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Abstract |
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Purpose: Design a bridge for NAU Capital Assets to span McConnell Drive and Sinclair Wash to improve safety and function for pedestrians, bicyclists, and vehicular traffic.
Method: The current wooden bridge that allows crossing over Sinclair Wash is dilapidated and creates unsafe conditions for pedestrians, bicyclists, and vehicular traffic at street level. The solution is a grade separated crossing over the roadway to eliminate conflict between pedestrians/bikes and vehicles. To accomplish this, ABC Engineering completed a 60% bridge design. The bridge ABC Engineering designed consists of two spans. Abutments are located on each side of the bridge and a bent is placed in the middle of the spans. The bridge provides a 14 ft. clearance for vehicles and clears the 100 year storm event. In creating the bridge design, ABC Engineering performed traffic surveys, alignment design, and structural design which consisted of loading analysis, deck design, abutment design, bent design, MSE wall design. |
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McConnell Drive Pedestrian Bridge |
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Design Criteria |
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Vehicle Loading: A vehicle design load of 20,000 Ib. (H-10 Truck) for a clear deck width over 10ft will be used according to AASHTO 1.2.1.2. Pedestrian Live Loads: The 85 pounds per square foot pedestrian load will be used according to AASHTO 1.2.1.1 Deflection – less than L/500 AASHTO 1.3.1 Clearance – 14ft above roadway Wash capacity will not be affected Minimize impact on utilities. ADA Standards will be followed. Minimize costs |
