Question 4 (50 marks) The elevation and cross-section of a one span deck-girder bridge (simply supported) are shown below. Carry out a longitudinal analysis of the bridge to (1) find the nominal dead loads (DC) and the nominal future wearing surface load (DW) per unit length of Beam 1; (2) Determine the nominal maximum absolute bending moment and shear due to the dead loads, DC and DW and due to AASHTO HL93 live load on Beam I. Design Parameters Density of Concrete W0.145 k/ft? Thickness of future wearing surface tfws = 3 in. Density of future wearing surface WFWs = 0.14 kft? UV 5 spacing at 8 ft Beam 1 1.7 ft 50 ft Cross section of the parapet 8 in. 40 in. 14 in. 5@8 ft = 40 ft -3 tt 3 ft- 46 ft