I am using an 8" steel plate as a beam that will undergo moment forces and deflections. I am not sure how to calculate the maximum moment capacity of a plate like this. I think that the deflection would = Fb*L^3/(48*E*I). Does this look correct? I know how to calculate the max moment in the beam, but I need to know the nominal moment strength. Does anyone know the equation to do this? I believe that I will have to divide this by 1.67 for ASD allowable strength.