Clear span(mm) L/B Bearing(mm) Singly reinforced Singly reinforced Doubly reinforced Load on beam(N/m) 2000 3000 4000 5000 6000 7000 Custom Concrete(N/Sq.mm) M-15 M-20 M-25 M-30 M-35 M-40 M-45 M-50 Steel(N/Sq.mm) Fe-250 Fe-415 Fe-500 Main rod dia(mm) 10 12 16 20 22 25 30 Stirrups dia(mm) 6 8 10 12 Tie rod dia(mm) 10 12 16 20 22 25 30 End/Middle span Right End span Left End span Middle span Beam No.(Ref)