This load combination represents the simultaneous occurrence of normal vehicular use of the bridge within a 90 km/h wind event, with load factors of 1.35 and 0.40 respectively.

• A. Strength V
• B. Strength I
• C. Strength II
• D. Strength III

Answer: (A)

In LRFD, there are predefined load combinations that represent different ways loads can occur together on a bridge. The scenario described involves two loads acting at once: vehicular live load with a factor of 1.35, and wind with a factor of 0.40, during a 90 km/h event. The combination that uses these exact two loads with those factors is the one intended to model wind acting simultaneously with normal traffic, which is Strength V. That’s why this option best matches the described loading condition. The other strength states correspond to different load patterns or factors and do not reflect this particular pair of loads and magnitudes.