Which term describes the load capacity of a bridge under maximum permissible load for special service conditions?

• A. Operating Rating
• B. Negative Moment
• C. On the Overpass
• D. Nosing

Answer: (A)

Load ratings describe how much weight a bridge can safely carry under different conditions. The term that captures the maximum permissible load for special service conditions is the operating rating. This rating reflects the actual capacity to carry live loads given the bridge’s current condition and any special service requirements, such as permits for heavy or unusual loads. It accounts for deterioration, aging, and safety margins, and is used to determine what loads are allowed in non-standard situations. The other terms aren’t about describing a safe carrying capacity under special service loads: negative moment is a bending moment concept in analysis, while the remaining phrases aren’t technical terms for load capacity.