SASA DESIGN LAB // IS 456:2000 LIMIT STATE METHODCOGNISTRUCT PVT. LTD.
RC Beam Section & Ductility Auditor
Audit reinforced concrete beam cross-sections against IS 456:2000 Limit State of Collapse in Flexure. Verify neutral axis depth (x_u / d), limiting moment capacity (M_u), and under-reinforced ductile failure modes.
1. Cross-Section & Material TraitsIS 456 CL 38
Tension Reinforcement (Ast)
Number of Tension Bars:4 Bars
Total Steel Area (Ast):1257 mm²
UNDER-REINFORCED SECTION
x_u / d = 0.405 (Max: 0.46)Ductile Tension Failure Mode (Safe)
Section satisfies IS 456 Cl 38.1 ductile failure mode requirements. Steel rebar yields before concrete crushing in compression.
Factored Moment Capacity (M_u)
227.52 kN·m
Section Ultimate Resistance
Steel Percentage (P_t)
0.84 %
Limits: 0.17% min to 4.0% max
Section Mechanics DetailsIS 456 LSM
Actual NA (xu)
202.5 mm
Limiting NA (xu,max)
230.0 mm
Lever Arm (z)
415.0 mm
Min Steel %
0.17%
Max Steel %
4.0%
Ductility Verdict
Compliant
Live Sensor Deployment on Concrete Transfer Beams
Affix KAVACH edge strain sensors directly to maximum moment tension zones.