In the context of web gaps, what 1985 requirement was mandated?

• A. The connection of the flanges
• B. The elimination of gaps in stiffeners
• C. Additional corrosion protection
• D. The use of alternative materials

Answer: (B)

Eliminating gaps in stiffeners is about ensuring the web area transfers load smoothly and without interruption. When a stiffener doesn’t sit flush against the web, the path for shear and bending moments becomes uneven, creating small stress concentrations that can grow into fatigue cracks under repeated traffic. Moisture and dirt can also collect in gaps, accelerating corrosion at the stiffener–web interface. The 1985 requirement standardized that stiffeners be installed without gaps, so the contact between stiffener and web is continuous and the load is carried more uniformly. In practice, inspectors look for any space or misalignment along stiffeners and, if found, the area is repaired to create a continuous, flush interface. This focus directly improves fatigue resistance and long-term durability of the bridge. Other options touch on related ideas (flange connections, added corrosion protection, or new materials) but do not reflect the specific 1985 rule about closing gaps in stiffeners.