Stair Type Doglegged Quarter Space Rise(mm) Stair Width (mm) Vertical ht. of floors(mm) No. of flights bet.floors(mm) Stair hall length(mm) Stair hall Breadth(mm) Live load(N/Sq.mm) 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 Distributors dia(mm) 6 8 10 12