Beam parameters — IS 456 (limit state)

Span L 6.0 m
Width b 300 mm
UDL (live + finish) 30 kN/m
Point load at midspan 80 kN
Steel fy

Factored moment Mu

—

kN·m

Mu,lim (M50)

—

kN·m

Mu,lim (M160)

—

kN·m

Conventional — M50

Required effective depth d

—

mm

Overall depth D

—

mm (d + 50 cover)

Ast required

—

mm²

UHPC — M160

Required effective depth d

—

mm

Overall depth D

—

mm (d + 40 cover)

Ast required

—

mm²

Depth reduction (UHPC vs Conventional) —

Based on IS 456 Cl. 38.1 singly reinforced limit state design. xu,max/d: 0.46 (Fe415), 0.46 (Fe500 approx per SP16). Self-weight included iteratively. UHPC uses same IS 456 flexure formula with fck=160.