SPAN AND WIDTH: 2.1. Bridge length shall be 120 feet (divisible by 10 feet). 2.2. Each span shall be simple and clear. 2.3. Road surface width shall be 13.7 feet 3. ENGINEERING: 3.1. Truck live load selection: Shall be AASHTO loading LFD HS20 LRFR HL-93 by a FHWA memorandum INFORMATION: Bridge Load Ratings for the National Bridge Inventory dated October 30, 2006). 3.2. Pedestrian design load shall be 90 lbs. per square foot acting simultaneously with the truck live load. 3.3. Design Standard shall be the AASHTO Bridge Design Code (ASD, LFD or LRFD) and all interim amendments. 3.4. Live load deflection shall not exceed the ratio of L/800 or other. 3.5. Design Life: Live load fatigue shall be analyzed in accordance with the AASHTO design code for 500,000 cycles (or other appropriate number of cycles) using Category E for the trusses. Fatigue tests shall not be acceptable...
