Internal Redundancy is defined as

• A. Internal Redundancy
• B. Shear
• C. Torsion
• D. Flexibility

Answer: (A)

Redundancy in a bridge is about having more than one way for loads to be carried if something fails. Internal redundancy specifically means these backup load paths are built into the structure itself—the members and connections inside the main framing provide alternate routes for forces, so the structure can redistribute load and avoid immediate collapse if a member or connection is compromised. That’s why the term itself is the best definition here: it directly describes the presence of these internal, multiple load paths.

Think of it as the difference between a single, exposed member carrying all the load and a network of connected members that share the load. Shear, torsion, and flexibility describe how forces act or how the material or structure responds, not the existence of multiple internal load paths that keep the system functioning after damage.