Revised version of Reinforced concrete calculator is now posted at
http://civilengineer.webinfolist.com...amanalysis.htm (FPS/
North American Units)
http://civilengineer.webinfolist.com...manalysism.htm (SI/
Metric Units)

With this calculator now you can calculate the Tensile, compressive
and bending moment strengths of rectangular reinforced concrete beam.
It will also calculate the strain in the layers of tension and
compression rebar which helps in deciding whether steel has yielded
or
not.