Home/Tools/Reinforced Concrete Beam Design Calculator RO Reinforced Concrete Beam Design Calculator ACI 318 preliminary reinforced concrete beam design and analysis. Beam width (mm) Overall depth (mm) Span (m) Clear cover (mm) Concrete f′c (MPa) Steel fy (MPa) Main bar diameter (mm) Bottom bars Stirrup diameter (mm) Dead load (kN/m) Live load (kN/m) Calculate Beam