Request a Consultation→
Engineering Tools/RC Design
Design Software

RC Beam Design

Reinforced concrete beam design per ACI 318-25 (SI units) — flexure (singly + doubly + T-beam), shear (Vc + Vs + max stirrup spacing), Branson deflection, and ACI §24.3 crack control. Validated against ACI 318-25 first-principles formulas (50/50 tests).

Templates

Start from a textbook example, then edit.

✗
Beam FAILS — deflection deficit at x=3.00 m: Δ=16.99 mm > L/480=12.50 mm (+35.9%).Viga NO CUMPLE — déficit de deflexión en x=3.00 m: Δ=16.99 mm > L/480=12.50 mm (+35.9%).→ Increase h (depth) — deflection scales as h³. OR raise the limit category if non-structural elements aren't attached. / Aumenta h (peralte) — la deflexión escala con h³. O cambia la categoría de límite si no hay elementos no-estructurales adheridos.
68.2%
✗ FAIL

Loading 3D viewer…

FLEXURE — Mu(x) vs φMn(x)

PASSES · 68.2%
0106212319425531kN·m0123456x (m)worst x=3.00mMu=315.0, φMn=461.7Mu (demand)φMn (capacity)

SHEAR — Vu(x) vs φVn(x)

PASSES · 84.8%
053106159212265kN0123456x (m)worst x=0.00mVu=195.0, φVn=230.1Vu (demand)φVn (capacity)

Span L = 6.00 m. Stations evaluated: 22. Convention: x measured from left support.

Geometry (mm)

Materials

⚡ Auto-Design (Phase 5b)

Given current Mu, Vu, Tu and geometry/materials, recommend bars, stirrup spacing, and skin reinforcement that meet ACI 318-25 §22.2 + §22.5 + §22.7 + §9.6.

Tension reinforcement

Stirrups

Top bars (compression / hangers §9.7.6.4)

At least 2 top bars are needed to support the stirrup cage (Wight §5-3). They also act as compression steel if the section is doubly-reinforced.

Skin reinforcement §9.7.2.3 (optional, h ≤ 900 mm)

Loads

Envelope mode: Mu and Vu are derived from the demand source. Edit them in the Envelope tab.

Demand source

Point loads

Print report branding (your firm)

Optional. Add your firm logo/name. Embedded only in the report; not uploaded.