Hi, I have to design a steel structured truss footbridge. Im using beam anology to determine the correct member sizes. Having trouble determining the maximum design moment (M*) Here's what I have calculated thus far: Q=6kN/m G=1kN/m 50m long, 3m depth, 3.125m spacing Self Weight Preliminary Design Chords :150UC30.0 Tension-Web :90x90x6EA Comp-Web :150PFC therefore SW=4.48kN/m W*=1.2(1+4.84)+1.5(6) W*=16/2 W*=8kN/m per truss M*=2500/3m depth N*=833kN After trial and error, all satisfy N*<Nt,Nc Chord :200UC46.2 Tension-Web :125x125x12EA Comp-Web :380PFC From this point onwards, how do I solve for M*<Mb? And do I solve M*<Mb individually for all members?: M*<Mb,200UC46.2 M*<Mb,125x125x12EA M*<Mb,380PFC ??