distance: from fastener to plate edge, not between fasteners.

Common Pitfalls:

• Confusing gauge with pitch, especially in multi-row patterns.
• Measuring from edge rather than centre when applying minimum pitch rules.

Final Answer:

pitch.