RC Beam Design Calculator
Multi-code reinforced-concrete beam design — SANS 10100, BS 8110 and Eurocode 2. Enter span and loads for live shear-force, bending-moment and deflected-shape diagrams, the reinforcement section, full ULS/SLS checks and a printable step-by-step calc sheet.
SANS/BS use the validated STATIX engine — Eurocode 2 per EN 1992-1-1
Inputs
Beam
Design code
Beam & loading (ULS)
%
m
kN·m
kN/m
m
Section geometry
mm
mm
mm
Blank = prismatic (constant depth). Rectangular sections only — depth varies linearly from h at the start to h₂ at the far end.
mm
Materials
MPa
MPa
Serviceability
µε
Beam & loading
Shear force
Bending moment
Deflected shape
Design result
—
—
enter loading
| Design moment MEd | — |
| Design shear VEd | — |
| Effective depth d | — |
| K | — |
| Lever arm z | — |
| Tension steel As,req | — |
| Bars provided | — |
| Shear links | — |
Reinforcement
Design checks
Support reactions for column / footing design
Reinforcement — required vs provided click a bar to edit · drag body to move · drag ends to curtail · double-click to add
As required (from BMD)
As provided (bar groups)
ΣAs provided (curve)
section cut — drag to scrub
deficient
Section along the beam drag the amber cut line above, or the slider — the section shows the actual bars at that point
Reinforcement — elevation
Bar bending schedule SANS 282 / SABS 0144
Select a shape code per bar mark to set end hooks / bends. A/B/C/D are the SANS 282:2004 bending dimensions (mm); cutting lengths nominal — anchorage/laps to detailer. Marks match the elevation.
Step-by-step calculation
Combined bending schedule — all beams
Every beam in the project, aggregated. Marks are prefixed with each beam name. Use “Add beam” above to build the full schedule, then Download PDF (print → Save as PDF). Cutting lengths per SANS 282:2004 (nominal).
This isn't a toy calculator
It runs the same engine as STATIX, the structural suite this calculator is built from — analysis, design and connections in one place. A full 3D modeller with native CBFEM is planned.