// multi-utility computation suite · offline · instant · precise
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eng.moment-redistribution-RC-beam Calculator
Calculates moment redistribution in a reinforced concrete beam per ACI 318, allowing reduction of peak moments up to 20%. Moment redistribution exploits plastic rotation capacity at over-reinforced sections to reduce design moments — limited to 20% to ensure adequate ductility.
Inputs
M Elastic Support Knm
Reference formula or conversion factor shown for context.
Redistribution Pct
Reference formula or conversion factor shown for context.
M Elastic Span Knm
Distance between supports (m). Longer spans experience larger bending moments — structural adequacy must be rechecked.
Results
design support moment (kNm)
Sample size or count used in the calculation.
design span moment (kNm)
Sample size or count used in the calculation.
moment redistributed (kNm)
Sample size or count used in the calculation.
xu/d limit for redistribution
Sample size or count used in the calculation.
EC2 cl.5.5: δ ≥ 0.44+1.25xu/d | max 30% redistribution for Class B/C steel
The classification assigned based on the computed value.