Tacking rivets in tension members – maximum spacing (pitch in line) In a tension member, tacking rivets are provided at a pitch in line not exceeding:

Introduction / Context:
Tacking rivets (or bolts) in tension members prevent local separation of built-up components and maintain alignment. Codes limit their spacing to ensure adequate stitching even when the primary connectors are widely spaced.

Given Data / Assumptions:

• Tension member composed of multiple components (e.g., double angles or plates).
• Looking for maximum allowed pitch in line for tacking rivets.

Concept / Approach:
For tension members, the usual maximum spacing limit is about 1.0 m along the member line (i.e., 100 cm). This differs from compression members, for which limits are generally smaller to control buckling of components.

Step-by-Step Solution:
Identify member type → tension.Apply spacing rule → pitch ≤ 100 cm.Select 100 cm from the options.

Verification / Alternative check:
Handbook detailing tables consistently list a 1 m maximum pitch for tacking fasteners in tension members.

Why Other Options Are Wrong:

• 25, 50, 75 cm: more conservative than required by common guidance.

Common Pitfalls:
Applying compression-member stitching limits to tension members; compression requires tighter stitching due to local buckling risk.

Final Answer:
100 cm