Okay - for kicks and giggles here are some example beam calcs ...
Deflection calcs, uncracked lab beam:
http://www.associatedcontent.com/article/1570371/deflections_of_an_uncracked_reinforced.html?cat=4
Cracked beam section calcs ...
http://www.associatedcontent.com/article/1570415/cracked_beam_neutral_axis_and_moment.html?cat=4
Internal Stresses Calcs ...
http://www.associatedcontent.com/article/1570451/internal_stresses_in_a_cracked_reinforced.html?cat=4
Effective Moment of Inertia calcs ... YIKES!
http://www.associatedcontent.com/article/1570437/effective_moment_of_inertia_and_deflections.html?cat=4
